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King D, Hume P, Clark T, Wethe J. Use of the concussion check protocol for concussion assessment in a female soccer team over two consecutive seasons in New Zealand. J Neurol Sci 2024; 460:123011. [PMID: 38615404 DOI: 10.1016/j.jns.2024.123011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2024] [Revised: 03/24/2024] [Accepted: 04/09/2024] [Indexed: 05/12/2024]
Abstract
AIM Address deficiencies in access to sports sideline medical care by using a Concussion Check Protocol (CCP) for non-medically-trained people. METHOD A prospective observational cohort study was undertaken on a single amateur female club-based soccer team over two consecutive years in New Zealand utilising a non-medically trained support person termed a Safety officer. CCP is an extension of the King-Devick test with features such as warning signs and symptoms of concussion built into the application. All players suspected of having a potential concussive injury were tested on the match sideline. RESULTS The study overall incidence of match-related concussions was 20.8 (95% CI: 11.8 to 36.6) per 1000 match-hrs, with mean missed-match duration of 31 (95% CI: 27.9 to 34.1) days. Twelve players over the study had a significantly slower post-injury KD (49.9 [44.3 to 64.1]s; χ2(1) = 11.0; p = 0.0009; z = -2.9; p = 0.0033; d = 0.30) and/or reported symptoms, compared with their own baseline (47.2 [44.3 to 64.1]s). CCP had an overall sensitivity of 100% (95% CI: 73.5% to 100.0%), specificity of 100% (95% CI: 69.2% to 100.0%) and positive predictive value (PPV) of 100% (84.6% to 100.0%). CONCLUSION Sideline use of CCP was undertaken successfully by non-medically trained people and provided a reliable platform for concussion identification.
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Affiliation(s)
- Doug King
- Auckland Bioengineering Institute, The University of Auckland, Auckland, New Zealand; Traumatic Brain Injury Network (TBIN), Auckland University of Technology, Auckland, New Zealand; School of Science and Technology, University of New England, Armidale, NSW, Australia; Wolfson Research Institute for Health and Wellbeing, Department of Sport and Exercise Sciences, Durham University, Durham, UK; Sports Performance Research Institute New Zealand (SPRINZ), Auckland University of Technology, Auckland, New Zealand.
| | - Patria Hume
- Auckland Bioengineering Institute, The University of Auckland, Auckland, New Zealand; Traumatic Brain Injury Network (TBIN), Auckland University of Technology, Auckland, New Zealand; Sports Performance Research Institute New Zealand (SPRINZ), Auckland University of Technology, Auckland, New Zealand; Technology and Policy Lab - Law School, The University of Western Australia, Perth, Australia
| | - Trevor Clark
- International College of Management Sydney, Manly, New South Wales, Australia
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Donahue CC, Walton SR, Oldham JR, Beidler E, Larson MJ, Broshek D, Cifu DX, Resch JE. Influence of sleep symptoms on recovery from concussion in collegiate athletes: a LIMBIC MATARS consortium investigation. Brain Inj 2024:1-7. [PMID: 38679931 DOI: 10.1080/02699052.2024.2347542] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2023] [Accepted: 04/22/2024] [Indexed: 05/01/2024]
Abstract
OBJECTIVE Changes in sleep quality and quantity are commonly endorsed by individuals following a concussion. Limited data exists examining the role of sleep disturbances within 72 hours, and throughout recovery, from concussion. The objective of this study was to determine if the number of days to symptom resolution varied between collegiate athletes with or without sleep-related symptoms following a concussion. DESIGN Retrospective chart review. METHODS Collegiate athletes (n = 539) who were diagnosed with a concussion between the 2015-2020 sport seasons participated in this retrospective chart review. Participants were divided into groups based on the presence or absence of sleep symptoms within 72 hours of a diagnosed concussion. A Mann-Whitney U test was used to compare days to symptom resolution between groups with α = 0.05. RESULTS Of the 539 participants, 250 (46.3%) reported sleep-related symptoms. Participants with sleep-related symptoms took significantly longer (U = 30656, p = 0.002) to report symptom resolution at rest (median [full range] = 8.00[0-423]) as compared to participants who did not report sleep-related symptoms (6.00[0-243] days). CONCLUSION Collegiate athletes that report sleep-related symptoms immediately following concussion (<72 hours) were observed to take, on median, two days longer to achieve symptom resolution at rest when compared to athletes who did not endorse the same symptoms.
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Affiliation(s)
- Catherine C Donahue
- Department of Orthopedics, University of Colorado School of Medicine, Aurora, Colorado, USA
- Sports Medicine Center, Children's Hospital of Colorado, Aurora, Colorado, USA
| | - Samuel R Walton
- Department of Physical Medicine and Rehabilitation, Virginia Commonwealth University School of Medicine, Richmond, Virginia, USA
| | - Jessie R Oldham
- Department of Physical Medicine and Rehabilitation, Virginia Commonwealth University School of Medicine, Richmond, Virginia, USA
| | - Erica Beidler
- Department of Athletic Training, Duquesne University, Pittsburgh, Pennsylvania, USA
| | - Michael J Larson
- Department of Psychology and Neuroscience Center, Brigham Young University, Provo, Utah, USA
| | - Donna Broshek
- Department of Psychiatry and Neurobehavioral Sciences, University of Virginia Health, Charlottesville, Virginia, USA
| | - David X Cifu
- Department of Physical Medicine and Rehabilitation, Virginia Commonwealth University School of Medicine, Richmond, Virginia, USA
| | - Jacob E Resch
- Department of Kinesiology, University of Virginia, Charlottesville, Virginia, USA
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3
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Domena AM, Rosenblum DJ, Donahue CC, Resch JE. The Influence of Race on Time to Symptom Resolution Following Sport Concussion in Collegiate Athletes. J Sport Rehabil 2024:1-6. [PMID: 38335953 DOI: 10.1123/jsr.2023-0082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 09/14/2023] [Accepted: 12/20/2023] [Indexed: 02/12/2024]
Abstract
CONTEXT Race has been shown to influence computerized neurocognitive test scores, motor function test scores, and reported symptomology following sport-related concussion (SRC). However, the effect race may have on recovery time following SRC remains unknown. The objective of this study was to determine the influence of race on days until symptom free from SRC in NCAA Division 1 collegiate athletes. DESIGN Prospective cohort study. METHODS Participants were Black (n = 53 [28% female]) and White (n = 150 [43.3% female]) who were on average 19.0 (1.21) and 20.2 (1.3) years of age, respectively. Data were collected from the 2015-2016 to 2020-2021 collegiate sport seasons. Participants were evaluated before and after an SRC at empirically derived time points. The primary outcome measure was time until symptom free (days). Additional outcomes included baseline and postinjury Immediate Postconcussion Assessment and Cognitive Test and Sensory Organization Test (SOT) scores. A Mann-Whitney U test compared days to symptom free between groups. Immediate Postconcussion Assessment and Cognitive Test and SOT outcome scores were analyzed using a 2 (group) × 2 (time) analysis of variance. RESULTS White participants had a longer median recovery time (9 d) to symptom free compared with Black participants (6 d [P = .04]). Statistically significant differences were observed between Black 87.3 (9.84) and White 90.4 (8.30) groups for Immediate Postconcussion Assessment and Cognitive Test's verbal memory composite score (P = .03). Postinjury, White participants scored significantly higher 44.5 (5.63) on visual motor speed compared with Black participants (42.4 (5.90) [P = .02]). Within-group SOT differences between baseline and postinjury testing were observed in both groups (all P < .001). CONCLUSIONS Black collegiate athletes achieved symptom resolution sooner than White athletes. We did not explore underlying sociocultural factors such as socioeconomic status or previous concussion education, which may have influenced our results. Future studies should explore factors that may contextualize these findings.
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Affiliation(s)
- Angelina M Domena
- Department of Kinesiology, University of Virginia, Charlottesville, VA, USA
| | - Daniel J Rosenblum
- Department of Kinesiology, University of Virginia, Charlottesville, VA, USA
| | - Catherine C Donahue
- Department of Kinesiology, University of Virginia, Charlottesville, VA, USA
- Department of Orthopedics, University of Colorado School of Medicine, Aurora, Colorado
- Sports Medicine Center, Children's Hospital of Colorado, Aurora, Colorado
| | - Jacob E Resch
- Department of Kinesiology, University of Virginia, Charlottesville, VA, USA
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Wilmoth K, Brett BL, Emmert NA, Cook CM, Schaffert J, Caze T, Kotsonis T, Cusick M, Solomon G, Resch JE, Cullum CM, Nelson LD, McCrea M. Psychometric Properties of Computerized Cognitive Tools and Standard Neuropsychological Tests Used to Assess Sport Concussion: A Systematic Review. Neuropsychol Rev 2023; 33:675-692. [PMID: 36040610 DOI: 10.1007/s11065-022-09553-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Accepted: 05/03/2022] [Indexed: 11/29/2022]
Abstract
Athletic programs are more frequently turning to computerized cognitive tools in order to increase efficiencies in concussion assessment. However, assessment using a traditional neuropsychological test battery may provide a more comprehensive and individualized evaluation. Our goal was to inform sport clinicians of the best practices for concussion assessment through a systematic literature review describing the psychometric properties of standard neuropsychological tests and computerized tools. We conducted our search in relevant databases including Ovid Medline, Web of Science, PsycINFO, and Scopus. Journal articles were included if they evaluated psychometric properties (e.g., reliability, sensitivity) of a cognitive assessment within pure athlete samples (up to 30 days post-injury). Searches yielded 4,758 unique results. Ultimately, 103 articles met inclusion criteria, all of which focused on adolescent or young adult participants. Test-retest reliability estimates ranged from .14 to .93 for computerized tools and .02 to .95 for standard neuropsychological tests, with strongest correlations on processing speed tasks for both modalities, although processing speed tasks were most susceptible to practice effects. Reliability was improved with a 2-factor model (processing speed and memory) and by aggregating multiple baseline exams, yet remained below acceptable limits for some studies. Sensitivity to decreased cognitive performance within 72 h of injury ranged from 45%-93% for computerized tools and 18%-80% for standard neuropsychological test batteries. The method for classifying cognitive decline (normative comparison, reliable change indices, regression-based methods) affected sensitivity estimates. Combining computerized tools and standard neuropsychological tests with the strongest psychometric performance provides the greatest value in clinical assessment. To this end, future studies should evaluate the efficacy of hybrid test batteries comprised of top-performing measures from both modalities.
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Affiliation(s)
- Kristin Wilmoth
- Departments of Psychiatry and Physical Medicine & Rehabilitation, UT Southwestern Medical Center, 5323 Harry Hines Blvd., Dallas, TX, 75390-9055, USA.
| | - Benjamin L Brett
- Departments of Neurosurgery and Neurology, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Natalie A Emmert
- Department of Neurology, University at Buffalo, State University of New York, Buffalo, NY, USA
| | - Carolyn M Cook
- Department of Neurology, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Jeffrey Schaffert
- Department of Psychiatry, UT Southwestern Medical Center, Dallas, TX, USA
| | - Todd Caze
- Department of Psychiatry, UT Southwestern Medical Center, Dallas, TX, USA
| | - Thomas Kotsonis
- Department of Neurology, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Margaret Cusick
- Department of Neurology, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Gary Solomon
- Player Health and Safety Department, National Football League and Department of Neurosurgery, Vanderbilt University School of Medicine, Nashville, TN, USA
| | - Jacob E Resch
- Department of Kinesiology, University of Virginia, Charlottesville, VA, USA
| | - C Munro Cullum
- Departments of Psychiatry, Neurology, and Neurological Surgery, UT Southwestern Medical Center, Dallas, TX, USA
| | - Lindsay D Nelson
- Departments of Neurosurgery and Neurology, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Michael McCrea
- Departments of Neurosurgery and Neurology, Medical College of Wisconsin, Milwaukee, WI, USA
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Willwerth SB, Lempke LB, Lugade V, Meehan WP, Howell DR, DeJong Lempke AF. Ankle Sprain History Does Not Significantly Alter Single- and Dual-Task Spatiotemporal Gait Mechanics. J Sport Rehabil 2023; 32:903-909. [PMID: 37758257 DOI: 10.1123/jsr.2022-0445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Revised: 07/06/2023] [Accepted: 07/27/2023] [Indexed: 10/03/2023]
Abstract
CONTEXT Single- and dual-task walking gait assessments have been used to identify persistent movement and cognitive dysfunction among athletes with concussions. However, it is unclear whether previous ankle sprain injuries confound these outcomes during baseline testing. The purpose of this study was to determine the effects of (1) ankle sprain history and (2) time since prior ankle sprain injury on single- and dual-task spatiotemporal gait outcomes and cognitive measures. DESIGN Cross-sectional study. METHODS We assessed 60 college Division-I athletes (31 with ankle sprain history; 13 females and 18 males, 19.3 [0.8] y; 29 with no ankle sprain history, 14 females and 15 males, 19.7 [0.9] y) who completed injury history forms and underwent concussion baseline testing. Athletes completed single- and dual-task gait assessments by walking back and forth along an 8-m walkway for 40 seconds. Athletes wore a smartphone with an associated mobile application on their lumbar spine to record spatiotemporal gait parameters and dual-task cognitive performance. Separate multivariate analyses of variance were used to assess the effects of ankle sprain injury history on spatiotemporal measures, gait variability, and cognitive performance. We performed a multivariate regression subanalysis on athletes who reported time since injury (n = 23) to assess temporal effects on gait and cognitive performance. RESULTS Athletes with and without a history of ankle sprains had comparable spatiotemporal and gait variability outcomes during single- (P = .42; P = .13) and dual-task (P = .75; P = .55) conditions. Additionally, ankle sprain injury history did not significantly influence cognitive performance (P = .35). Finally, time since ankle sprain did not significantly affect single- (P = .75) and dual-task gait (P = .69), nor cognitive performance (P = .19). CONCLUSIONS Ankle sprain injury history did not significantly alter spatiotemporal gait outcomes nor cognitive performance during this common clinical assessment. Future studies may consider including athletes with ankle sprain injury history during concussion assessments.
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Affiliation(s)
- Sarah B Willwerth
- Micheli Center for Sports Injury Prevention, Waltham, MA,USA
- Department of Orthopedics, Division of Sports Medicine, Boston Children's Hospital, Boston, MA,USA
| | - Landon B Lempke
- School of Kinesiology, University of Michigan, Ann Arbor, MI,USA
| | - Vipul Lugade
- Division of Physical Therapy, Binghamton University, Binghamton, NY,USA
| | - William P Meehan
- Micheli Center for Sports Injury Prevention, Waltham, MA,USA
- Department of Orthopedics, Division of Sports Medicine, Boston Children's Hospital, Boston, MA,USA
- Harvard Medical School, Harvard, MA,USA
| | - David R Howell
- Sports Medicine Center, Children's Hospital Colorado, Aurora, CO,USA
- Department of Orthopedics, University of Colorado School of Medicine, Aurora, CO,USA
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6
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McLoughlin J. Concussion Rehabilitation and the Application of Ten Movement Training Principles. Cureus 2023; 15:e46520. [PMID: 37927640 PMCID: PMC10625311 DOI: 10.7759/cureus.46520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/05/2023] [Indexed: 11/07/2023] Open
Abstract
Concussion awareness continues to grow in all aspects of healthcare, including the areas of prevention, acute care, and ongoing rehabilitation. Most of the concussion research to date has focussed on the challenges around screening and diagnosing what can be a complex mix of brain impairments that overlay with additional pre-existing comorbidities. While we expect further progress in concussion diagnosis, progress also continues to be made around proactive rehabilitation, with the emergence of interventions that can enhance the recovery process, maximise function and independence with a return to study, work, and play. Traditionally, optimal multimodal assessments of concussion have treated the physical, cognitive, and psychological domains of brain injury separately, which supports diagnosis, and informs appropriate follow-up care. Due to the complex nature of brain injury, multimodal assessments direct care toward professionals from many different disciplines including medicine, physiotherapy, psychology, neuropsychology, ophthalmology, and exercise physiology. In addition, these professionals may work in different fields such as sports, neurorehabilitation, vestibular, musculoskeletal, community, vocational, and general practice clinical settings. Rehabilitation interventions for concussions employed in practice are also likely to use a blend of theoretical principles from motor control, cognitive, and psychological sciences. This scale of diversity can make information dissemination, collaboration, and innovation challenging. The Ten Movement Training Principles (MTPs) have been proposed as a usable and relevant concept to guide and support clinical reasoning in neurorehabilitation. When applied to concussion rehabilitation, these same 10 principles provide a comprehensive overview of key rehabilitation strategies for current and future practice. Future collaborations can use these training principles to support clinical and research innovations including the rapid rise of technologies in this growing field of rehabilitation practice.
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Affiliation(s)
- James McLoughlin
- College of Nursing and Health Sciences, Flinders University, Adelaide, AUS
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7
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Lempke LB, Caccese JB, Syrydiuk RA, Buckley TA, Chrisman SPD, Clugston JR, Eckner JT, Ermer E, Esopenko C, Jain D, Kelly LA, Memmini AK, Mozel AE, Putukian M, Susmarski A, Pasquina PF, McCrea MA, McAllister TW, Broglio SP, Master CL. Female Collegiate Athletes' Concussion Characteristics and Recovery Patterns: A Report from the NCAA-DoD CARE Consortium. Ann Biomed Eng 2023:10.1007/s10439-023-03367-y. [PMID: 37751028 DOI: 10.1007/s10439-023-03367-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Accepted: 09/07/2023] [Indexed: 09/27/2023]
Abstract
Concussion has been described in the United States (US) collegiate student-athlete population, but female-specific findings are often underrepresented and underreported. Our study aimed to describe female collegiate student-athletes' initial injury characteristics and return to activity outcomes following concussion. Female collegiate student-athletes (n = 1393) from 30-US institutions experienced a concussion and completed standardized, multimodal concussion assessments from pre-injury through unrestricted return to play (uRTP) in this prospective, longitudinal cohort study. Initial injury presentation characteristics, assessment, and return to activity outcomes [<48-h (acute), return to learn, initiate return to play (iRTP), uRTP] were collected. We used descriptive statistics to report injury characteristics, return to activity outcomes, and post-injury assessment performance change categorization (worsened, unchanged, improved) based on change score confidence rank criteria across sport contact classifications [contact (n = 661), limited (n = 446), non-contact (n = 286)]. The median (25th to 75th percentile) days to return to learn was 6.0 (3.0-10.0), iRTP was 8.1 (4.8-13.8), and uRTP was 14.8 (9.9-24.0), but varied by contact classification. Across contact levels, the majority experienced worse SCAT total symptom severity (72.8-82.6%), ImPACT reaction time (91.2-92.6%), and BSI-18 total score (45.2-51.8%) acutely relative to baseline, but unchanged BESS total errors (58.0-60.9%), SAC total score (71.5-76.1%), and remaining ImPACT domains (50.6-66.5%). Our findings provide robust estimates of the typical female collegiate student-athlete presentation and recovery trajectory following concussion, with overall similar findings to the limited female collegiate student-athlete literature. Overall varying confidence rank classification was observed acutely. Our findings provide clinically-relevant insights for athletes, clinicians, researchers, and policymakers to inform efforts specific to females experiencing concussion.
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Affiliation(s)
- Landon B Lempke
- Michigan Concussion Center, University of Michigan, Ann Arbor, MI, USA.
- Exercise and Sport Science Initiative, University of Michigan, Ann Arbor, MI, USA.
- , 830 North University Avenue, Suite 4000, Ann Arbor, MI, 48109, USA.
| | - Jaclyn B Caccese
- School of Health and Rehabilitation Sciences, The Ohio State University, Columbus, OH, USA
| | - Reid A Syrydiuk
- Michigan Concussion Center, University of Michigan, Ann Arbor, MI, USA
| | - Thomas A Buckley
- Department of Kinesiology and Applied Physiology, University of Delaware, Newark, DE, USA
| | - Sara P D Chrisman
- Division of Adolescent Medicine, University of Washington, Seattle, WA, USA
| | - James R Clugston
- Departments of Community Health Family Medicine and Neurology, University of Florida, Gainesville, FL, USA
| | - James T Eckner
- Department of Physical Medicine & Rehabilitation, University of Michigan, Ann Arbor, MI, USA
| | - Elsa Ermer
- Henry M. Jackson Foundation for the Advancement of Military Medicine, Bethesda, MD, USA
- Uniformed Services University of the Health Sciences, Bethesda, MD, USA
| | - Carrie Esopenko
- Department of Rehabilitation and Human Performance, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Divya Jain
- Department of Rehabilitation and Human Performance, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Louise A Kelly
- Department of Exercise Science, California Lutheran University, Thousand Oaks, CA, USA
| | - Allyssa K Memmini
- Department of Health, Exercise & Sports Sciences, University of New Mexico, Albuquerque, NM, USA
| | - Anne E Mozel
- Center for Injury Research and Prevention, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | | | - Adam Susmarski
- Department of Orthopedics and Sports Medicine, United States Naval Academy, Annapolis, MD, USA
| | - Paul F Pasquina
- Uniformed Services University of the Health Sciences, Bethesda, MD, USA
| | - Michael A McCrea
- Center for Neurotrauma Research, Department of Neurosurgery, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Thomas W McAllister
- Department of Psychiatry, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Steven P Broglio
- Michigan Concussion Center, University of Michigan, Ann Arbor, MI, USA
| | - Christina L Master
- Center for Injury Research and Prevention, Children's Hospital of Philadelphia, Philadelphia, PA, USA
- Orthopaedics and Sports Medicine, Pediatrics, Children's Hospital of Philadelphia, Philadelphia, PA, USA
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Neumann KD, Broshek DK, Newman BT, Druzgal TJ, Kundu BK, Resch JE. Concussion: Beyond the Cascade. Cells 2023; 12:2128. [PMID: 37681861 PMCID: PMC10487087 DOI: 10.3390/cells12172128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2023] [Revised: 08/14/2023] [Accepted: 08/17/2023] [Indexed: 09/09/2023] Open
Abstract
Sport concussion affects millions of athletes each year at all levels of sport. Increasing evidence demonstrates clinical and physiological recovery are becoming more divergent definitions, as evidenced by several studies examining blood-based biomarkers of inflammation and imaging studies of the central nervous system (CNS). Recent studies have shown elevated microglial activation in the CNS in active and retired American football players, as well as in active collegiate athletes who were diagnosed with a concussion and returned to sport. These data are supportive of discordance in clinical symptomology and the inflammatory response in the CNS upon symptom resolution. In this review, we will summarize recent advances in the understanding of the inflammatory response associated with sport concussion and broader mild traumatic brain injury, as well as provide an outlook for important research questions to better align clinical and physiological recovery.
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Affiliation(s)
- Kiel D. Neumann
- Department of Diagnostic Imaging, St. Jude Children’s Research Hospital, Memphis, TN 38105, USA;
| | - Donna K. Broshek
- Department of Psychiatry and Neurobehavioral Sciences, University of Virginia, Charlottesville, VA 22903, USA;
| | - Benjamin T. Newman
- Department of Radiology and Medical Imaging, University of Virginia, Charlottesville, VA 22903, USA; (B.T.N.); (T.J.D.); (B.K.K.)
| | - T. Jason Druzgal
- Department of Radiology and Medical Imaging, University of Virginia, Charlottesville, VA 22903, USA; (B.T.N.); (T.J.D.); (B.K.K.)
| | - Bijoy K. Kundu
- Department of Radiology and Medical Imaging, University of Virginia, Charlottesville, VA 22903, USA; (B.T.N.); (T.J.D.); (B.K.K.)
| | - Jacob E. Resch
- Department of Kinesiology, University of Virginia, Charlottesville, VA 22903, USA
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Dunne LAM, Cole MH, Cormack SJ, Howell DR, Johnston RD. Validity and Reliability of Methods to Assess Movement Deficiencies Following Concussion: A COSMIN Systematic Review. SPORTS MEDICINE - OPEN 2023; 9:76. [PMID: 37578611 PMCID: PMC10425315 DOI: 10.1186/s40798-023-00625-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Accepted: 08/02/2023] [Indexed: 08/15/2023]
Abstract
BACKGROUND There is an increased risk of subsequent concussion and musculoskeletal injury upon return to play following a sports-related concussion. Whilst there are numerous assessments available for clinicians for diagnosis and during return to play following concussion, many may lack the ability to detect these subclinical changes in function. Currently, there is no consensus or collated sources on the reliability, validity and feasibility of these assessments, which makes it difficult for clinicians and practitioners to select the most appropriate assessment for their needs. OBJECTIVES This systematic review aims to (1) consolidate the reliability and validity of motor function assessments across the time course of concussion management and (2) summarise their feasibility for clinicians and other end-users. METHODS A systematic search of five databases was conducted. Eligible studies were: (1) original research; (2) full-text English language; (3) peer-reviewed with level III evidence or higher; (4) assessed the validity of lower-limb motor assessments used to diagnose or determine readiness for athletes or military personnel who had sustained a concussion or; (5) assessed the test-retest reliability of lower-limb motor assessments used for concussion management amongst healthy athletes. Acceptable lower-limb motor assessments were dichotomised into instrumented and non-instrumented and then classified into static (stable around a fixed point), dynamic (movement around a fixed point), gait, and other categories. Each study was assessed using the COSMIN checklist to establish methodological and measurement quality. RESULTS A total of 1270 records were identified, with 637 duplicates removed. Titles and abstracts of 633 records were analysed, with 158 being retained for full-text review. A total of 67 records were included in this review; 37 records assessed reliability, and 35 records assessed the validity of lower-limb motor assessments. There were 42 different assessments included in the review, with 43% being non-instrumented, subjective assessments. Consistent evidence supported the use of instrumented assessments over non-instrumented, with gait-based assessments demonstrating sufficient reliability and validity compared to static or dynamic assessments. CONCLUSION These findings suggest that instrumented, gait-based assessments should be prioritised over static or dynamic balance assessments. The use of laboratory equipment (i.e. 3D motion capture, pressure sensitive walkways) on average exhibited sufficient reliability and validity, yet demonstrate poor feasibility. Further high-quality studies evaluating the reliability and validity of more readily available devices (i.e. inertial measurement units) are needed to fill the gap in current concussion management protocols. Practitioners can use this resource to understand the accuracy and precision of the assessments they have at their disposal to make informed decisions regarding the management of concussion. TRAIL REGISTRATION This systematic review was registered on PROSPERO (reg no. CRD42021256298).
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Affiliation(s)
- Laura A M Dunne
- School of Behavioural and Health Sciences, Australian Catholic University, Brisbane, Australia.
- SPRINT Research Centre, Faculty of Health Sciences, Australian Catholic University, Brisbane, Australia.
| | - Michael H Cole
- School of Behavioural and Health Sciences, Australian Catholic University, Brisbane, Australia
- Healthy Brain and Mind Research Centre, Faculty of Health Sciences, Australian Catholic University, Melbourne, Australia
| | - Stuart J Cormack
- SPRINT Research Centre, Faculty of Health Sciences, Australian Catholic University, Brisbane, Australia
- School of Behavioural and Health Sciences, Australian Catholic University, Melbourne, Australia
| | - David R Howell
- Sports Medicine Center, Children's Hospital Colorado, Aurora, CO, USA
- Department of Orthopedics, University of Colorado School of Medicine, Aurora, CO, USA
| | - Rich D Johnston
- School of Behavioural and Health Sciences, Australian Catholic University, Brisbane, Australia
- SPRINT Research Centre, Faculty of Health Sciences, Australian Catholic University, Brisbane, Australia
- Carnegie Applied Rugby Research Centre, School of Sport, Leeds Beckett University, Leeds, UK
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10
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Haider MN, Lutnick E, Nazir MSZ, Nowak A, Chizuk HM, Miecznikowski JC, McPherson JI, Willer BS, Leddy JJ. Sensitivity and Specificity of Exercise Intolerance on Graded Exertion Testing for Diagnosing Sport-Related Concussion: A Systematic Review and Exploratory Meta-Analysis. J Neurotrauma 2023; 40:1524-1532. [PMID: 37014078 DOI: 10.1089/neu.2022.0331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023] Open
Abstract
Abstract There is no single gold standard test to diagnose sport-related concussion (SRC). Concussion-related exercise intolerance, that is, inability to exercise to the individual's appropriate level due to exacerbation of concussion-like symptoms, is a frequent finding in athletes early after SRC that has not been systematically evaluated as a diagnostic test of SRC. We performed a systematic review and proportional meta-analysis of studies that evaluated graded exertion testing in athletes after SRC. We also included studies of exertion testing in healthy athletic participants without SRC to assess specificity. Pubmed and Embase were searched in January 2022 for articles published since 2000. Eligible studies included those that performed graded exercise tolerance tests in symptomatic concussed participants (> 90% of subjects had an SRC, seen within 14 days of injury), at the time of clinical recovery from SRC, in healthy athletes, or both. Study quality was assessed using the Newcastle-Ottawa Scale. Twelve articles met inclusion criteria, most of which were of poor methodological quality. The pooled estimate of incidence of exercise intolerance in participants with SRC equated to an estimated sensitivity of 94.4% (95% confidence interval [CI]: 90.8, 97.2). The pooled estimate of incidence of exercise intolerance in participants without SRC equated to an estimated specificity of 94.6% (95% CI: 91.1, 97.3). The results suggest that exercise intolerance measured on systematic testing within 2 weeks of SRC may have excellent sensitivity for helping to rule in the diagnosis of SRC and excellent specificity for helping to rule out SRC. A prospective validation study to determine the sensitivity and specificity of exercise intolerance on graded exertion testing for diagnosing SRC after head injury as the source of symptoms is warranted.
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Affiliation(s)
- Mohammad N Haider
- UBMD Department of Orthopaedics and Sports Medicine, Jacobs School of Medicine and Biomedical Sciences, State University of New York at Buffalo, Buffalo, New York, USA
- Concussion Management Clinic and Research Center, UBMD Orthopedics and Sports Medicine, Buffalo, New York, USA
| | - Ellen Lutnick
- UBMD Department of Orthopaedics and Sports Medicine, Jacobs School of Medicine and Biomedical Sciences, State University of New York at Buffalo, Buffalo, New York, USA
| | - Muhammad S Z Nazir
- Concussion Management Clinic and Research Center, UBMD Orthopedics and Sports Medicine, Buffalo, New York, USA
| | - Andrew Nowak
- College of Medicine, Central Michigan University, Mount Pleasant, Michigan, USA
| | - Haley M Chizuk
- Concussion Management Clinic and Research Center, UBMD Orthopedics and Sports Medicine, Buffalo, New York, USA
- Department of Rehabilitation Sciences, School of Public Health and Health Professions, State University of New York at Buffalo, Buffalo, New York, USA
| | - Jeffrey C Miecznikowski
- Department of Biostatistics, School of Public Health and Health Professions, State University of New York at Buffalo, Buffalo, New York, USA
| | - Jacob I McPherson
- Department of Rehabilitation Sciences, School of Public Health and Health Professions, State University of New York at Buffalo, Buffalo, New York, USA
| | - Barry S Willer
- Department of Psychiatry, Jacobs School of Medicine and Biomedical Sciences, State University of New York at Buffalo, Buffalo, New York, USA
| | - John J Leddy
- UBMD Department of Orthopaedics and Sports Medicine, Jacobs School of Medicine and Biomedical Sciences, State University of New York at Buffalo, Buffalo, New York, USA
- Concussion Management Clinic and Research Center, UBMD Orthopedics and Sports Medicine, Buffalo, New York, USA
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11
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Echemendia RJ, Burma JS, Bruce JM, Davis GA, Giza CC, Guskiewicz KM, Naidu D, Black AM, Broglio S, Kemp S, Patricios JS, Putukian M, Zemek R, Arango-Lasprilla JC, Bailey CM, Brett BL, Didehbani N, Gioia G, Herring SA, Howell D, Master CL, Valovich McLeod TC, Meehan WP, Premji Z, Salmon D, van Ierssel J, Bhathela N, Makdissi M, Walton SR, Kissick J, Pardini J, Schneider KJ. Acute evaluation of sport-related concussion and implications for the Sport Concussion Assessment Tool (SCAT6) for adults, adolescents and children: a systematic review. Br J Sports Med 2023; 57:722-735. [PMID: 37316213 DOI: 10.1136/bjsports-2022-106661] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/25/2023] [Indexed: 06/16/2023]
Abstract
OBJECTIVES To systematically review the scientific literature regarding the acute assessment of sport-related concussion (SRC) and provide recommendations for improving the Sport Concussion Assessment Tool (SCAT6). DATA SOURCES Systematic searches of seven databases from 2001 to 2022 using key words and controlled vocabulary relevant to concussion, sports, SCAT, and acute evaluation. ELIGIBILITY CRITERIA (1) Original research articles, cohort studies, case-control studies, and case series with a sample of >10; (2) ≥80% SRC; and (3) studies using a screening tool/technology to assess SRC acutely (<7 days), and/or studies containing psychometric/normative data for common tools used to assess SRC. DATA EXTRACTION Separate reviews were conducted involving six subdomains: Cognition, Balance/Postural Stability, Oculomotor/Cervical/Vestibular, Emerging Technologies, and Neurological Examination/Autonomic Dysfunction. Paediatric/Child studies were included in each subdomain. Risk of Bias and study quality were rated by coauthors using a modified SIGN (Scottish Intercollegiate Guidelines Network) tool. RESULTS Out of 12 192 articles screened, 612 were included (189 normative data and 423 SRC assessment studies). Of these, 183 focused on cognition, 126 balance/postural stability, 76 oculomotor/cervical/vestibular, 142 emerging technologies, 13 neurological examination/autonomic dysfunction, and 23 paediatric/child SCAT. The SCAT discriminates between concussed and non-concussed athletes within 72 hours of injury with diminishing utility up to 7 days post injury. Ceiling effects were apparent on the 5-word list learning and concentration subtests. More challenging tests, including the 10-word list, were recommended. Test-retest data revealed limitations in temporal stability. Studies primarily originated in North America with scant data on children. CONCLUSION Support exists for using the SCAT within the acute phase of injury. Maximal utility occurs within the first 72 hours and then diminishes up to 7 days after injury. The SCAT has limited utility as a return to play tool beyond 7 days. Empirical data are limited in pre-adolescents, women, sport type, geographical and culturally diverse populations and para athletes. PROSPERO REGISTRATION NUMBER CRD42020154787.
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Affiliation(s)
- Ruben J Echemendia
- Concussion Care Clinic, University Orthopedics, State College, Pennsylvania, USA
- University of Missouri Kansas City, Kansas City, Missouri, USA
| | - Joel S Burma
- Faculty of Kinesiology, University of Calgary, Calgary, Alberta, Canada
| | - Jared M Bruce
- Biomedical and Health Informatics, University of Missouri - Kansas City, Kansas City, Missouri, USA
| | - Gavin A Davis
- Murdoch Children's Research Institute, Parkville, Victoria, Australia
- Cabrini Health, Malvern, Victoria, Australia
| | - Christopher C Giza
- Neurosurgery, UCLA Steve Tisch BrainSPORT Program, Los Angeles, California, USA
- Pediatrics/Pediatric Neurology, Mattel Children's Hospital UCLA, Los Angeles, California, USA
| | - Kevin M Guskiewicz
- Matthew Gfeller Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Dhiren Naidu
- Medicine, University of Alberta, Edmonton, Alberta, Canada
| | | | - Steven Broglio
- Michigan Concussion Center, University of Michigan, Ann Arbor, Michigan, USA
| | - Simon Kemp
- Sports Medicine, Rugby Football Union, London, UK
| | - Jon S Patricios
- Wits Sport and Health (WiSH), School of Clinical Medicine, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg-Braamfontein, South Africa
| | | | - Roger Zemek
- Children's Hospital of Eastern Ontario Research Institute, Ottawa, Ontario, Canada
- Department of Pediatrics, University of Ottawa, Ottawa, Ontario, Canada
| | | | - Christopher M Bailey
- Neurology, University Hospitals Cleveland Medical Center, Cleveland, Ohio, USA
- Neurology, Case Western Reserve University School of Medicine, Cleveland, Ohio, USA
| | - Benjamin L Brett
- Neurosurgery/ Neurology, Medical College of Wisconsin, Milwaukee, Wisconsin, USA
| | | | - Gerry Gioia
- Depts of Pediatrics and Psychiatry & Behavioral Sciences, Children's National Health System, Washington, District of Columbia, USA
| | - Stanley A Herring
- Department of Rehabilitation Medicine, Orthopaedics and Sports Medicine, and Neurological Surgery, University of Washington, Seattle, Washington, USA
| | - David Howell
- Orthopedics, Sports Medicine Center, Children's Hospital Colorado, Aurora, Colorado, USA
| | | | - Tamara C Valovich McLeod
- Department of Athletic Training and School of Osteopathic Medicine in Arizona, A.T. Still University, Mesa, Arizona, USA
| | - William P Meehan
- Sports Medicine, Children's Hospital Boston, Boston, Massachusetts, USA
- Emergency Medicine, Children's Hospital Boston, Boston, Massachusetts, USA
| | - Zahra Premji
- Libraries, University of Victoria, Victoria, British Columbia, Canada
| | | | | | - Neil Bhathela
- UCLA Health Steve Tisch BrainSPORT Program, Los Angeles, California, USA
| | - Michael Makdissi
- Florey Institute of Neuroscience and Mental Health - Austin Campus, Heidelberg, Victoria, Australia
- La Trobe Sport and Exercise Medicine Research Centre, Melbourne, Victoria, Australia
| | - Samuel R Walton
- Department of Physical Medicine and Rehabilitation, School of Medicine, Richmond, Virginia, USA
| | - James Kissick
- Dept of Family Medicine, University of Ottawa, Ottawa, Ontario, Canada
| | - Jamie Pardini
- Departments of Internal Medicine and Neurology, University of Arizona College of Medicine, Phoenix, Arizona, USA
| | - Kathryn J Schneider
- Sport Injury Prevention Research Centre, Faculty of Kinesiology, University of Calgary, Calgary, Alberta, Canada
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12
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Mooney J, Cochrane GD, Gould S. Relationship Between Sensory Organization Testing Scores With Lower Extremity Injuries and Prior Concussion in Professional Soccer Players. Clin J Sport Med 2023; 33:246-251. [PMID: 36626305 PMCID: PMC10191870 DOI: 10.1097/jsm.0000000000001104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Accepted: 10/14/2022] [Indexed: 01/11/2023]
Abstract
OBJECTIVE To evaluate for associations between concussion history or lower extremity (LE) injury and computerized sensory organization testing (SOT) performance in professional soccer players. DESIGN Cross-sectional study. SETTING Tertiary care center. PARTICIPANTS Thirty-three, professional, male soccer players on an American club, between the years 2019 and 2021. ASSESSMENT OF RISK FACTORS Player age, history of reported LE injury (gluteal, hamstring, ankle, knee, hip, groin, and sports hernia), history of diagnosed concussion, and the number of prior concussions were documented for each player. MAIN OUTCOME MEASURES Baseline SOT of postural sway was conducted in 6 sensory conditions for all players. RESULTS Eleven athletes (33%) reported a previous concussion, and 15 (45%) reported a previous LE injury. There were no significant differences in SOT scores between those with and without a previous diagnosis of concussion ( P > 0.05). Those reporting a previous LE injury performed better on condition 3 (eyes open, unstable visual surround) than those who did not ( P = 0.03). Athletes aged 25 years or younger performed worse on condition 3 ( P = 0.01) and had worse, although not statistically significant, median performance on all other balance measures than those older than 25 years. Intraclass correlation coefficient for repeat SOT assessment was 0.58, indicating moderate reliability, without an evident practice effect. CONCLUSIONS Professional soccer players with a previous concussion or history of LE injury did not demonstrate long-term deficits in postural control, as assessed by multiyear computerized SOT baseline testing. The SOT was reliable over time with younger athletes exhibiting greater postural sway than older athletes.
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Affiliation(s)
- James Mooney
- Department of Neurosurgery, University of Alabama at Birmingham, AL
| | - Graham D. Cochrane
- NIH Medical Scientist Training Program, University of Alabama at Birmingham Heersink School of Medicine, UAB, Birmingham, AL, USA
| | - Sara Gould
- Department of Orthopedic Surgery, University of Alabama at Birmingham, AL
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13
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Neumann KD, Seshadri V, Thompson XD, Broshek DK, Druzgal J, Massey JC, Newman B, Reyes J, Simpson SR, McCauley KS, Patrie J, Stone JR, Kundu BK, Resch JE. Microglial activation persists beyond clinical recovery following sport concussion in collegiate athletes. Front Neurol 2023; 14:1127708. [PMID: 37034078 PMCID: PMC10080132 DOI: 10.3389/fneur.2023.1127708] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Accepted: 03/06/2023] [Indexed: 04/11/2023] Open
Abstract
Introduction In concussion, clinical and physiological recovery are increasingly recognized as diverging definitions. This study investigated whether central microglial activation persisted in participants with concussion after receiving an unrestricted return-to-play (uRTP) designation using [18F]DPA-714 PET, an in vivo marker of microglia activation. Methods Eight (5 M, 3 F) current athletes with concussion (Group 1) and 10 (5 M, 5 F) healthy collegiate students (Group 2) were enrolled. Group 1 completed a pre-injury (Visit1) screen, follow-up Visit2 within 24 h of a concussion diagnosis, and Visit3 at the time of uRTP. Healthy participants only completed assessments at Visit2 and Visit3. At Visit2, all participants completed a multidimensional battery of tests followed by a blood draw to determine genotype and study inclusion. At Visit3, participants completed a clinical battery of tests, brain MRI, and brain PET; no imaging tests were performed outside of Visit3. Results For Group 1, significant differences were observed between Visits 1 and 2 (p < 0.05) in ImPACT, SCAT5 and SOT performance, but not between Visit1 and Visit3 for standard clinical measures (all p > 0.05), reflecting clinical recovery. Despite achieving clinical recovery, PET imaging at Visit3 revealed consistently higher [18F]DPA-714 tracer distribution volume (VT) of Group 1 compared to Group 2 in 10 brain regions (p < 0.001) analyzed from 164 regions of the whole brain, most notably within the limbic system, dorsal striatum, and medial temporal lobe. No notable differences were observed between clinical measures and VT between Group 1 and Group 2 at Visit3. Discussion Our study is the first to demonstrate persisting microglial activation in active collegiate athletes who were diagnosed with a sport concussion and cleared for uRTP based on a clinical recovery.
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Affiliation(s)
- Kiel D Neumann
- Department of Diagnostic Imaging, St. Jude Children's Research Hospital, Memphis, TN, United States
- Department of Radiology and Medical Imaging, University of Virginia, Charlottesville, VA, United States
| | - Vikram Seshadri
- Department of Radiology and Medical Imaging, University of Virginia, Charlottesville, VA, United States
| | - Xavier D Thompson
- Department of Kinesiology, University of Virginia, Charlottesville, VA, United States
| | - Donna K Broshek
- Department of Psychiatry and Neurobehavioral Sciences, University of Virginia, Charlottesville, VA, United States
| | - Jason Druzgal
- Department of Radiology and Medical Imaging, University of Virginia, Charlottesville, VA, United States
| | - James C Massey
- Department of Radiology and Medical Imaging, University of Virginia, Charlottesville, VA, United States
| | - Benjamin Newman
- Department of Radiology and Medical Imaging, University of Virginia, Charlottesville, VA, United States
| | - Jose Reyes
- Department of Radiology and Medical Imaging, University of Virginia, Charlottesville, VA, United States
| | - Spenser R Simpson
- Department of Diagnostic Imaging, St. Jude Children's Research Hospital, Memphis, TN, United States
| | - Katelyenn S McCauley
- Department of Radiology and Medical Imaging, University of Virginia, Charlottesville, VA, United States
| | - James Patrie
- Department of Public Health Sciences, University of Virginia, Charlottesville, VA, United States
| | - James R Stone
- Department of Public Health Sciences, University of Virginia, Charlottesville, VA, United States
| | - Bijoy K Kundu
- Department of Radiology and Medical Imaging, University of Virginia, Charlottesville, VA, United States
- Department of Biomedical Engineering, University of Virginia, Charlottesville, VA, United States
| | - Jacob E Resch
- Department of Kinesiology, University of Virginia, Charlottesville, VA, United States
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14
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Lempke LB, Hoch MC, Call JA, Schmidt JD, Lynall RC. Lower Extremity Somatosensory Function Throughout Concussion Recovery: A Prospective Cohort Study. J Head Trauma Rehabil 2023; 38:E156-E166. [PMID: 35687895 DOI: 10.1097/htr.0000000000000805] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
OBJECTIVE Balance impairments may suggest somatosensory disruption beyond concussion clinical recovery, but somatosensory subsystems have never been directly assessed. Our objective was to examine somatosensory function between individuals with a concussion and healthy matched-controls at acute (<7 days) and asymptomatic (<72 hours of being symptom-free) time points. SETTING Laboratory. PARTICIPANTS Participants with a concussion and matched controls ( n = 24; 58% male, age: 19.3 ± 1.1 years, mass: 70.3 ± 16.4 kg, height: 177.3 ± 12.7 cm). DESIGN Prospective cohort. MAIN MEASURES Somatosensory assessments on the dominant limb at both time points included: (1) plantar touch sensation threshold via Semmes-Weinstein monofilaments, (2) plantar pressure pain threshold via algometry, and (3) knee absolute passive joint repositioning (PJR) error via Biodex across 3 arcs (105°-75°, 30°-60°, 90°-45° knee-flexion). We used mixed-model analyses of variance, post hoc Tukey honestly significant difference t tests with mean difference, 95% CI, and Hedges' g effect sizes to examine outcomes. RESULTS Touch sensation had a group effect with the concussion cohort needing 0.95 grams of force (gf) more relative to controls (95% CI: 0.03 to 1.87; P = .043). No touch sensation interaction was present, but medium and large effects were observed for greater gf needed among the concussed cohort at the acute (1.11 gf; 95% CI: 0.17 to 2.05; g = 0.96) and asymptomatic time points (0.79 gf; 95% CI: -0.15 to 1.73; g = 0.73). No plantar pressure pain threshold effects were observed ( P ≥ .311), with negligible pressure difference magnitudes at the acute (0.26 pound force [lbf]/cm 2 ; 95% CI: -1.54 to 2.06; g = 0.13) and medium magnitudes at the asymptomatic time points (0.99 lbf/cm 2 ; 95% CI: -0.81 to 2.80; g = 0.42) for the concussed cohort needing more pressure to detect pain. The 30° to 60° PJR had a time effect, with asymptomatic time point having 3.12° better accuracy (95% CI: 1.23° to 5.02; P = .002). The concussed cohort had small-to-medium magnitude differences relative to controls at the acute time point for PJR during 105° to 75° (0.89°; g = 0.30) and 90° to 45° (0.62°; g = 0.17), but not 30° to 60° (-1.75°; g = -0.40). CONCLUSIONS Individuals with a concussion exhibited large effects for diminished plantar touch sensation and small to medium effects for inhibited plantar pressure pain sensation compared with controls, which may indicate altered somatosensory function. Negligible PJR differences suggest knee joint position sense is not altered post-concussion. Pre- and postconcussion examination is warranted to understand causal somatosensory mechanisms.
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Affiliation(s)
- Landon B Lempke
- UGA Concussion Research Laboratory, University of Georgia, Athens (Drs Lempke, Schmidt, and Lynall); Department of Kinesiology, University of Georgia, Athens (Drs Lempke, Call, Schmidt, and Lynall); Division of Sports Medicine, Boston Children's Hospital, Boston, Massachusetts, and Micheli Center for Sports Injury Prevention, Waltham, Massachusetts (Dr Lempke); Sports Medicine Research Institute, University of Kentucky, Lexington (Dr Hoch); and Skeletal Muscle Dysfunction Laboratory, University of Georgia, Athens (Dr Call)
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15
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Kinesiophobia Is Related to Acute Musculoskeletal Injury Incidence Following Concussion. J Sport Rehabil 2023; 32:145-150. [PMID: 36049743 DOI: 10.1123/jsr.2022-0134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Revised: 06/22/2022] [Accepted: 06/23/2022] [Indexed: 02/07/2023]
Abstract
CONTEXT Athletes with a history of sport concussion (SC) have an increased risk of musculoskeletal injury (MSK); however, the underlying mechanisms have yet to be determined. The purpose of our study was to evaluate kinesiophobia in college athletes with or without a time-loss MSK within 180 days of unrestricted return to play following a SC. DESIGN This was a retrospective cohort study within a sports medicine facility. METHODS Participants were eligible if they were diagnosed with a SC, completed the Tampa Scale of Kinesiophobia (TSK), and completed an unrestricted return to play. Fifty-six college athletes (40 men and 16 women) with an average age of 19.5 (1.25) years, height of 183.5 (10.45) cm, and mass of 94.72 (24.65) kg, were included in the study. MSK participants were matched to non-MSK participants 1:1. Demographic and TSK outcome scores were compared using independent t tests. The proportion of participants in each group who scored above the clinical threshold (TSK ≥ 37) was compared using a chi-square analysis. Alpha was set at α = .05. RESULTS The MSK group (31.2 [6.30]) reported similar TSK scores to the matched group (28.9 [3.34]; t54 = 1.70, P = .10, d = 0.45 [-0.08 to 0.97]). A greater proportion of athletes who were diagnosed with an MSK-reported scores above the cutoff (χ2[1] = 6.49, P = .01). CONCLUSIONS Athletes diagnosed with SC had similar kinesiophobia values regardless of MSK status. However, a higher proportion of athletes with a time-loss MSK injury reported a TSK score greater than the clinical cutoff. Our results suggest that factors such as kinesiophobia should be considered following a SC.
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16
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Erdman NK, Kelshaw PM, Hacherl SL, Caswell SV. The Clinical Utility of the Child SCAT5 for Acute Concussion Assessment. SPORTS MEDICINE - OPEN 2022; 8:104. [PMID: 35962887 PMCID: PMC9375738 DOI: 10.1186/s40798-022-00499-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Accepted: 07/31/2022] [Indexed: 11/11/2022]
Abstract
Background The Child Sport Concussion Assessment Tool 5th Edition (Child SCAT5) was developed to evaluate children between 5 and 12 years of age for a suspected concussion. However, limited empirical evidence exists demonstrating the value of the Child SCAT5 for acute concussion assessment. Therefore, the purpose of our study was to examine differences and assess the diagnostic properties of Child SCAT5 scores among concussed and non-concussed middle school children on the same day as a suspected concussion. Methods Our participants included 34 concussed (21 boys, 13 girls; age = 12.8 ± 0.86 years) and 44 non-concussed (31 boys, 13 girls; age = 12.4 ± 0.76 years) middle school children who were administered the Child SCAT5 upon suspicion of a concussion. Child SCAT5 scores were calculated from the symptom evaluation (total symptoms, total severity), child version of the Standardized Assessment of Concussion (SAC-C), and modified Balance Error Scoring System (mBESS). The Child SCAT5 scores were compared between the concussed and non-concussed groups. Non-parametric effect sizes (\documentclass[12pt]{minimal}
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\begin{document}$$r=\frac{Z}{\sqrt{n}}$$\end{document}r=Zn) were calculated to assess the magnitude of difference for each comparison. The diagnostic properties (sensitivity, specificity, diagnostic accuracy, predictive values, likelihood ratios, and diagnostic odds ratio) of each Child SCAT5 score were also calculated.
Results Concussed children endorsed more symptoms (p < 0.001, \documentclass[12pt]{minimal}
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\begin{document}$$r$$\end{document}r=0.44), and had higher double leg (p = 0.046, \documentclass[12pt]{minimal}
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\begin{document}$$r$$\end{document}r=0.23), single leg (p = 0.035, \documentclass[12pt]{minimal}
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\begin{document}$$r$$\end{document}r=0.24), and total scores (p = 0.022, \documentclass[12pt]{minimal}
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\begin{document}$$r$$\end{document}r=0.26) for the mBESS than the non-concussed children. No significant differences were observed for the SAC-C scores (p’s ≥ 0.542). The quantity and severity of endorsed symptoms had the best diagnostic accuracy (AUC = 0.76–0.77), negative predictive values (NPV = 0.84–0.88), and negative likelihood ratios (-LR = 0.22–0.31) of the Child SCAT5 scores. Conclusions Clinicians should prioritize interpretation of the symptom evaluation form of the Child SCAT5 as it was the most effective component for differentiating between concussed and non-concussed middle school children on the same day as a suspected concussion.
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17
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Muir KJ, Donahue C, Broshek DK, Resch J, Solenski N, Laughon K. Neuropsychological and Balance Symptoms of Abused Women Who Have Experienced Intimate Partner Violence-Related Strangulation: A Feasibility and Acceptability Study. Neurotrauma Rep 2022; 3:491-500. [DOI: 10.1089/neur.2022.0047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- K. Jane Muir
- National Clinician Scholars Program, University of Pennsylvania School of Nursing, Philadelphia, Pennsylvania, USA
| | - Catherine Donahue
- School of Education and Human Development, University of Virginia, Charlottesville, Virginia, USA
| | - Donna K. Broshek
- School of Medicine, University of Virginia, Charlottesville, Virginia, USA
| | - Jacob Resch
- School of Education and Human Development, University of Virginia, Charlottesville, Virginia, USA
| | - Nina Solenski
- School of Medicine, University of Virginia, Charlottesville, Virginia, USA
| | - Kathryn Laughon
- School of Medicine, University of Virginia, Charlottesville, Virginia, USA
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Weiner AR, Durbin JR, Lunardi SR, Li AY, Hannah TC, Schupper AJ, Gal JS, Jumreornvong O, Spiera Z, Ali M, Marayati NF, Gometz A, Lovell MR, Choudhri TF. Incidence and Severity of Concussions Among Young Soccer Players Based on Age, Sex, and Player Position. Orthop J Sports Med 2022; 10:23259671211059216. [PMID: 35083358 PMCID: PMC8785311 DOI: 10.1177/23259671211059216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Accepted: 08/04/2021] [Indexed: 11/18/2022] Open
Abstract
Background: Previously studied risk factors for sports-related concussion in soccer players include sex, age, and player position. However, prior studies were limited in number, they reported conflicting results, and most did not assess initial concussion severity. Purpose/Hypothesis: The purpose of this study was to conduct an in-depth analysis of soccer players across key demographic groups (sex, age, position) for both concussion incidence and severity. It was hypothesized that concussion incidence and severity would be higher among male players, players aged ≥17 years, and goalkeepers. Study Design: Cohort study; Level of evidence, 3. Methods: The authors analyzed baseline and postinjury ImPACT (Immediate Post-Concussion Assessment and Cognitive Testing) scores for athletes aged 12 to 22 years between July 2009 and June 2019. Players were assigned to an age group based on when they had their most recent baseline test. Concussion incidence and concussion severity index were compared using t tests and multivariate logistic regression. Results: For 1189 individuals who reported soccer as their primary sport, 1032 contributed 1754 baseline ImPACT tests (some individuals had multiple baseline tests), whereas 445 individuals were suspected of sustaining a concussion and then referred for a postinjury 1 test. Of these players, 254 (24.6%) had both a baseline and a postinjury test and were analyzed for concussion severity. Linear regression showed that forwards had a lower incidence of ImPACT-proxied concussions than goalkeepers had (P = .008). Female players had a significantly higher incidence of ImPACT concussions compared with male players (mean, 0.07 [female] vs 0.04 [male] concussions per person-year; P = .05). Players in the ≥17-year age group had a higher incidence of ImPACT concussions than players in the 15- to 16-year age group (P = .04), although the 15- to 16-year age group had more severe concussions than the ≥17-year age group (mean severity index, 2.91 [age 15-16 years] vs 1.73 [age ≥17 years]; P = .001). Conclusion: Female soccer players experienced a higher incidence of concussion than did male players, and goalkeepers experienced a greater incidence of ImPACT concussions than did forwards. Players of both sexes and all positions in the 15- to 16-year age group showed increased initial concussion severity compared with the ≥17-year age group, despite a lower comparative incidence of ImPACT concussions. Further study is needed to understand whether sex and player position affect concussion severity.
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Affiliation(s)
- Alden R. Weiner
- Neurosurgery Department, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - John R. Durbin
- Neurosurgery Department, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | | | - Adam Y. Li
- Neurosurgery Department, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Theodore C. Hannah
- Neurosurgery Department, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Alexander J. Schupper
- Neurosurgery Department, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Jonathan S. Gal
- Department of Anesthesiology, Perioperative and Pain Medicine, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Oranicha Jumreornvong
- Neurosurgery Department, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Zachary Spiera
- Neurosurgery Department, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Muhammad Ali
- Neurosurgery Department, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Naoum Fares Marayati
- Neurosurgery Department, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Alex Gometz
- Concussion Management of New York, New York, New York, USA
| | - Mark R. Lovell
- Department of Neurology, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Tanvir F. Choudhri
- Neurosurgery Department, Icahn School of Medicine at Mount Sinai, New York, New York, USA
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19
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Concussion Baseline Retesting Is Necessary When Initial Scores Are Low. Clin J Sport Med 2022; 32:e40-e51. [PMID: 33239512 DOI: 10.1097/jsm.0000000000000872] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/05/2020] [Accepted: 05/30/2020] [Indexed: 02/02/2023]
Abstract
OBJECTIVE To determine whether (1) initial baseline scores are significantly better for those who have valid (initial valid) versus invalid scores (initial invalid) on their concussion baseline testing, (2) retesting results in significantly improved baseline scores, and (3) there is a significant difference in scores between those who have valid scores on their initial attempt and those who retook baseline tests (retest valid). DESIGN Prospective, repeated-measures. SETTING Two years of collegiate preparticipation concussion baseline testing. PARTICIPANTS Five hundred forty-seven male and female Division I collegiate athletes (19.02 ± 1.31 years, female = 217). INDEPENDENT VARIABLES Participants were divided into initial valid and initial invalid. The retest group was further divided into their initial (initial invalid) and final valid attempt (retest valid). MAIN OUTCOME MEASURES Data were analyzed to determine the relationship between the 3 groups and overall initial and final scores on 28 individual items: total symptoms score, coordination, near-point convergence, CNS Vital Signs (CNSVS), Senaptec Sensory Station, and Neurocom Sensory Organization Test (SOT). RESULTS The initial valid group scored significantly better than the initial invalid group on 8 CNSVS items and 5 Senaptec items (P < 0.002). The retest valid scores were significantly better compared with the initial invalid scores on 17 items (P < 0.002). CONCLUSIONS Retesting is recommended for individuals who score below acceptable ranges. This is important because athletes may experience a learning effect and are highly motivated during postinjury testing, so accurate baseline scores are imperative for athlete safety. Completion time for the coordination test may be a more informative option.
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Phybrata Sensors and Machine Learning for Enhanced Neurophysiological Diagnosis and Treatment. SENSORS 2021; 21:s21217417. [PMID: 34770729 PMCID: PMC8587627 DOI: 10.3390/s21217417] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Revised: 11/03/2021] [Accepted: 11/03/2021] [Indexed: 11/29/2022]
Abstract
Concussion injuries remain a significant public health challenge. A significant unmet clinical need remains for tools that allow related physiological impairments and longer-term health risks to be identified earlier, better quantified, and more easily monitored over time. We address this challenge by combining a head-mounted wearable inertial motion unit (IMU)-based physiological vibration acceleration (“phybrata”) sensor and several candidate machine learning (ML) models. The performance of this solution is assessed for both binary classification of concussion patients and multiclass predictions of specific concussion-related neurophysiological impairments. Results are compared with previously reported approaches to ML-based concussion diagnostics. Using phybrata data from a previously reported concussion study population, four different machine learning models (Support Vector Machine, Random Forest Classifier, Extreme Gradient Boost, and Convolutional Neural Network) are first investigated for binary classification of the test population as healthy vs. concussion (Use Case 1). Results are compared for two different data preprocessing pipelines, Time-Series Averaging (TSA) and Non-Time-Series Feature Extraction (NTS). Next, the three best-performing NTS models are compared in terms of their multiclass prediction performance for specific concussion-related impairments: vestibular, neurological, both (Use Case 2). For Use Case 1, the NTS model approach outperformed the TSA approach, with the two best algorithms achieving an F1 score of 0.94. For Use Case 2, the NTS Random Forest model achieved the best performance in the testing set, with an F1 score of 0.90, and identified a wider range of relevant phybrata signal features that contributed to impairment classification compared with manual feature inspection and statistical data analysis. The overall classification performance achieved in the present work exceeds previously reported approaches to ML-based concussion diagnostics using other data sources and ML models. This study also demonstrates the first combination of a wearable IMU-based sensor and ML model that enables both binary classification of concussion patients and multiclass predictions of specific concussion-related neurophysiological impairments.
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21
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Potential Mechanisms of Acute Standing Balance Deficits After Concussions and Subconcussive Head Impacts: A Review. Ann Biomed Eng 2021; 49:2693-2715. [PMID: 34258718 DOI: 10.1007/s10439-021-02831-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Accepted: 06/29/2021] [Indexed: 01/04/2023]
Abstract
Standing balance deficits are prevalent after concussions and have also been reported after subconcussive head impacts. However, the mechanisms underlying such deficits are not fully understood. The objective of this review is to consolidate evidence linking head impact biomechanics to standing balance deficits. Mechanical energy transferred to the head during impacts may deform neural and sensory components involved in the control of standing balance. From our review of acute balance-related changes, concussions frequently resulted in increased magnitude but reduced complexity of postural sway, while subconcussive studies showed inconsistent outcomes. Although vestibular and visual symptoms are common, potential injury to these sensors and their neural pathways are often neglected in biomechanics analyses. While current evidence implies a link between tissue deformations in deep brain regions including the brainstem and common post-concussion balance-related deficits, this link has not been adequately investigated. Key limitations in current studies include inadequate balance sampling duration, varying test time points, and lack of head impact biomechanics measurements. Future investigations should also employ targeted quantitative methods to probe the sensorimotor and neural components underlying balance control. A deeper understanding of the specific injury mechanisms will inform diagnosis and management of balance deficits after concussions and subconcussive head impact exposure.
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22
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Thompson XD, Erdman NK, Walton SR, Broshek DK, Resch JE. Reevaluating clinical assessment outcomes after unrestricted return to play following sport-related concussion. Brain Inj 2021; 35:1577-1584. [PMID: 34543089 DOI: 10.1080/02699052.2021.1975818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
PRIMARY OBJECTIVE The objective of this study was to examine neurocognition, postural control, and symptomology at multiple timepoints following concussion. We hypothesized that collegiate athletes would perform similar to or better than their baseline in terms of each outcome at both timepoints. RESEARCH DESIGN This was a retrospective study of 71 collegiate athletes (18.3 ± 0.89 years old; 182.2 ± 10.05 cm; 84.2 ± 20.07 kg) to observe changes in outcomes from a previously established clinical protocol. METHODS AND PROCEDURES Participants were administered ImPACT™, the Sensory Organization Test (SOT), and the revised head injury scale (HIS-r) prior to their seasons (baseline); upon reporting symptom-free following concussion (post-injury); and approximately 8-months after return-to-play to establish a new baseline. MAIN OUTCOMES AND RESULTS There were no changes in ImPACT scores or HIS-r reporting over time. ImPACT total symptom score (TSS) decreased over time (p = .002, ηp2 = 0.08). Significant main effects occurred for the SOT equilibrium score (p < .01, ηp2 = 0.34) and Vestibular sensory ratio (p < .001, ηp2 = 0.22). CONCLUSIONS Our data suggest no decline in neurocognition, balance, or symptom burden approximately eight months post-injury. As clinicians continue to explore "best practices" for concussion management and potential long-term implications of these injuries it is important to monitor outcome measures longitudinally.
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Affiliation(s)
- Xavier D Thompson
- UVA Department of Kinesiology, The University of Virginia, Charlottesville, Virginia, USA
| | - Nicholas K Erdman
- Postdoctoral Research Fellow, George Mason University Sports Medicine, Research and Testing Lab, Fairfax, Virginia, USA
| | - Samuel R Walton
- Postdoctoral Research Associate, UNC Center for the Study of Retired Athletes & Matthew Gfeller Sport-Related Traumatic Brain Injury Research Center, Chapel Hill, North Carolina, USA
| | - Donna K Broshek
- UVA Department of Psychiatry and Neurobehavioral Sciences, UVA Health, Charlottesville, Virginia, USA
| | - Jacob E Resch
- UVA Department of Kinesiology, The University of Virginia, Charlottesville, Virginia, USA
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23
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Walton SR, Kranz S, Malin SK, Broshek DK, Hertel J, Resch JE. Factors Associated With Energy Expenditure and Energy Balance in Acute Sport-Related Concussion. J Athl Train 2021; 56:860-868. [PMID: 33150378 PMCID: PMC8359710 DOI: 10.4085/359-20] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
CONTEXT Sport-related concussion (SRC) is characterized by a pathologic neurometabolic cascade that results in an increased intracranial energy demand and a decreased energy supply. Little is known about the whole-body energy-related effects of SRC. OBJECTIVE To examine factors associated with whole-body resting metabolic rate (RMR), total energy expenditure (TEE), energy consumption (EC), and energy balance (EBal) in student-athletes acutely after SRC and healthy matched control individuals. DESIGN Case-control study. SETTING University research laboratory. PATIENTS OR OTHER PARTICIPANTS Student-athletes diagnosed with SRC (n = 28, 50% female, age = 18.4 ± 1.8 years, body mass index [BMI] = 24.1 ± 4.1 kg/m2) assessed ≤72 hours postinjury and a matched control group (n = 28, 50% female, age = 19.4 ± 2.9 years, BMI = 24.7 ± 4.78 kg/m2). MAIN OUTCOME MEASURE(S) Resting metabolic rate was measured via indirect calorimetry. Participants reported their physical activity and dietary intake for 3 days, which we used to estimate TEE and EC, respectively, and to calculate EBal (EC:TEE ratio). Resting metabolic rate, TEE, and EC were normalized to body mass. Group and group-by-sex comparisons were conducted for RMR·kg-1, TEE·kg-1, EC·kg-1, and EBal using independent t tests with the a priori α = .05. Associations of age, sex, concussion history, BMI, and symptom burden with RMR·kg-1 and EBal were explored with linear regression models. RESULTS Total energy expenditure·kg-1 was lower (P < .01; mean difference ± SD = -5.31 ± 1.41 kcal·kg-1) and EBal was higher (P < .01; 0.28 ± 0.10) in SRC participants than in control participants. Both sexes with SRC had lower TEE·kg-1 than did the control participants (P values ≤ .04); females with SRC had higher EBal than controls (P = .01), but male groups did not differ. Higher RMR·kg-1 was associated with history of concussion (adjusted R2 = .10, β = 0.65). Younger age (β = -0.35), fewer concussions (β = -0.35), lower BMI (β = -0.32), greater symptom duration (β = 1.50), and lower symptom severity (β = -1.59) were associated with higher EBal (adjusted R2 = .54). CONCLUSIONS Total energy expenditure·kg-1 and EBal appeared to be affected by acute SRC, despite no differences in RMR·kg-1. Sex, concussion history, BMI, and symptom burden were associated with acute energy-related outcomes.
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Affiliation(s)
- Samuel Richard Walton
- Department of Exercise and Sport Science, University of North Carolina at Chapel Hill
| | - Sibylle Kranz
- Department of Kinesiology, University of Virginia, Charlottesville
| | | | - Donna K. Broshek
- Neurocognitive Assessment Lab, University of Virginia Medical School, Charlottesville
| | - Jay Hertel
- Department of Kinesiology, University of Virginia, Charlottesville
| | - Jacob Earl Resch
- Department of Kinesiology, University of Virginia, Charlottesville
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24
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McGowan AL, Bretzin AC, Anderson M, Pontifex MB, Covassin T. Paired cognitive flexibility task with symptom factors improves detection of sports-related concussion in high school and collegiate athletes. J Neurol Sci 2021; 428:117575. [PMID: 34304023 DOI: 10.1016/j.jns.2021.117575] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 06/24/2021] [Accepted: 07/08/2021] [Indexed: 11/18/2022]
Abstract
Determining the sensitivity and specificity of short neurocognitive assessments to objectively detect concussion will help clinicians more confidently integrate such tools in clinical management decisions. This study quantified the sensitivity and specificity of a computerized cognitive flexibility task isolating shifts of visuospatial attention in combination with clinical symptoms acutely (< 72 h) following concussion. A total of 100 athletes (53 concussed; 47 non-injured control; 42% female) completed computerized neurocognitive testing and clinical symptom reports (Sport Concussion Assessment Tool 3rd edition: SCAT3). Separate discriminant function analyses were performed for individual, combination, and stepwise inclusion of neurocognitive and clinical symptomology assessments. Findings revealed the combination of neurocognitive outcomes (i.e., mean reaction time, response accuracy, and response accuracy cost) with clinical symptom factor scores exhibited the greatest sensitivity (95.7%) and specificity (88.7%) as well as the highest positive predictive value (95.9%) and negative predictive value (88%) relative to other approaches. Further, a stepwise approach predicting concussion status using the discriminant functions improved detection of concussion (98.2% sensitivity, 95.7% specificity, 96.4% positive predictive value, and 97.8% negative predictive value) when clinical symptom factors failed to indicate the presence of a concussion. Incorporating a cognitive flexibility task involving shifts of visuospatial attention combined with clinical symptom factor scores may improve clinical decision-making as this approach exceeds the sensitivity and specificity of widely popular neurocognitive test batteries and takes less than 10 min to administer.
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Affiliation(s)
- Amanda L McGowan
- Addiction, Health, and Adolescence Lab, Annenberg School for Communication, University of Pennsylvania, Philadelphia, PA, United States of America.
| | - Abigail C Bretzin
- Penn Injury Science Center, Department of Biostatistics, Epidemiology and Informatics, University of Pennsylvania, Philadelphia, PA, United States of America
| | - Morgan Anderson
- Department of Kinesiology, Michigan State University, East Lansing, MI, United States of America
| | - Matthew B Pontifex
- Department of Kinesiology, Michigan State University, East Lansing, MI, United States of America
| | - Tracey Covassin
- Department of Kinesiology, Michigan State University, East Lansing, MI, United States of America
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25
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Optimizing Order of Administration for Concussion Baseline Assessment Among NCAA Student-Athletes and Military Cadets. Sports Med 2021; 52:165-176. [PMID: 34129221 DOI: 10.1007/s40279-021-01493-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/26/2021] [Indexed: 10/21/2022]
Abstract
BACKGROUND Concussion pre-injury (i.e., baseline) assessments serve as a benchmark comparison point in the event an individual sustains a concussion and allows clinicians to compare to post-injury measures. However, baseline assessments must reflect the individual's true and most optimized performance to serve as a useful comparison. Mental fatigue and motivation throughout baseline testing may alter individual assessment performance, indicating an order of administration (OoA) may play an influential role in assessment outcomes. OBJECTIVE To examine the influence concussion baseline battery OoA has on symptom, postural stability, cognitive screening, and computerized neurocognitive test outcomes. METHODS We employed a retrospective observational cohort study to examine healthy collegiate student-athletes and military cadets (n = 2898, 19.0 ± 1.4 years, 66.1% male, 75.6% white, 54.4% Division-I) baseline assessment performance on the Sport Concussion Assessment Tool (SCAT; total symptom number and severity), Balance Error Scoring System (BESS; total error scores), Standardized Assessment of Concussion (SAC; total score), and Immediate Post-Concussion Assessment and Cognitive Testing (ImPACT) domain scores (verbal and visual memory, visual-motor speed, reaction time). Assessments were binned to beginning, middle, or end tertiles based upon OoA. We used one-way ANOVAs with Tukey post-hoc t tests, 95% confidence intervals (CI), and Cohen's d effect sizes for significant models (α = 0.05). RESULTS SCAT total symptom number (mean difference = 2.23; 95% CI 1.76-2.70; d = 0.49, p < 0.001) and severity (mean difference = 5.58; 95% CI 4.42-6.74; d = 0.50; p < 0.001) were lower when completed at the end of baseline testing compared to the middle. Total BESS errors were 1.06 lower when completed at the middle relative to the end (95% CI 0.43-1.69; d = 0.17; p = 0.001). Total SAC scores were better at the beginning relative to middle (mean difference = 0.58; 95% CI 0.25-0.90; d = 0.33; p < 0.001) and end (mean difference = 0.44; 95% CI 0.16-0.73; d = 0.24; p = 0.001). Verbal memory, visual memory, and reaction time performance were highest at the beginning (p ≤ 0.002), while visual-motor speed performance was highest at the middle (p = 0.001). CONCLUSION Completing baseline assessments in the order of (1) ImPACT, (2) SAC, (3) BESS, and (4) SCAT symptom checklist may improve performance across assessments collectively. Clinicians and researchers should consider completing baseline assessments in this order when possible to potentially aid in optimizing concussion baseline assessment performance and maximize post-concussion comparisons.
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26
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Kelley AM, Bernhardt K, Hass N, Rooks T. Detecting functional deficits following sub-concussive head impacts: the relationship between head impact kinematics and visual-vestibular balance performance. Brain Inj 2021; 35:812-820. [PMID: 34053379 DOI: 10.1080/02699052.2021.1927182] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Introduction: Mild traumatic brain injury (mTBI) continues to be a significant issue facing the US military. While TBI cases in deployed environments are of significant concern, an estimated 80% of diagnoses occur in garrison settings (e.g., military training).Objective: With the aim of improving the detection of potentially concussive exposures, the objective of this study was to evaluate the relationships between head impact kinematics and performance on a visual-vestibular balance task.Methods: Participants (n = 51) were enrolled in the Basic Airborne Training Course. Two sensors to measure head impacts sustained were worn. Performance was measured at four time points: baseline and at the end of each week of the course.Results: Visual-vestibular balance task performance tended to decrease over the course of airborne training for our participants, however, limited to the most challenging levels of the task. Also, head impact kinematic measures correlated with performance outcomes to suggest that worse performance was associated with greater number of impacts and greater linear and rotational acceleration and rotational velocity.Discussion: Our findings suggest that visual-vestibular balance task performance may be a useful measure for detection of sub-concussive impacts and that wearable sensors may provide useful data on head impact kinematics that relates directly to functionally relevant performance.
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Affiliation(s)
- Amanda M Kelley
- U.S. Army Aeromedical Research Laboratory, Fort Rucker, Alabama, USA
| | - Kyle Bernhardt
- U.S. Army Aeromedical Research Laboratory, Fort Rucker, Alabama, USA.,Oak Ridge Institute for Science and Education, Oak Ridge, Tennessee, USA
| | - Norah Hass
- U.S. Army Aeromedical Research Laboratory, Fort Rucker, Alabama, USA.,Oak Ridge Institute for Science and Education, Oak Ridge, Tennessee, USA
| | - Tyler Rooks
- U.S. Army Aeromedical Research Laboratory, Fort Rucker, Alabama, USA
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27
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Harmon KG, Whelan BM, Aukerman DF, Bohr AD, Nerrie JM, Elkinton HA, Holliday M, Poddar SK, Chrisman SPD, McQueen MB. Diagnostic accuracy and reliability of sideline concussion evaluation: a prospective, case-controlled study in college athletes comparing newer tools and established tests. Br J Sports Med 2021; 56:144-150. [PMID: 33883170 DOI: 10.1136/bjsports-2020-103840] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/04/2021] [Indexed: 11/04/2022]
Abstract
OBJECTIVE To assess diagnostic accuracy and reliability of sideline concussion tests in college athletes. METHODS Athletes completed baseline concussion tests including Post-Concussion Symptom Scale, Standardised Assessment of Concussion (SAC), modified Balance Error Scoring System (m-BESS), King-Devick test and EYE-SYNC Smooth Pursuits. Testing was repeated in athletes diagnosed acutely with concussion and compared to a matched teammate without concussion. RESULTS Data were collected on 41 concussed athletes and 41 matched controls. Test-retest reliability for symptom score and symptom severity assessed using control athletes was 0.09 (-0.70 to 0.88) and 0.08 (-1.00 to 1.00) (unweighted kappa). Intraclass correlations were SAC 0.33 (-0.02 to 0.61), m-BESS 0.33 (-0.2 to 0.60), EYE-SYNC Smooth Pursuit tangential variability 0.70 (0.50 to 0.83), radial variability 0.47 (0.19 to 0.69) and King-Devick test 0.71 (0.49 to 0.84). The maximum identified sensitivity/specificity of each test for predicting clinical concussion diagnosis was: symptom score 81%/94% (3-point increase), symptom severity score 91%/81% (3-point increase), SAC 44%/72% (2-point decline), m-BESS 40%/92% (5-point increase), King-Devick 85%/76% (any increase in time) and EYE-SYNC Smooth Pursuit tangential variability 48%/58% and radial variability 52%/61% (any increase). Adjusted area under the curve was: symptom score 0.95 (0.89, 0.99), symptom severity 0.95 (95% CI 0.88 to 0.99), SAC 0.66 (95% CI 0.54 to 0.79), m-BESS 0.71 (0.60, 0.83), King-Devick 0.78 (0.69, 0.87), radial variability 0.47 (0.34, 0.59), tangential variability 0.41 (0.30, 0.54) CONCLUSION: Test-retest reliability of most sideline concussion tests was poor in uninjured athletes, raising concern about the accuracy of these tests to detect new concussion. Symptom score/severity had the greatest sensitivity and specificity, and of the objective tests, the King-Devick test performed best.
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Affiliation(s)
| | - Bridget M Whelan
- Family Medicine, University of Washington, Seattle, Washington, USA
| | - Douglas F Aukerman
- Department of Family Medicine, Oregon State University, Corvallis, Oregon, USA
| | - Adam D Bohr
- Department of Integrative Physiology, University of Colorado Boulder, Boulder, Colorado, USA
| | - J Matthew Nerrie
- Intercollegiate Athletics, University of Washington, Seattle, Washington, USA
| | - Heather A Elkinton
- Intercollegiate Athletics, Oregon State University, Corvallis, Oregon, USA
| | - Marissa Holliday
- Intercollegiate Athletics, University of Colorado Boulder, Boulder, Colorado, USA
| | - Sourav K Poddar
- Department of Family Medicine, University of Colorado - Anschutz Medical Campus, Aurora, Colorado, USA
| | - Sara P D Chrisman
- Center for Child Health, Behavior and Development, Seattle Children's Research Institute, Seattle, Washington, USA.,Harborview Injury Prevention and Research Center, Seattle, Washington, USA
| | - Matthew B McQueen
- Department of Integrative Physiology, University of Colorado Boulder, Boulder, Colorado, USA
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28
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Garcia GGP, Schumb CM, Lavieri MS, Koffijberg H, McAllister TW, McCrea MA, Broglio SP. Developing Insights for Possible and Probable Acute Concussions Using Cluster Analysis. J Neurotrauma 2021; 39:102-113. [PMID: 33677994 DOI: 10.1089/neu.2020.7399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Few studies have analyzed the Sport Concussion Assessment Tool's (SCAT) utility among athletes whose concussion assessment is challenging. Using a previously published algorithm, we identified possible and probable concussions at <6 h (n = 393 males, n = 265 females) and 24-48 h (n = 323 males, n = 236 females) post-injury within collegiate student-athletes and cadets from the Concussion Assessment, Research, and Education (CARE) Consortium. We applied cluster analysis to characterize performance on the Standard Assessment of Concussion (SAC), Balance Error Scoring System (BESS), and the SCAT symptom checklist for these athletes. Among the cluster sets that best separated acute concussions and normal performances, total symptom number raw score and change and post-traumatic migraine raw score and change score were the most frequent clustering variables across males and females at <6 h and 24-48 h. Similarly, total symptom number raw score and change score and post-traumatic migraine raw score and change score were most significantly different between clusters for males and females at <6 h and 24-48 h. Our results suggest that clinicians should focus on total symptom number, post-traumatic migraine symptoms, and cognitive-fatigue symptoms when assessing possible and probable concussions, followed by the SAC and BESS scores.
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Affiliation(s)
- Gian-Gabriel P Garcia
- MGH Institute for Technology Assessment, Harvard Medical School, Boston, Massachusetts, USA
| | - Caroline M Schumb
- Department of Industrial and Operations Engineering, University of Michigan, Ann Arbor, Michigan, USA
| | - Mariel S Lavieri
- Department of Industrial and Operations Engineering, University of Michigan, Ann Arbor, Michigan, USA
| | - Hendrik Koffijberg
- Department of Health Technology and Services Research, Technical Medical Centre, University of Twente, Enschede, the Netherlands
| | - Thomas W McAllister
- Department of Psychiatry, Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Michael A McCrea
- Departments of Neurosurgery and Neurology, Medical College of Wisconsin, Milwaukee, Wisconsin, USA
| | - Steven P Broglio
- Michigan Concussion Center, University of Michigan, Ann Arbor, Michigan, USA
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Jacquin AE, Bazarian JJ, Casa DJ, Elbin RJ, Hotz G, Schnyer DM, Yeargin S, Prichep LS, Covassin T. Concussion assessment potentially aided by use of an objective multimodal concussion index. JOURNAL OF CONCUSSION 2021. [DOI: 10.1177/20597002211004333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Objective Prompt, accurate, objective assessment of concussion is crucial as delays can lead to increased short and long-term consequences. The purpose of this study was to derive an objective multimodal concussion index (CI) using EEG at its core, to identify concussion, and to assess change over time throughout recovery. Methods Male and female concussed ( N = 232) and control ( N = 206) subjects 13–25 years were enrolled at 12 US colleges and high schools. Evaluations occurred within 72 h of injury, 5 days post-injury, at return-to-play (RTP), 45 days after RTP (RTP + 45); and included EEG, neurocognitive performance, and standard concussion assessments. Concussed subjects had a witnessed head impact, were removed from play for ≥ 5 days using site guidelines, and were divided into those with RTP < 14 or ≥14 days. Part 1 describes the derivation and efficacy of the machine learning derived classifier as a marker of concussion. Part 2 describes significance of differences in CI between groups at each time point and within each group across time points. Results Sensitivity = 84.9%, specificity = 76.0%, and AUC = 0.89 were obtained on a test Hold-Out group representing 20% of the total dataset. EEG features reflecting connectivity between brain regions contributed most to the CI. CI was stable over time in controls. Significant differences in CI between controls and concussed subjects were found at time of injury, with no significant differences at RTP and RTP + 45. Within the concussed, differences in rate of recovery were seen. Conclusions The CI was shown to have high accuracy as a marker of likelihood of concussion. Stability of CI in controls supports reliable interpretation of CI change in concussed subjects. Objective identification of the presence of concussion and assessment of readiness to return to normal activity can be aided by use of the CI, a rapidly obtained, point of care assessment tool.
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Affiliation(s)
| | - Jeffrey J Bazarian
- Department of Emergency Medicine, University of Rochester, Rochester, NY, USA
| | - Douglas J Casa
- Department of Kinesiology, Korey Stringer Institute, University of Connecticut, Storrs, CT, USA
| | - Robert J Elbin
- Department of Health, Human Performance and Recreation, Office for Sport Concussion Research, University of Arkansas, Fayetteville, AR, USA
| | - Gillian Hotz
- Department of Neurosurgery, University of Miami Miller School of Medicine, Miami, FL, USA
| | - David M Schnyer
- Department of Psychology, University of Texas at Austin, Austin, TX, USA
| | - Susan Yeargin
- Department of Exercise Science, Arnold School of Public Health, University of South Carolina, Columbia, SC, USA
| | | | - Tracey Covassin
- Department of Kinesiology, Michigan State University, East Lansing, MI, USA
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Walton SR, Broshek DK, Kranz S, Malin SK, Hertel J, Resch JE. Mood, Psychological, and Behavioral Factors of Health-Related Quality of Life Throughout Recovery From Sport Concussion. J Head Trauma Rehabil 2021; 36:128-136. [PMID: 32769824 DOI: 10.1097/htr.0000000000000604] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVE To measure alterations in mood, psychological, and behavioral factors in collegiate athletes throughout recovery from sport concussion (SC) compared with matched controls. SETTING University research laboratory. PARTICIPANTS Twenty (55% female) division I collegiate athletes with SC (19.3 ± 1.08 years old, 1.77 ± 0.11 m, 79.6 ± 23.37 kg) and 20 (55% female) uninjured matched controls (20.8 ± 2.17 years old, 1.77 ± 0.10 m, 81.9 ± 23.45 kg). DESIGN Longitudinal case control. MAIN MEASURES Self-reported concussion-related symptoms, anxiety, resilience, stigma, sleep disturbance, fatigue, and appetite were assessed at 3 time points in the SC group: T1 (≤72 hours of SC), T2 (7 days after T1), and TF (after symptom resolution). Control participants were evaluated at similar intervals. Group and group-by-sex differences were assessed using repeated-measures analyses of variance. Post hoc analyses were performed with Tukey's honestly significant difference (HSD) and paired-sample t tests. RESULTS The SC group had greater sleep disturbance than controls at T1 (P = .001; d = 1.21) and endorsed greater stigma at all time points (P ≤ .03; d ≥ 0.80). Stigma (F(2) = 3.68; P = 0.03; η2p = 0.12), sleep disturbance (F(2) = 5.27; P = .008; η2p = 0.15), and fatigue (F(2) = 3.46; P = .04; η2p = 0.11) improved throughout recovery in those with SC only. No differences were observed between males and females (P > .05). CONCLUSION Sleep disturbance and stigma were negatively affected by SC, highlighting potential areas for clinical interventions to maximize recovery in males and females.
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Affiliation(s)
- Samuel R Walton
- Exercise and Sport Science Work, University of North Carolina at Chapel Hill
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Lempke LB, Lynall RC, Hoffman NL, Devos H, Schmidt JD. Slowed driving-reaction time following concussion-symptom resolution. JOURNAL OF SPORT AND HEALTH SCIENCE 2021; 10:145-153. [PMID: 32961301 PMCID: PMC7987557 DOI: 10.1016/j.jshs.2020.09.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2020] [Revised: 07/09/2020] [Accepted: 08/21/2020] [Indexed: 05/31/2023]
Abstract
BACKGROUND Concussed patients have impaired reaction time (RT) and cognition following injury that may linger and impair driving performance. Limited research has used direct methods to assess driving-RT post-concussion. Our study compared driving RT during simulated scenarios between concussed and control individuals and examined driving-RT's relationship with traditional computerized neurocognitive testing (CNT) domains. METHODS We employed a cross-sectional study among 14 concussed (15.9 ± 9.8 days post-concussion, mean ± SD) individuals and 14 healthy controls matched for age, sex, and driving experience. Participants completed a driving simulator and CNT (CNS Vital Signs) assessment within 48 h of symptom resolution. A driving-RT composite (ms) was derived from 3 simulated driving scenarios: stoplight (green to yellow), evasion (avoiding approaching vehicle), and pedestrian (person running in front of vehicle). The CNT domains included verbal and visual memory; CNT-RT (simple-, complex-, Stroop-RT individually); simple and complex attention; motor, psychomotor, and processing speed; executive function; and cognitive flexibility. Independent t tests and Hedge d effect sizes assessed driving-RT differences between groups, Pearson correlations (r) examined driving RT and CNT domain relationships among cohorts separately, and p values were controlled for false discovery rate via Benjamini-Hochberg procedures (α = 0.05). RESULTS Concussed participants demonstrated slower driving-RT composite scores than controls (mean difference = 292.86 ms; 95% confidence interval (95%CI): 70.18-515.54; p = 0.023; d = 0.992). Evasion-RT (p = 0.054; d = 0.806), pedestrian-RT (p = 0.258; d = 0.312), and stoplight-RT (p = 0.292; d = 0.585) outcomes were not statistically significant after false-discovery rate corrections but demonstrated medium to large effect sizes for concussed deficits. Among concussed individuals, driving-RT outcomes did not significantly correlate with CNT domains (r-range: -0.51 to 0.55; p > 0.05). No correlations existed between driving-RT outcomes and CNT domains among control participants either (r-range: -0.52 to 0.72; p > 0.05). CONCLUSION Slowed driving-RT composite scores and large effect sizes among concussed individuals when asymptomatic signify lingering impairment and raise driving-safety concerns. Driving-RT and CNT-RT measures correlated moderately but not statistically, which indicates that CNT-RT is not an optimal surrogate for driving RT.
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Affiliation(s)
- Landon B Lempke
- UGA Concussion Research Laboratory, Department of Kinesiology, University of Georgia, Athens, GA 30602, USA
| | - Robert C Lynall
- UGA Concussion Research Laboratory, Department of Kinesiology, University of Georgia, Athens, GA 30602, USA
| | - Nicole L Hoffman
- School of Kinesiology and Recreation, Illinois State University, Normal, IL 61790, USA
| | - Hannes Devos
- Laboratory for Advanced Rehabilitation Research in Simulation, Department of Physical Therapy and Rehabilitation Science, University of Kansas Medical Center, Kansas City, KS 66160, USA
| | - Julianne D Schmidt
- UGA Concussion Research Laboratory, Department of Kinesiology, University of Georgia, Athens, GA 30602, USA.
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Lempke LB, Howell DR, Eckner JT, Lynall RC. Examination of Reaction Time Deficits Following Concussion: A Systematic Review and Meta-analysis. Sports Med 2021; 50:1341-1359. [PMID: 32162242 DOI: 10.1007/s40279-020-01281-0] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
BACKGROUND Reaction time (RT) deficits are reported following concussion, but it is unknown when these deficits normalize to pre-injury status. It is also unclear how factors such as RT measurement technique and participant characteristics influence post-concussion RT. OBJECTIVE The purpose of this systematic review and meta-analysis was to (1) characterize acute post-concussion (0-3 days) RT impairments, (2) examine RT recovery over time, and (3) explore moderating factors related to acute RT impairment following concussion. METHODS Database searches (PubMed, CINAHL, EBSCOhost) were conducted according to PRISMA guidelines for articles published in English from January 2002 to March 2019. Studies compared baseline-to-post-injury RT within individuals (within-subject) and/or RT in concussed individuals to non-concussed controls (between-subject). Sixty studies met inclusion criteria, reporting on a total of 9688 participants with 214 discrete RT effects (Hedges' d; between-subject: N = 29, k = 129; within-subject: N = 42, k = 85). Of the 214 effects, 93 occurred in the acute (0-3 days) post-injury timeframe (k = 47 between-subject). Numerous demographic [sex, age, concussion history, population type (athlete, military, and general population), athlete level (high school, college), and sport], and method-based (RT test and measure type, computerized neurocognitive testing platform, concussion definition, and time post-injury) moderators were examined for mean effect influence. Mixed-effects multi-level modeling with restricted-maximum-likelihood estimation was used to account for nested effects and high heterogeneity for the pooled effect size (D+). RESULTS Significant medium-magnitude RT deficits were observed acutely for between- (D+ = - 0.7279, 95% CI - 0.9919, - 0.4639, I2 = 88.66, p < 0.0001) and within-subject (D+ = - 0.7472, 95% CI - 0.9089, - 0.5855, I2 = 89.21, p < 0.0001) effect models. RT deficits were present at the sub-acute and intermediate-term timeframes for between-subject effects (sub-acute: D+ = - 0.5655, 95% CI - 0.6958, - 0.4352, p < 0.0001; intermediate-term: D+ = - 0.3219, 95% CI - 0.5988, - 0.0450, p = 0.0245). No significant RT mean effect was observed for the between-subject model at the long-term timeframe, indicating RT recovery among concussed participants relative to controls (D+ = 0.3505, 95% CI - 0.4787, 1.1797, p = 0.3639). Sex was a significant moderator for between-subject effects, with every 1% male sample size increase demonstrating - 0.0171 (95% CI - 0.0312, - 0.0029, p = 0.0193) larger RT deficits. Within-subject effect models resulted in RT measure type (simple: [D+ = - 0.9826] vs. mixed: [D+ = - 0.6557], p = 0.0438) and computerized neurocognitive testing platforms (ANAM: [D+ = - 0.3735] vs. HeadMinder CRI: [D+ = - 1.4799] vs. ImPACT: [D+ = - 0.6749], p = 0.0004) having significantly different RT-deficit magnitudes. No other moderators produced significantly different RT-deficit magnitudes (between-subject: [p ≥ 0.0763], within-subject: [p ≥ 0.1723]). CONCLUSIONS Robust RT deficits were observed acutely following concussion. Minimal magnitude differences were noted when comparing between- and within-subject effects, suggesting that pre-injury baselines may not add clinical value in determining post-injury RT impairment. RT deficits persisted up till the intermediate-term (21-59 days post-injury) timeframe and indicate lingering deficits exist. Mean effect size differences were observed between RT measure types and computerized neurocognitive testing platforms; however, all categories displayed negative effects consistent with impaired RT following concussion. Clinical interpretation suggests that measuring RT post-concussion is more important than considering the RT method employed so long as reliable and valid tools are used. PROSPERO Registration #CRD42019119323.
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Affiliation(s)
- Landon B Lempke
- UGA Concussion Research Laboratory, Department of Kinesiology, University of Georgia, Ramsey Student Center, 330 River Rd., Athens, GA, 30602, USA. .,UGA Biomechanics Laboratory, Department of Kinesiology, University of Georgia, Athens, GA, USA.
| | - David R Howell
- Sports Medicine Center, Children's Hospital of Colorado, Aurora, CO, USA.,Department of Orthopaedics, School of Medicine, University of Colorado, Aurora, CO, USA
| | - James T Eckner
- Department of Physical Medicine and Rehabilitation, University of Michigan, Ann Arbor, MI, USA
| | - Robert C Lynall
- UGA Concussion Research Laboratory, Department of Kinesiology, University of Georgia, Ramsey Student Center, 330 River Rd., Athens, GA, 30602, USA.,UGA Biomechanics Laboratory, Department of Kinesiology, University of Georgia, Athens, GA, USA
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Garcia GGP, Yang J, Lavieri MS, McAllister TW, McCrea MA, Broglio SP. Optimizing Components of the Sport Concussion Assessment Tool for Acute Concussion Assessment. Neurosurgery 2021; 87:971-981. [PMID: 32433732 DOI: 10.1093/neuros/nyaa150] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2019] [Accepted: 03/12/2020] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND The Sport Concussion Assessment Tool (SCAT) could be improved by identifying critical subsets that maximize diagnostic accuracy and eliminate low information elements. OBJECTIVE To identify optimal SCAT subsets for acute concussion assessment. METHODS Using Concussion Assessment, Research, and Education (CARE) Consortium data, we compared student-athletes' and cadets' preinjury baselines (n = 2178) with postinjury assessments within 6 h (n = 1456) and 24 to 48 h (n = 2394) by considering demographics, symptoms, Standard Assessment of Concussion (SAC), and Balance Error Scoring System (BESS) scores. We divided data into training/testing (60%/40%) sets. Using training data, we integrated logistic regression with an engineering methodology-mixed integer programming-to optimize models with ≤4, 8, 12, and 16 variables (Opt-k). We also created models including only raw scores (Opt-RS-k) and symptom, SAC, and BESS composite scores (summary scores). We evaluated models using testing data. RESULTS At <6 h and 24 to 48 h, most Opt-k and Opt-RS-k models included the following symptoms: do not feel right, headache, dizziness, sensitivity to noise, and whether physical or mental activity worsens symptoms. Opt-k models included SAC concentration and delayed recall change scores. Opt-k models had lower Brier scores (BS) and greater area under the curve (AUC) (<6 h: BS = 0.072-0.089, AUC = 0.95-0.96; 24-48 h: BS = 0.085-0.093, AUC = 0.94-0.95) than Opt-RS-k (<6 h: BS = 0.082-0.087, AUC = 0.93-0.95; 24-48 h: BS = 0.095-0.099, AUC = 0.92-0.93) and summary score models (<6 h: BS = 0.14, AUC = 0.89; 24-48 h: BS = 0.15, AUC = 0.87). CONCLUSION We identified SCAT subsets that accurately assess acute concussion and improve administration time over the complete battery, highlighting the importance of eliminating "noisy" elements. These findings can direct clinicians to the SCAT components that are most sensitive to acute concussion.
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Affiliation(s)
- Gian-Gabriel P Garcia
- Department of Industrial and Operations Engineering, University of Michigan, Ann Arbor, Michigan
| | - Jing Yang
- Department of Industrial and Operations Engineering, University of Michigan, Ann Arbor, Michigan
| | - Mariel S Lavieri
- Department of Industrial and Operations Engineering, University of Michigan, Ann Arbor, Michigan
| | - Thomas W McAllister
- Department of Psychiatry, Indiana University School of Medicine, Indianapolis, Indiana
| | - Michael A McCrea
- Department of Neurosurgery and Neurology, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Steven P Broglio
- Michigan Concussion Center, School of Kinesiology, University of Michigan, Ann Arbor, Michigan
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Sensitivity and Specificity of a Multimodal Approach for Concussion Assessment in Youth Athletes. J Sport Rehabil 2021; 30:850-859. [PMID: 33547256 DOI: 10.1123/jsr.2020-0279] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2020] [Revised: 10/21/2020] [Accepted: 11/06/2020] [Indexed: 12/16/2022]
Abstract
CONTEXT Current international consensus endorses a multimodal approach to concussion assessment. However, the psychometric evaluation of clinical measures used to identify postconcussion performance deficits once an athlete is asymptomatic remains limited, particularly in the pediatric population. OBJECTIVE To describe and compare the sensitivity and specificity of a multimodal assessment battery (balance, cognition, and upper and lower body strength) versus individual clinical measures at discriminating between concussed youth athletes and noninjured controls when asymptomatic. DESIGN Prospective cohort study. SETTING Hospital laboratory setting. PARTICIPANTS A total of 32 youth athletes with a concussion and 32 matched (age and sex) noninjured control participants aged 10-18 years. INTERVENTION(S) Participants were administered preinjury (baseline) assessments of cognition (Immediate Post-Concussion Assessment and Cognitive Testing [ImPACT]), balance (BioSway), and upper and lower body strength (grip strength and standing long jump). Assessments were readministered when concussed participants reported symptom resolution (asymptomatic time point). Noninjured control participants were reassessed using the same time interval as their concussion matched pair. Sensitivity and specificity were calculated using standardized regression-based methods and receiver operating characteristic curves. MAIN OUTCOME MEASURES Outcome measures included baseline and postinjury ImPACT, BioSway, grip strength, and standing long jump scores. RESULTS When asymptomatic, declines in performance on each individual clinical measure were seen in 3% to 22% of the concussion group (sensitivity = 3%-22%) compared with 3% to 13% of the noninjured control group (specificity = 87%-97%) (90% confidence interval). The multimodal battery of all combined clinical measures yielded a sensitivity of 41% and a specificity of 77% (90% confidence interval). Based on discriminative analyses, the multimodal approach was statistically superior compared with an individual measures approach for balance and upper and lower body strength, but not for cognition. CONCLUSIONS Results provide a foundation for understanding which domains of assessment (cognition, balance, and strength) may be sensitive and specific to deficits once symptoms resolve in youth athletes. More work is needed prior to clinical implementation of a preinjury (baseline) to postinjury multimodal approach to assessment following concussion in youth athletes.
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Abstract
OBJECTIVES To evaluate the relationship between preinjury risk factors (RFs) and subsequent occurrence of concussion and examine whether preinjury RFs or postinjury assessments predict clinical recovery in collegiate athletes. METHODS Risk factors (sex, sport, and self-report history of concussion, migraine, attention-deficit disorder, learning disability, depression, and anxiety) and Sport Concussion Assessment Tool (SCAT), depression/anxiety screenings, and neuropsychological testing were obtained before the season. For athletes who sustained concussion, RFs, postinjury SCAT, neuropsychological assessment, and clinical recovery were assessed. RESULTS We assessed 1152 athletes (69% male) at baseline and 145 (75% male) after subsequent concussion diagnosis. Only sport type (Wald = 40.29, P = 0.007) and concussion history (Wald = 9.91, P = 0.007) accounted for unique variance in subsequent concussion. Of athletes followed until full recovery, mean days until symptom-free (DUSF) was 9.84 ± 11.11 days (n = 138, median = 5 days, range = 1-86) and mean days until full return to play (DUFRTP) was 20.21 ± 19.17 (n = 98, median = 20.21, range = 4-150). None of the RFs or baseline testing measures were associated with DUSF or DUFRTP (P's > 0.05). After injury, athletes who reported more total symptoms (rs = 0.31, P < 0.001) and higher symptom severity (rs = 0.33, P < 0.001) exhibited longer DUSF. Days until symptom-free correlated with DUFRTP (rs = 0.75, P < 0.001). Among athletes assessed within 2 days after injury, DUSF was associated with Immediate Postconcussion Assessment and Cognitive Test visual motor (rs = -0.31, P = 0.004), reaction time (rs = 0.40, P < 0.001), and symptom score (rs = 0.54, P < 0.001). CONCLUSIONS Only sport type and concussion history predicted subsequent occurrence of concussion, and none of the RFs or baseline measures predicted clinical recovery. Immediate postinjury assessments, including symptom number and severity, and select clinical measures predicted longer clinical recovery.
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Dugan EL, Shilt JS, Masterson CM, Ernest KM. The use of inertial measurement units to assess gait and postural control following concussion. Gait Posture 2021; 83:262-267. [PMID: 33220659 DOI: 10.1016/j.gaitpost.2020.10.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Revised: 09/04/2020] [Accepted: 10/06/2020] [Indexed: 02/02/2023]
Abstract
BACKGROUND Impairments in gait and balance function are typical after concussion. There is evidence that these neuromuscular deficits persist past the typical time of symptom resolution. The ability to quantify these changes in gait and balance may provide useful information when making return to play decisions in clinical settings. RESEARCH QUESTION Are changes in gait function and postural control evident across the course of a concussion management program? METHODS A retrospective analysis of a convenience sample of 38 patients who were seen for concussion between October 2017 and May 2019 was performed. Gait and balance measures were assessed at their initial clinic visit post-injury and at their clearance visit using inertial measurement units. During dual-task walking trials, the medial-lateral motion of the center of mass and gait velocity were measured. Postural sway complexity and jerk index were measured during both eyes-open and eyes-closed balance trials. RESULTS Paired samples t-tests and Wilcoxon signed rank tests were used to determine whether statistically significant changes occurred for the gait and balance variables, respectively. Medial-lateral sway decreased (4.4 ± 1.3 cm to 4.0 ± 1.2 cm, p = 0.018) and gait velocity increased (0.78 ± 0.23 m/s to 0.91 ± 0.18 m/s, p < 0.001) from initial to clearance testing. Jerk index decreased (6.41 ± 11.06 m2/s5 to 5.73 ± 4.28 m2/s5, p = 0.031) and (11.87 ± 26.42 m2/s5 to 7.87 ± 8.38 m2/s5, p = 0.003) from initial to clearance testing for the eyes-open and eyes-closed conditions, respectively. Complexity index increased (2.38 ± 1.08-2.86 ± 0.72, p = 0.010) from initial to clearance testing for the eyes-closed condition. There was no change in complexity index for the eyes-open condition. SIGNIFICANCE These preliminary results support the potential use of measures of gait and postural control to assess recovery following a concussion in a clinical setting.
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Affiliation(s)
- Eric L Dugan
- Texas Children's Hospital, The Woodlands, TX 77384, USA; Department of Orthopedic Surgery, Baylor College of Medicine, Houston, TX 77030, USA.
| | - Jeffrey S Shilt
- Texas Children's Hospital, The Woodlands, TX 77384, USA; Department of Orthopedic Surgery, Baylor College of Medicine, Houston, TX 77030, USA
| | | | - Kristin M Ernest
- Texas Children's Hospital, The Woodlands, TX 77384, USA; Department of Pediatrics, Baylor College of Medicine, Houston, TX 77030, USA
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Sensitivity and Specificity of Computer-Based Neurocognitive Tests in Sport-Related Concussion: Findings from the NCAA-DoD CARE Consortium. Sports Med 2020; 51:351-365. [PMID: 33315231 DOI: 10.1007/s40279-020-01393-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/19/2020] [Indexed: 11/25/2022]
Abstract
BACKGROUND To optimally care for concussed individuals, a multi-dimensional approach is critical and a key component of this assessment in the athletic environment is computer-based neurocognitive testing. However, there continues to be concerns about the reliability and validity of these testing tools. The purpose of this study was to determine the sensitivity and specificity of three common computer-based neurocognitive tests (Immediate Post-Concussion Assessment and Cognitive Testing [ImPACT], CNS Vital Signs, and CogState Computerized Assessment Tool [CCAT]), to provide guidance on their clinical utility. METHODS This study analyzed assessments from a cohort of collegiate athletes and non-varsity cadets from the NCAA-DoD CARE Consortium. The data were collected from 2014-2018. Study participants were divided into two testing groups [concussed, n = 1414 (baseline/24-48 h) and healthy, n = 8305 (baseline/baseline)]. For each test type, change scores were calculated for the components of interest. Then, the Normative Change method, which used normative data published in a similar cohort, and the Reliable Change Index (RCI) method were used to determine if the change scores were significant. RESULTS Using the Normative Change method, ImPACT performed best with an 87.5%-confidence interval and 1 number of components failed (NCF; sensitivity = 0.583, specificity = 0.625, F1 = 0.308). CNS Vital Signs performed best with a 90%-confidence interval and 1 NCF (sensitivity = 0.587, specificity = 0.532, F1 = 0.314). CCAT performed best when using a 75%-confidence interval and 2 NCF (sensitivity = 0.513, specificity = 0.715, F1 = 0.290). When using the RCI method, ImPACT performed best with an 87.5%-confidence interval and 1 NCF (sensitivity = 0.626, specificity = 0.559, F1 = 0.297). CONCLUSION When considering all three computer-based neurocognitive tests, the overall low sensitivity and specificity results provide additional evidence for the use of a multi-dimensional assessment for concussion diagnosis, including symptom evaluation, postural control assessment, neuropsychological status, and other functional assessments.
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Ralston JD, Raina A, Benson BW, Peters RM, Roper JM, Ralston AB. Physiological Vibration Acceleration (Phybrata) Sensor Assessment of Multi-System Physiological Impairments and Sensory Reweighting Following Concussion. MEDICAL DEVICES-EVIDENCE AND RESEARCH 2020; 13:411-438. [PMID: 33324120 PMCID: PMC7733539 DOI: 10.2147/mder.s279521] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Accepted: 11/02/2020] [Indexed: 11/23/2022] Open
Abstract
Objective To assess the utility of a head-mounted wearable inertial motion unit (IMU)-based physiological vibration acceleration (“phybrata”) sensor to support the clinical diagnosis of concussion, classify and quantify specific concussion-induced physiological system impairments and sensory reweighting, and track individual patient recovery trajectories. Methods Data were analyzed from 175 patients over a 12-month period at three clinical sites. Comprehensive clinical concussion assessments were first completed for all patients, followed by testing with the phybrata sensor. Phybrata time series data and spatial scatter plots, eyes open (Eo) and eyes closed (Ec) phybrata powers, average power (Eo+Ec)/2, Ec/Eo phybrata power ratio, time-resolved phybrata spectral density (TRPSD) distributions, and receiver operating characteristic (ROC) curves are compared for individuals with no objective impairments and those clinically diagnosed with concussions and accompanying vestibular impairment, other neurological impairment, or both vestibular and neurological impairments. Finally, pre- and post-injury phybrata case report results are presented for a participant who was diagnosed with a concussion and subsequently monitored during treatment, rehabilitation, and return-to-activity clearance. Results Phybrata data demonstrate distinct features and patterns for individuals with no discernable clinical impairments, diagnosed vestibular pathology, and diagnosed neurological pathology. ROC curves indicate that the average power (Eo+Ec)/2 may be utilized to support clinical diagnosis of concussion, while Eo and Ec/Eo may be utilized as independent measures to confirm accompanying neurological and vestibular impairments, respectively. All 3 measures demonstrate area under the curve (AUC), sensitivity, and specificity above 90% for their respective diagnoses. Phybrata spectral analyses demonstrate utility for quantifying the severity of concussion-induced physiological impairments, sensory reweighting, and subsequent monitoring of improvements throughout treatment and rehabilitation. Conclusion Phybrata testing assists with objective concussion diagnosis and provides an important adjunct to standard concussion assessment tools by objectively ascertaining neurological and vestibular impairments, guiding targeted rehabilitation strategies, monitoring recovery, and assisting with return-to-sport/work/learn decision-making.
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Affiliation(s)
| | - Ashutosh Raina
- Center of Excellence for Pediatric Neurology, Rocklin, CA 95765, USA.,Concussion Medical Clinic, Rocklin, CA 95765, USA
| | - Brian W Benson
- Benson Concussion Institute, Calgary, Alberta T3B 6B7, Canada.,Canadian Sport Institute Calgary, Calgary, Alberta T3B 5R5, Canada
| | - Ryan M Peters
- Faculty of Kinesiology, University of Calgary, Calgary, Alberta T2N 1N4, Canada.,Hotchkiss Brain Institute, University of Calgary, Calgary, Alberta T2N 1N4, Canada
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Büttner F, Howell D, Severini G, Doherty C, Blake C, Ryan J, Delahunt E. Using functional movement tests to investigate the presence of sensorimotor impairment in amateur athletes following sport-related concussion: A prospective, longitudinal study. Phys Ther Sport 2020; 47:105-113. [PMID: 33242699 DOI: 10.1016/j.ptsp.2020.10.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2020] [Revised: 10/27/2020] [Accepted: 10/30/2020] [Indexed: 10/23/2022]
Abstract
OBJECTIVE To longitudinally investigate the presence of sensorimotor impairments in amateur athletes following sport-related concussion using two functional movement tests. DESIGN Prospective, longitudinal study. SETTING Human movement analysis laboratory. PARTICIPANTS Athletes who presented to a hospital emergency department and were diagnosed with sport-related concussion, and sex-, age-, and activity-matched non-concussed, control athletes. Concussed participants were assessed within one-week following sport-related concussion, upon clearance to return-to-sporting activity (RTA), and two weeks after RTA. Control participants were assessed at an initial time-point and approximately two and four weeks following their initial study assessment. MAIN OUTCOMES MEASURES At each laboratory assessment, participants completed two functional movement tests: the Star Excursion Balance Test to evaluate anterior reach distance (normalised for leg length) and fractal dimension (centre of pressure path complexity), and the Multiple Hop Test to evaluate corrective postural strategies and time-to-stabilisation. RESULTS Fifty concussed athletes and 50 control athletes completed the study. There were no significant differences at any study assessment between the concussion and control group on the Star Excursion Balance Test anterior reach distance or fractal dimension (centre of pressure path complexity). During the Multiple Hop Test, the concussion group used a significantly greater number of corrective postural strategies than the control group one-week following sport-related concussion and upon clearance to RTA, but not two weeks following RTA. CONCLUSION Recently concussed athletes made a greater number of corrective postural strategies than control participants during the Multiple Hop Test upon clearance to RTA but not two weeks after RTA. The Multiple Hop Test may offer a clinically useful tool for practitioners to examine the recovery of subtle sensorimotor impairments and related RTA readiness.
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Affiliation(s)
- Fionn Büttner
- School of Public Health, Physiotherapy and Sports Science, University College Dublin, Dublin, Ireland.
| | - David Howell
- Sports Medicine Center, Children's Hospital Colorado, Aurora, CO, USA; Department of Orthopedics, University of Colorado School of Medicine, Aurora, CO, USA; The Micheli Center for Sports Injury Prevention, Waltham, MA, USA.
| | - Giacomo Severini
- School of Electrical and Electronic Engineering, University College Dublin, Dublin, Ireland; Insight Centre for Data Analytics, University College Dublin, Dublin, Ireland; UCD Centre for Biomedical Engineering, University College Dublin, Dublin, Ireland.
| | - Cailbhe Doherty
- School of Public Health, Physiotherapy and Sports Science, University College Dublin, Dublin, Ireland.
| | - Catherine Blake
- School of Public Health, Physiotherapy and Sports Science, University College Dublin, Dublin, Ireland.
| | - John Ryan
- Emergency Department, St. Vincent's University Hospital, Elm Park, Dublin 4, Ireland.
| | - Eamonn Delahunt
- Institute for Sport & Health, University College Dublin, Dublin, Ireland; School of Public Health, Physiotherapy and Sports Science, University College Dublin, Dublin, Ireland.
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Reynier KA, Alshareef A, Sanchez EJ, Shedd DF, Walton SR, Erdman NK, Newman BT, Giudice JS, Higgins MJ, Funk JR, Broshek DK, Druzgal TJ, Resch JE, Panzer MB. The Effect of Muscle Activation on Head Kinematics During Non-injurious Head Impacts in Human Subjects. Ann Biomed Eng 2020; 48:2751-2762. [PMID: 32929556 DOI: 10.1007/s10439-020-02609-7] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Accepted: 09/02/2020] [Indexed: 12/17/2022]
Abstract
In this study, twenty volunteers were subjected to three, non-injurious lateral head impacts delivered by a 3.7 kg padded impactor at 2 m/s at varying levels of muscle activation (passive, co-contraction, and unilateral contraction). Electromyography was used to quantify muscle activation conditions, and resulting head kinematics were recorded using a custom-fit instrumented mouthpiece. A multi-modal battery of diagnostic tests (evaluated using neurocognitive, balance, symptomatic, and neuroimaging based assessments) was performed on each subject pre- and post-impact. The passive muscle condition resulted in the largest resultant head linear acceleration (12.1 ± 1.8 g) and angular velocity (7.3 ± 0.5 rad/s). Compared to the passive activation, increasing muscle activation decreased both peak resultant linear acceleration and angular velocity in the co-contracted (12.1 ± 1.5 g, 6.8 ± 0.7 rad/s) case and significantly decreased in the unilateral contraction (10.7 ± 1.7 g, 6.5 ± 0.7 rad/s) case. The duration of angular velocity was decreased with an increase in neck muscle activation. No diagnostic metric showed a statistically or clinically significant alteration between baseline and post-impact assessments, confirming these impacts were non-injurious. This study demonstrated that isometric neck muscle activation prior to impact can reduce resulting head kinematics. This study also provides the data necessary to validate computational models of head impact.
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Affiliation(s)
- Kristen A Reynier
- Center for Applied Biomechanics, University of Virginia, Charlottesville, VA, USA
| | - Ahmed Alshareef
- Center for Applied Biomechanics, University of Virginia, Charlottesville, VA, USA
| | | | - Daniel F Shedd
- Center for Applied Biomechanics, University of Virginia, Charlottesville, VA, USA
| | - Samuel R Walton
- Department of Kinesiology, University of Virginia, Charlottesville, VA, USA
| | - Nicholas K Erdman
- Department of Kinesiology, University of Virginia, Charlottesville, VA, USA
| | - Benjamin T Newman
- Department of Radiology, University of Virginia, Charlottesville, VA, USA
| | - J Sebastian Giudice
- Center for Applied Biomechanics, University of Virginia, Charlottesville, VA, USA
| | - Michael J Higgins
- Department of Kinesiology, University of Virginia, Charlottesville, VA, USA
| | | | - Donna K Broshek
- Neurocognitive Assessment Lab, University of Virginia, Charlottesville, VA, USA
| | - Thomas J Druzgal
- Department of Radiology, University of Virginia, Charlottesville, VA, USA
| | - Jacob E Resch
- Department of Kinesiology, University of Virginia, Charlottesville, VA, USA
| | - Matthew B Panzer
- Center for Applied Biomechanics, University of Virginia, Charlottesville, VA, USA.
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Walton SR, Broshek DK, Freeman JR, Hertel J, Meyer JP, Erdman NK, Resch JE. Institutionally Based ImPACT Test® Normative Values May Differ from Manufacturer-Provided Normative Values. Arch Clin Neuropsychol 2020; 35:275-282. [PMID: 31711107 DOI: 10.1093/arclin/acz068] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Revised: 08/30/2019] [Accepted: 10/15/2019] [Indexed: 11/14/2022] Open
Abstract
OBJECTIVE The necessity for pre-injury baseline computerized neurocognitive assessments versus comparing post-concussion outcomes to manufacturer-provided normative data is unclear. Manufacturer-provided norms may not be equivalent to institution-specific norms, which poses risks for misclassifying the presence of impairment when comparing individual post-concussion performance to manufacturer-provided norms. The objective of this cohort study was to compare institutionally derived normative data to manufacturer-provided normative values provided by ImPACT® Applications, Incorporated. METHOD National Collegiate Athletic Association Division 1 university student athletes (n = 952; aged 19.2 ± 1.4 years, 42.5% female) from one university participated in this study by completing pre-injury baseline Immediate Post-Concussion Assessment and Cognitive Test (ImPACT) assessments. Participants were separated into 4 groups based on ImPACT's age and gender norms: males <18 years old (n = 186), females <18 years old (n = 165), males >19 years old (n = 361) or females >19 years old (n = 240). Comparisons were made between manufacturer-provided norms and institutionally derived normative data for each of ImPACT's clinical composite scores: Verbal (VEM) and Visual (VIM) Memory, Visual Motor Speed (VMS), and Reaction Time (RT). Outcome scores were compared for all groups using a Chi-squared goodness of fit analysis. RESULTS Institutionally derived normative data indicated above average performance for VEM, VIM, and VMS, and slightly below average performance for RT compared to the manufacturer-provided data (χ2 ≥ 20.867; p < 0.001). CONCLUSIONS Differences between manufacturer- and institution-based normative value distributions were observed. This has implications for an increased risk of misclassifying impairment following a concussion in lieu of comparison to baseline assessment and therefore supports the need to utilize baseline testing when feasible, or otherwise compare to institutionally derived norms rather than manufacturer-provided norms.
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Affiliation(s)
- Samuel R Walton
- Department of Kinesiology, University of Virginia, Charlottesville, VA 22903, USA.,Department of Exercise and Sport Science, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Donna K Broshek
- Department of Psychiatry and Neurobehavioral Sciences, University of Virginia School of Medicine, Charlottesville, VA 22903, USA
| | - Jason R Freeman
- Department of Athletics, Sports Psychology, University of Virginia, Charlottesville, VA 22903, USA
| | - Jay Hertel
- Department of Kinesiology, University of Virginia, Charlottesville, VA 22903, USA
| | - J Patrick Meyer
- Department of Leadership, Foundations and Policy, University of Virginia, Charlottesville, VA 22903, USA.,Northwest Evaluation Association, Portland, OR 97209, USA
| | - Nicholas K Erdman
- Department of Kinesiology, University of Virginia, Charlottesville, VA 22903, USA
| | - Jacob E Resch
- Department of Kinesiology, University of Virginia, Charlottesville, VA 22903, USA
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Clinical Detection and Recovery of Vestibular and Oculomotor Impairments Among Amateur Athletes Following Sport-Related Concussion: A Prospective, Matched-Cohort Study. J Head Trauma Rehabil 2020; 36:87-95. [PMID: 32898028 DOI: 10.1097/htr.0000000000000608] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVE To (1) quantify the diagnostic accuracy of the vestibular/oculomotor screening (VOMS), and (2) determine the recovery of vestibular and oculomotor impairments exhibited by concussed athletes compared with nonconcussed athletes using the VOMS. SETTING Clinical assessment laboratory. PARTICIPANTS Amateur athletes who were diagnosed with sport-related concussion by emergency department physicians, and non-concussed, control athletes. DESIGN Prospective, longitudinal study. MAIN MEASURES Participants were assessed 1 week following sport-related concussion, upon clearance to return-to-sporting activity, and 2 weeks following return-to-sporting activity by a study investigator who administered the VOMS. We calculated test sensitivity, specificity, and positive and negative predictive values to estimate the diagnostic accuracy of the VOMS. We performed a mixed-design analysis of variance to assess differences in VOMS symptom scores reported by concussed athletes compared with control athletes. RESULTS Fifty concussion participants and 50 control participants completed the study. The VOMS demonstrated sensitivity and specificity of 96% and 46%, respectively, and produced positive and negative predictive values of 64% and 92%, respectively. The concussion group exhibited a significantly greater symptom provocation change score from baseline than the control group for all test domains of the VOMS only in the first week following concussion. CONCLUSION The VOMS may be most useful as a clinical screening tool to rule out, rather than confirm, the presence of sport-related concussion. The VOMS may be appropriate to inform the recovery of vestibular and oculomotor impairments exhibited by concussed individuals over time.
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Lempke LB, Weber Rawlins ML, Lynall RC, Schmidt JD. The Influence of Concussion Knowledge on Reporting Intentions in Collegiate Student-Athletes. ACTA ACUST UNITED AC 2020. [DOI: 10.3928/19425864-20190618-01] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Lysenko-Martin MR, Hutton CP, Sparks T, Snowden T, Christie BR. Multiple Object Tracking Scores Predict Post-Concussion Status Years after Mild Traumatic Brain Injury. J Neurotrauma 2020; 37:1777-1787. [DOI: 10.1089/neu.2019.6842] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Affiliation(s)
| | - Craig P. Hutton
- Division of Medical Sciences, University of Victoria, Victoria, British Columbia, Canada
| | - Taya Sparks
- Division of Medical Sciences, University of Victoria, Victoria, British Columbia, Canada
| | - Taylor Snowden
- Division of Medical Sciences, University of Victoria, Victoria, British Columbia, Canada
| | - Brian R. Christie
- Division of Medical Sciences, University of Victoria, Victoria, British Columbia, Canada
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Lempke LB, Schmidt JD, Lynall RC. Concussion Knowledge and Clinical Experience Among Athletic Trainers: Implications for Concussion Health Care Practices. J Athl Train 2020; 55:666-672. [PMID: 32556144 DOI: 10.4085/1062-6050-340-19] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
CONTEXT Athletic trainers (ATs) are heavily involved in concussion assessment and return-to-play (RTP) decision making. Despite ATs' crucial role, few researchers have directly examined ATs' knowledge of concussions or whether concussion knowledge or clinical experience affects clinical concussion-management practices. OBJECTIVE To determine the overall concussion knowledge of ATs and whether concussion knowledge and clinical experience affect concussion-assessment and -management practices. DESIGN Cross-sectional study. SETTING Online survey. PATIENTS OR OTHER PARTICIPANTS Random convenience sample of 8725 (15.0% response rate [1307/8725]; certified, 14.8 ± 10.6 years) ATs surveyed from the National Athletic Trainers' Association membership. MAIN OUTCOME MEASURE(S) The survey collected demographics, concussion-assessment and -management tools used, and concussion knowledge (patient-clinician scenarios, signs and symptoms recognition). We used multiple logistic regression models to determine the odds ratios (ORs) for using assessment and management tools based on signs and symptoms recognition and years of clinical experience. RESULTS The ATs correctly identified 78.0% ± 15.1% of concussion signs and symptoms. Approximately 46% (357/770) of ATs indicated an athlete could RTP if the athlete stated he or she had a "bell rung." Every additional year of clinical experience decreased the odds of using standardized sideline-assessment tools by 3% (OR = 0.97, 95% Confidence Interval [CI] = 0.95, 0.99). The odds of using standardized sideline tools (OR = 0.98, 95% CI = 0.96, 0.99) and symptom checklists (OR = 0.98, 95% CI = 0.97, 0.99) for RTP assessment were significantly decreased for each additional year of clinical experience. No other tools used for RTP assessment were influenced by signs and symptoms recognition (P ≥ .136) or clinical experience (P ≥ .158). CONCLUSIONS The ATs with greater clinical experience had lower odds of using concussion-assessment and -management tools. Athletic trainers should frequently review and implement current consensus guidelines into clinical practice to improve concussion recognition and prevent improper management.
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Affiliation(s)
- Landon B Lempke
- UGA Concussion Research Laboratory, Department of Kinesiology, University of Georgia, Athens
| | - Julianne D Schmidt
- UGA Concussion Research Laboratory, Department of Kinesiology, University of Georgia, Athens
| | - Robert C Lynall
- UGA Concussion Research Laboratory, Department of Kinesiology, University of Georgia, Athens
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Abstract
BACKGROUND AND PURPOSE According to the most recent consensus statement on management of sport-related concussion (SRC), athletes with suspected SRC should receive a comprehensive neurological examination. However, which measures to include in such an examination are not defined. Our objectives were to (1) evaluate test-retest reliability and normative data on vestibular and balance tests in athletes without SRC; (2) compare athletes with and without SRC on the subtests; and (3) identify subtests for concussion testing protocols. METHODS Healthy athletes (n = 87, mean age 20.6 years; standard deviation = 1.8 years; 39 female and 48 male) and athletes with SRC (n = 28, mean age 20.7 years; standard deviation = 1.9 years; 11 female and 17 male) were tested using rotary chair, cervical vestibular-evoked myogenic potential (c-VEMP), and the Sensory Organization Test (SOT). A subset (n = 43) were tested twice. We analyzed reliability of the tests, and compared results between athletes with and without SRC. RESULTS Reliability ranged from poor to strong. There was no significant difference between athletes with and without SRC for tests of peripheral vestibular function (ie, rotary chair and c-VEMP). Athletes with SRC had significantly worse scores (P < 0.05) on vestibular-ocular reflex (VOR) cancellation gain, subjective visual vertical and horizontal variance, and all conditions of the SOT. DISCUSSION AND CONCLUSION SRC did not affect medium frequency VOR or saccular function. SRC did affect the ability to use vestibular inputs for perception of vertical and postural control, as well as ability to cancel the VOR.Video Abstract available for more insights from the authors (see Supplemental Digital Content 1, available at: http://links.lww.com/JNPT/A274).
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Walton SR, Malin SK, Kranz S, Broshek DK, Hertel J, Resch JE. Whole-Body Metabolism, Carbohydrate Utilization, and Caloric Energy Balance After Sport Concussion: A Pilot Study. Sports Health 2020; 12:382-389. [PMID: 32520660 DOI: 10.1177/1941738120923869] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
BACKGROUND Sport concussion (SC) causes an energy crisis in the brain by increasing energy demand, decreasing energy supply, and altering metabolic resources. Whole-body resting metabolic rate (RMR) is elevated after more severe brain injuries, but RMR changes are unknown after SC. The purpose of this study was to longitudinally examine energy-related changes in collegiate athletes after SC. HYPOTHESIS RMR and energy consumption will increase acutely after SC and will return to control levels with recovery. STUDY DESIGN Case-control study. LEVEL OF EVIDENCE Level 4. METHODS A total of 20 collegiate athletes with SC (mean age, 19.3 ± 1.08 years; mean height, 1.77 ± 0.11 m; mean weight, 79.6 ± 23.37 kg; 55% female) were compared with 20 matched controls (mean age, 20.8 ± 2.17 years; mean height, 1.77 ± 0.10 m; mean weight, 81.9 ± 23.45 kg; 55% female). RMR, percentage carbohydrate use (%CHO), and energy balance (EBal; ratio between caloric consumption and expenditure) were assessed 3 times: T1, ≤72 hours after SC; T2, 7 days after T1; and TF, after symptom resolution. A 2 × 2 × 3 (group × sex × time) multivariate analysis of variance assessed RMR, %CHO, and EBal. Changes in RMR, %CHO, and EBal (T1 to TF) were correlated with days to symptom-free and days to return to play in the concussed group. RESULTS Women reported being symptom-free (median, 6 days; range, 3-10 days) sooner than men (median, 11 days; range, 7-16 days). RMR and %CHO did not differ across time between groups or for group × sex interaction. SC participants had higher EBal than controls at T1 (P = 0.016) and T2 (P = 0.010). In men with SC, increasing %CHO over time correlated with days to symptom-free (r = 0.735 and P = 0.038, respectively) and days to return to play (r = 0.829 and P = 0.021, respectively). CONCLUSION Participants with SC were in energy surplus acutely after injury. Although women recovered more quickly than men, men had carbohydrate metabolism changes that correlated with recovery time. CLINICAL RELEVANCE This pilot study shows that male and female student-athletes may have differing physiologic responses to SC and that there may be a role for dietary intervention to improve clinical outcomes after SC.
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Affiliation(s)
- Samuel R Walton
- Department of Kinesiology, University of Virginia, Charlottesville, Virginia.,Center for the Study of Retired Athletes and Matthew Gfeller Sport-Related Traumatic Brain Injury Research Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Steven K Malin
- Department of Kinesiology, University of Virginia, Charlottesville, Virginia
| | - Sibylle Kranz
- Department of Kinesiology, University of Virginia, Charlottesville, Virginia
| | - Donna K Broshek
- Department of Psychiatry and Neurobehavioral Sciences, University of Virginia School of Medicine, Charlottesville, Virginia
| | - Jay Hertel
- Department of Kinesiology, University of Virginia, Charlottesville, Virginia
| | - Jacob E Resch
- Department of Kinesiology, University of Virginia, Charlottesville, Virginia
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Rosenblum DJ, Walton SR, Erdman NK, Broshek DK, Hart JM, Resch JE. If Not Now, When? An Absence of Neurocognitive and Postural Stability Deficits in Collegiate Athletes with One or More Concussions. J Neurotrauma 2020; 37:1211-1220. [PMID: 31910071 DOI: 10.1089/neu.2019.6813] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
A history of concussion has been associated with decreased neurocognitive function and postural control. The purpose of our study was to compare neurocognitive function and postural control in collegiate athletes with and without varying histories of concussion. Collegiate athletes were divided into groups based on 0 (n = 129), 1 (n = 91), 2 (n = 52), and 3+ (n = 34) prior concussions. Participants in each group were carefully matched by sport, sex, height, weight, and age. Athletes were administered the Immediate Post-Concussion Assessment and Cognitive Test (ImPACT™) and the Sensory Organization Test (SOT) as part of a standard of care pre-season assessment. Group ImPACT (Verbal and Visual Memory, Visual Motor Speed, and Reaction Time) and SOT (Equilibrium Score and Somatosensory, Visual, and Vestibular sensory ratios) outcome scores were compared using one-way analyses of variance (ANOVAs). Coefficients of variation (CVs) were also calculated for each outcome score and were compared using two-sample tests with 95% confidence intervals (CIs). Participants with and without a history of concussion were not significantly different for any ImPACT or SOT outcome score (p's > 0.10). Groups (0, 1, 2, and 3+ previous concussions) were not different from each other for any ImPACT or SOT outcome score (p's ≥ 0.11). Likewise, the CVs associated with each ImPACT and SOT outcome score did not vary significantly between outcome scores for any group comparison (p ≥ 0.09). Our findings suggest that a history of one or more concussions does not influence neurocognitive performance or postural stability in collegiate athletes at their pre-season baseline assessment.
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Affiliation(s)
- Daniel J Rosenblum
- Department of Kinesiology, University of Virginia, Charlottesville, Virginia, USA
| | - Samuel R Walton
- Department of Kinesiology, University of Virginia, Charlottesville, Virginia, USA
| | - Nicholas K Erdman
- Department of Kinesiology, University of Virginia, Charlottesville, Virginia, USA
| | - Donna K Broshek
- Department of Psychiatry and Neurobehavioral Sciences, University of Virginia School of Medicine, Charlottesville, Virginia, USA
| | - Joeseph M Hart
- Department of Kinesiology, University of Virginia, Charlottesville, Virginia, USA
| | - Jacob E Resch
- Department of Kinesiology, University of Virginia, Charlottesville, Virginia, USA
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Abstract
It was not too long ago that many people referred to concussion as a “hidden injury” and a “complex injury for which we still had much to learn.” We still have a lot to learn about these injuries, but because of the advancement of concussion research we are better informed today than we were just a decade ago. Much of this work began in the early to mid-1990s with studies aimed at equipping clinicians with better concussion-assessment tools. We needed to remove the guesswork, so more systematic and objective concussion-assessment batteries (sideline and clinic) that included symptom checklists, cognitive tests, and balance assessments were developed and validated. As a result, it became easier to detect and/or rule out concussions and to track recovery for several days postinjury. From 2009 through 2014, all 50 states and the District of Columbia passed concussion legislation requiring concussion education for high school and youth athletes, among other things. This was a critical period in which more emphasis was placed on concussion prevention, ultimately leading to increased reporting of these injuries and a reduction in the number of unreported and undiagnosed concussions. More recently, the corpus of science has evolved to identify potential blood and neuroimaging biomarkers to complement the traditional-clinical assessment tools, and newer studies are focused on treatment after concussion—challenging the notions that “rest is best” and that the effects of concussion are permanent and immutable. The research is ongoing, and several large multisite studies will yield important findings to help guide clinical decision making in the next few years.
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50
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Daniell B, Bernitt C, Walton SR, Malin SK, Resch JE. Changes in Metabolism and Caloric Intake after Sport Concussion: A Case Series. TRANSLATIONAL JOURNAL OF THE AMERICAN COLLEGE OF SPORTS MEDICINE 2020. [DOI: 10.1249/tjx.0000000000000129] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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