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Augusto DD, Scattone Silva R, Medeiros Filho JFD, Michener LA, Sousa CDO. Rotator cuff isometric exercises in combination with scapular muscle strengthening and stretching in individuals with rotator cuff tendinopathy: A multiple-subject case report. J Bodyw Mov Ther 2024; 37:164-169. [PMID: 38432800 DOI: 10.1016/j.jbmt.2023.11.032] [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: 02/20/2023] [Revised: 09/25/2023] [Accepted: 11/15/2023] [Indexed: 03/05/2024]
Abstract
BACKGROUND AND PURPOSE To assess the effects of a rehabilitation protocol of rotator cuff (RC) isometrics coupled with traditional shoulder exercises on patient-rated outcomes, muscle strength, and electromyographic activity in individuals with RC tendinopathy. METHODS Eleven individuals (8 women and 3 men, 37.9 ± 5.6 years) with RC tendinopathy performed isometric RC exercises in combination with scapular muscle stretching and strengthening for 6 weeks. Treatment effects were assessed with patient-rated pain and shoulder function, isometric muscle strength, electromyographic activity during arm elevation and internal and external shoulder rotation, and pain during arm elevation before and at the end of the first session, and after 6 weeks of intervention. RESULTS There were improvements in pain and shoulder function, increased isometric muscle strength for arm elevation and internal rotation, increased muscle activity of the infraspinatus and serratus anterior, and reduced pain during arm elevation after 6 weeks of intervention. DISCUSSION This case report showed improvements on pain and function, increases on isometric strength of the shoulder and on electromyographic activity of the serratus anterior and infraspinatus muscles, as well as decreases on pain during arm elevation, after a 6-week intervention of RC isometric exercises associated with scapular muscle stretching and strengthening in patients with RC tendinopathy.
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Affiliation(s)
- Denise Dal'Ava Augusto
- Department of Physical Therapy, Federal University of Rio Grande do Norte, Natal, RN, Brazil
| | - Rodrigo Scattone Silva
- Faculty of Health Sciences of Trairi, Federal University of Rio Grande do Norte, Santa Cruz, RN, Brazil
| | | | - Lori Ann Michener
- Division of Biokinesiology and Physical Therapy, University of Southern California, Los Angeles, CA, USA
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Rodrigues da Silva Barros B, Dal’Ava Augusto D, de Medeiros Neto JF, Michener LA, Silva RS, Sousa CDO. Isometric versus isotonic exercise in individuals with rotator cuff tendinopathy-Effects on shoulder pain, functioning, muscle strength, and electromyographic activity: A protocol for randomized clinical trial. PLoS One 2023; 18:e0293457. [PMID: 37956135 PMCID: PMC10642785 DOI: 10.1371/journal.pone.0293457] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Accepted: 10/08/2023] [Indexed: 11/15/2023] Open
Abstract
INTRODUCTION Rotator cuff tendinopathy is a common shoulder disorder in which the primary treatment is resistance exercises. Isometric exercises are being studied for lower limb tendinopathies but not for rotator cuff tendinopathy. This protocol for a randomized clinical trial aims to compare the effects of two types of exercise (isometric and isotonic) on shoulder pain, functioning, muscle strength, and electromyographic activity in individuals with rotator cuff tendinopathy. METHODS Forty-six individuals (18 to 60 years old) with shoulder pain for more than three months and unilateral supraspinatus and/or infraspinatus tendinopathy will participate in this trial. Individuals will be randomized into two exercise groups: isometric or isotonic. The following outcomes will be evaluated before and after the first session and after six weeks of intervention: shoulder pain and functioning; isometric strength of shoulder elevation and lateral and medial rotation; and electromyographic activity of medial deltoid, infraspinatus, serratus anterior, and lower trapezius. Groups will perform stretching and strengthening of periscapular muscles. The isometric group will perform three sets of 32 s, at 70% of maximal isometric strength. The isotonic group will perform concentric and eccentric exercises (2 s for each phase) in three sets of eight repetitions at a load of eight repetition maximum. The total time under tension of 96 s will be equal for both groups, and load will be adjusted in weeks three and five of the protocol. Treatment effect between groups will be analyzed using linear mixed model. TRIAL REGISTRATION Trial registration number: Universal Trial Number (UTN) code U1111-1284-7528 and Brazilian Clinical Trials Registry platform-RBR-3pvdvfk.
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Affiliation(s)
- Bianca Rodrigues da Silva Barros
- Department of Physical Therapy, Postgraduate Program of Physical Therapy, Federal University of Rio Grande do Norte, Natal, State of Rio Grande do Norte, Brazil
| | - Denise Dal’Ava Augusto
- Department of Physical Therapy, Postgraduate Program of Physical Therapy, Federal University of Rio Grande do Norte, Natal, State of Rio Grande do Norte, Brazil
| | | | - Lori Ann Michener
- Division of Biokinesiology and Physical Therapy, University of Southern California, Los Angeles, California, United States of America
| | - Rodrigo Scattone Silva
- Faculty of Health Sciences of Trairi, Postgraduate Program in Rehabilitation Sciences, Federal University of Rio Grande do Norte, Santa Cruz, State of Rio Grande do Norte, Brazil
| | - Catarina de Oliveira Sousa
- Department of Physical Therapy, Postgraduate Program of Physical Therapy, Federal University of Rio Grande do Norte, Natal, State of Rio Grande do Norte, Brazil
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Kim YH, Cho HY, Kim SH. Short-Term Effects of Centralization of the Glenohumeral Joint and Dynamic Humeral Centering on Shoulder Pain, Disability, and Grip Strength in Patients with Secondary Subacromial Impingement Syndrome. Healthcare (Basel) 2023; 11:2914. [PMID: 37998406 PMCID: PMC10671653 DOI: 10.3390/healthcare11222914] [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: 09/26/2023] [Revised: 10/30/2023] [Accepted: 11/06/2023] [Indexed: 11/25/2023] Open
Abstract
Subacromial impingement syndrome (SIS) is one of the most common causes of shoulder pain in adults and is caused by muscle imbalance around the shoulder joint, which is referred to as secondary SIS. Centralization of the glenohumeral joint (CGH), one of the intervention methods for this, targets strengthening the control ability of the rotator cuff. Dynamic humeral centering (DHC) targets the learning of selective contractile function of the pectoralis major and latissimus dorsi as depressors of the humeral head. This study aims to determine the short-term effects of CGH and DHC on pain, disability, and grip strength in patients with secondary SIS. Forty-eight patients with secondary SIS participated in the study and were randomly allocated into three groups (CGH group (n = 16), DHC group (n = 16), and simple exercise group (n = 16)) and received the intervention for 50 min. The Constant-Murley score was used to assess shoulder pain and disability (primary outcome), and a hand-held dynamometer was used to assess grip strength (secondary outcome). Measurements were performed before the intervention and one day after the intervention. The results showed that the Constant-Murley score improved in the CGH and DHC groups. In addition, pain and disability (range of motion scores) improved in both the CGH and DHC groups. Improvements in disability (shoulder strength) and grip strength were seen only in the CGH group. Both CGH and DHC can be used as methods for short-term pain release and disability recovery in secondary SIS. In particular, CGH appears to be more effective in the short-term improvement in shoulder strength and grip strength.
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Affiliation(s)
- Yong-Hee Kim
- Department of Health Science, Gachon University Graduate School, Incheon 21936, Republic of Korea;
| | - Hwi-Young Cho
- Department of Health Science, Gachon University Graduate School, Incheon 21936, Republic of Korea;
- Department of Physical Therapy, College of Health Science, Gachon University, Incheon 21936, Republic of Korea
| | - Sung-Hyeon Kim
- Department of Physical Therapy, College of Health Science, Gachon University, Incheon 21936, Republic of Korea
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Vila-Dieguez O, Heindel MD, Awokuse D, Kulig K, Michener LA. Exercise for rotator cuff tendinopathy: Proposed mechanisms of recovery. Shoulder Elbow 2023; 15:233-249. [PMID: 37325389 PMCID: PMC10268139 DOI: 10.1177/17585732231172166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/04/2023] [Revised: 04/08/2023] [Accepted: 04/11/2023] [Indexed: 06/17/2023]
Abstract
Rotator cuff (RC) tendinopathy is a common recurrent cause of shoulder pain, and resistance exercise is the first-line recommended intervention. Proposed causal mechanisms of resistance exercise for patients with RC tendinopathy consist of four domains: tendon structure, neuromuscular factors, pain and sensorimotor processing, and psychosocial factors. Tendon structure plays a role in RC tendinopathy, with decreased stiffness, increased thickness, and collagen disorganization. Neuromuscular performance deficits of altered kinematics, muscle activation, and force are present in RC tendinopathy, but advanced methods of assessing muscle performance are needed to fully assess these factors. Psychological factors of depression, anxiety, pain catastrophizing, treatment expectations, and self-efficacy are present and predict patient-reported outcomes. Central nervous system dysfunctions also exist, specifically altered pain and sensorimotor processing. Resisted exercise may normalize these factors, but limited evidence exists to explain the relationship of the four proposed domains to trajectory of recovery and defining persistent deficits limiting outcomes. Clinicians and researchers can use this model to understand how exercise mediates change in patient outcomes, develop subgroups to deliver patient-specific approach for treatment and define metrics to track recovery over time. Supporting evidence is limited, indicating the need for future studies characterizing mechanisms of recovery with exercise for RC tendinopathy.
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Affiliation(s)
- Oscar Vila-Dieguez
- Division of Biokinesiology & Physical Therapy, University of Southern California, Los Angeles, CA, USA
| | - Matthew D. Heindel
- Division of Biokinesiology & Physical Therapy, University of Southern California, Los Angeles, CA, USA
| | - Daniel Awokuse
- Division of Biokinesiology & Physical Therapy, University of Southern California, Los Angeles, CA, USA
| | - Kornelia Kulig
- Division of Biokinesiology & Physical Therapy, University of Southern California, Los Angeles, CA, USA
| | - Lori A. Michener
- Division of Biokinesiology & Physical Therapy, University of Southern California, Los Angeles, CA, USA
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Zancanaro LL, Cid MM, Côté JN, Oliveira AB. Sex differences in torque steadiness, accuracy and activation of the shoulder girdle muscles during isometric shoulder scaption. J Biomech 2023; 155:111638. [PMID: 37216896 DOI: 10.1016/j.jbiomech.2023.111638] [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: 07/26/2022] [Revised: 05/03/2023] [Accepted: 05/10/2023] [Indexed: 05/24/2023]
Abstract
Females present more neck/shoulder musculoskeletal disorders and have different activation strategies of the shoulder girdle muscles than males. However, the sensorimotor performance and potential sex differences are still largely unexplored. The aim of this study was to investigate sex differences in torque steadiness and accuracy during isometric shoulder scaption. We also examined the amplitude and variability of the activation of the trapezius, serratus anterior (SA), and anterior deltoid muscles during torque output evaluation. Thirty-four asymptomatic adults (17 females) participated. Torque steadiness and accuracy were evaluated during submaximal contractions at 20 % and 35 % of peak torque (PT). There was no sex difference in torque coefficient of variation, but females had significantly lower torque standard deviation (SD) values than males at the two intensities evaluated (p < 0.001) and lower torque median frequency values compared to males, regardless of intensity (p < 0.01). Females had significantly lower absolute error values than males for torque output at 35 %PT (p < 0.01) and lower constant error values compared to males, regardless of intensity (p = 0.01). Females had significantly higher muscle amplitude values than males, except for SA (p = 0.10) and in general, females showed higher muscle activation SD values compared to males (p < 0.05). Females may require more complex muscle activation patterns to achieve a more stable and accurate torque output. Therefore, these sex differences may reflect control mechanisms that may also be at play when explaining the greater risk of neck/shoulder musculoskeletal disorders in females than males.
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Affiliation(s)
- Lucas Leonardo Zancanaro
- Laboratory of Clinical and Occupational Kinesiology (LACO), Department of Physical Therapy, Federal University of São Carlos, Rodovia Washington Luís, km 235 - SP-310, São Carlos, São Paulo, Brazil
| | - Marina Machado Cid
- Laboratory of Clinical and Occupational Kinesiology (LACO), Department of Physical Therapy, Federal University of São Carlos, Rodovia Washington Luís, km 235 - SP-310, São Carlos, São Paulo, Brazil
| | - Julie N Côté
- Department of Kinesiology and Physical Education, McGill University, 475 Pine Avenue West, Montreal, Quebec H2W 1S4, Canada
| | - Ana Beatriz Oliveira
- Laboratory of Clinical and Occupational Kinesiology (LACO), Department of Physical Therapy, Federal University of São Carlos, Rodovia Washington Luís, km 235 - SP-310, São Carlos, São Paulo, Brazil.
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People with chronic low back pain display spatial alterations in high-density surface EMG-torque oscillations. Sci Rep 2022; 12:15178. [PMID: 36071134 PMCID: PMC9452584 DOI: 10.1038/s41598-022-19516-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Accepted: 08/30/2022] [Indexed: 11/08/2022] Open
Abstract
We quantified the relationship between spatial oscillations in surface electromyographic (sEMG) activity and trunk-extension torque in individuals with and without chronic low back pain (CLBP), during two submaximal isometric lumbar extension tasks at 20% and 50% of their maximal voluntary torque. High-density sEMG (HDsEMG) signals were recorded from the lumbar erector spinae (ES) with a 64-electrode grid, and torque signals were recorded with an isokinetic dynamometer. Coherence and cross-correlation analyses were applied between the filtered interference HDsEMG and torque signals for each submaximal contraction. Principal component analysis was used to reduce dimensionality of HDsEMG data and improve the HDsEMG-based torque estimation. sEMG-torque coherence was quantified in the δ(0–5 Hz) frequency bandwidth. Regional differences in sEMG-torque coherence were also evaluated by creating topographical coherence maps. sEMG-torque coherence in the δ band and sEMG-torque cross-correlation increased with the increase in torque in the controls but not in the CLBP group (p = 0.018, p = 0.030 respectively). As torque increased, the CLBP group increased sEMG-torque coherence in more cranial ES regions, while the opposite was observed for the controls (p = 0.043). Individuals with CLBP show reductions in sEMG-torque relationships possibly due to the use of compensatory strategies and regional adjustments of ES-sEMG oscillatory activity.
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Çelik MS, Sönmezer E, Acar M. Effectiveness of proprioceptive neuromuscular facilitation and myofascial release techniques in patients with subacromial impingement syndrome. Somatosens Mot Res 2022; 39:97-105. [PMID: 34991428 DOI: 10.1080/08990220.2021.2018293] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
PURPOSE To compare the effectiveness of proprioceptive neuromuscular facilitation and myofascial release technique in patients with subacromial impingement syndrome on pain, range of motion, muscle strength, quality of life, functionality and disability. METHODS Thirty patients were randomly divided into two groups: proprioceptive neuromuscular facilitation group (n = 15) and proprioceptive neuromuscular facilitation combined with myofascial release technique group (n = 15). Both treatment methods were performed 3 times a week for 4 weeks. Pain severity was assessed by Visuel Analog Scale, range of motion by a goniometer, muscle strength by digital hand dynamometer, quality of life by Nottingham health profile, functionality by arm, shoulder and hand problems questionnaire, disability by shoulder pain and disability index. All measurements were used before and after treatments. Pain severity, range of motion and muscle strength were also evaluated after the first session. RESULTS After the treatment, shoulder pain, range of motion, muscle strength, functionality and disability were improved in two groups (p < 0.05). Proprioceptive neuromuscular facilitation showed improvement in pain, whereas myofascial release technique improved pain, physical activity, emotional state, sleep and total dimensions of life quality (p < 0.05). Proprioceptive neuromuscular facilitation was more effective in reducing activity pain, whereas myofascial release technique was more effective in increasing flexion, external and internal rotation range of motion, flexion and abduction muscle strength after the first session (p < 0.05). CONCLUSIONS The combined application of proprioceptive neuromuscular facilitation and myofascial release technique has a more acute and cumulative positive effect on pain, range of motion, muscle strength, functionality, disability and quality of life in patients with subacromial impingement syndrome.
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Affiliation(s)
- Merve Sinem Çelik
- Physiotherapy and Rehabilitation Department, Baskent University Hospital, Ankara, Turkey
| | - Emel Sönmezer
- Physiotherapy and Rehabilitation Department, Faculty of Health Sciences, Atilim University, Ankara, Turkey
| | - Manolya Acar
- Physiotherapy and Rehabilitation Department, Faculty of Health Sciences, Baskent University, Ankara, Turkey
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Daghiani M, Negahban H, Ebrahimzadeh MH, Moradi A, Kachooei AR, Raeesi J, Divandari A. The effectiveness of comprehensive physiotherapy compared with corticosteroid injection on pain, disability, treatment effectiveness, and quality of life in patients with subacromial pain syndrome: a parallel, single-blind, randomized controlled trial. Physiother Theory Pract 2022:1-15. [DOI: 10.1080/09593985.2022.2044421] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Maryam Daghiani
- Department of Physical Therapy, School of Paramedical Sciences, Mashhad University of Medical Sciences, East Door of Ferdowsi University, Mashhad, Iran
| | - Hossein Negahban
- Department of Physical Therapy, School of Paramedical Sciences, Mashhad University of Medical Sciences, East Door of Ferdowsi University, Mashhad, Iran
- Orthopaedic Research Center, Ghaem Hospital, Mashhad University of Medical Sciences, Mashhad, Iran
| | | | - Ali Moradi
- Orthopaedic Research Center, Ghaem Hospital, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Amir Reza Kachooei
- Orthopaedic Research Center, Ghaem Hospital, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Javad Raeesi
- Department of Physical Therapy, School of Paramedical Sciences, Mashhad University of Medical Sciences, East Door of Ferdowsi University, Mashhad, Iran
| | - Akram Divandari
- Department of Physical Therapy, School of Paramedical Sciences, Mashhad University of Medical Sciences, East Door of Ferdowsi University, Mashhad, Iran
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Ge M, Zhang Y, Li Y, Feng C, Tian J, Huang Y, Zhao T. Publication Trends and Hot Spots in Subacromial Impingement Syndrome Research: A Bibliometric Analysis of the Web of Science Core Collection. J Pain Res 2022; 15:837-856. [PMID: 35370418 PMCID: PMC8974249 DOI: 10.2147/jpr.s348528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Accepted: 03/12/2022] [Indexed: 11/23/2022] Open
Abstract
Background In recent years, the research on subacromial impingement syndrome (SIS) has gradually increased. Although the research directions are diverse, the overall research status and trend are not clear. Objective The aim of our study was to use bibliometric analysis to identify the trends in SIS-related research and to analyze the most highly cited scientific publications on SIS. Methods All data were retrieved from the Web of Science Core Collection database, and the year of publications, countries, journals, institutions and total number of citations were extracted and analyzed. The results related to countries, institutions and keywords were then analyzed using VOSviewer software and bibliometrics online analysis platform. And, we also identified the 100 most cited articles on SIS. Results A total of 548 articles related to AIS were identified. The frequency of publication on SIS has increased substantially over time. Among all countries, Turkey has contributed the most publications on SIS (n=118). The institution with the most articles was Istanbul University (n=17). Journal of Shoulder and Elbow Surgery topped the list of journals and has published 19 SIS-related publications. The hotspot of research changed from the former arthroscopic surgery to physical therapy and rehabilitation. Conclusion The scientific research on SIS has rapidly expanded in recent years. This study represents the first bibliometric analysis of SIS, gives us a systematic and comprehensive summary into the development of SIS.
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Affiliation(s)
- Meng Ge
- Center for Plastic & Reconstructive Surgery, Department of Orthopedics, Zhejiang Provincial People's Hospital (Affiliated People's Hospital, Hangzhou Medical College), Hangzhou, Zhejiang, 310014, People's Republic of China
- Bengbu Medical College, Bengbu, People's Republic of China
| | - Yuan Zhang
- Bengbu Medical College, Bengbu, People's Republic of China
- Center for General Practice Medicine, Department of Rheumatology and Immunology, Zhejiang Provincial People's Hospital (Affiliated People's Hospital, Hangzhou Medical College), Hangzhou, Zhejiang, 310014, People's Republic of China
| | - Yanlei Li
- Center for Plastic & Reconstructive Surgery, Department of Orthopedics, Zhejiang Provincial People's Hospital (Affiliated People's Hospital, Hangzhou Medical College), Hangzhou, Zhejiang, 310014, People's Republic of China
- Bengbu Medical College, Bengbu, People's Republic of China
| | - Chenchen Feng
- Center for Plastic & Reconstructive Surgery, Department of Orthopedics, Zhejiang Provincial People's Hospital (Affiliated People's Hospital, Hangzhou Medical College), Hangzhou, Zhejiang, 310014, People's Republic of China
- Bengbu Medical College, Bengbu, People's Republic of China
| | - Jinlong Tian
- Center for Plastic & Reconstructive Surgery, Department of Orthopedics, Zhejiang Provincial People's Hospital (Affiliated People's Hospital, Hangzhou Medical College), Hangzhou, Zhejiang, 310014, People's Republic of China
- Bengbu Medical College, Bengbu, People's Republic of China
| | - Yazeng Huang
- Center for Plastic & Reconstructive Surgery, Department of Orthopedics, Zhejiang Provincial People's Hospital (Affiliated People's Hospital, Hangzhou Medical College), Hangzhou, Zhejiang, 310014, People's Republic of China
- Bengbu Medical College, Bengbu, People's Republic of China
| | - Tingxiao Zhao
- Center for Plastic & Reconstructive Surgery, Department of Orthopedics, Zhejiang Provincial People's Hospital (Affiliated People's Hospital, Hangzhou Medical College), Hangzhou, Zhejiang, 310014, People's Republic of China
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Razmjou H, van Osnabrugge V, Anunciacion M, Nunn A, Drosdowech D, Roszkowski A, Szafirowicz A, Boljanovic D, Wainwright A, Nam D. Maximizing Muscle Function in Cuff-Deficient Shoulders: A Rehabilitation Proposal for Reverse Arthroplasty. J Shoulder Elb Arthroplast 2022; 5:24715492211023302. [PMID: 34993379 PMCID: PMC8492033 DOI: 10.1177/24715492211023302] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Accepted: 05/17/2021] [Indexed: 11/15/2022] Open
Abstract
Purpose The purpose of this review is to describe the role of altered joint biomechanics in reverse shoulder arthroplasty and to propose a rehabilitation protocol for a cuff-deficient glenohumeral joint based on the current evidence.Methods and Materials: The proposed rehabilitation incorporates the principles of pertinent muscle loading while considering risk factors and surgical complications. Results In light of altered function of shoulder muscles in reverse arthroplasty, scapular plane abduction should be more often utilized as it better activates deltoid, teres minor, upper trapezius, and serratus anterior. Given the absence of supraspinatus and infraspinatus and reduction of external rotation moment arm of the deltoid in reverse arthroplasty, significant recovery of external rotation may not occur, although an intact teres minor may assist external rotation in the elevated position. Conclusion Improving the efficiency of deltoid function before and after reverse shoulder arthroplasty is a key factor in the rehabilitation of the cuff deficient shoulders. Performing exercises in scapular plane and higher abduction angles activates deltoid and other important muscles more efficiently and optimizes surgical outcomes.
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Affiliation(s)
- Helen Razmjou
- Holland Bone and Joint Program, Holland Orthoapaedic & Arthritic Centre, Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada.,Department of Physical Therapy, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada.,Sunnybrook Research Institute, Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada
| | - Varda van Osnabrugge
- Holland Bone and Joint Program, Holland Orthoapaedic & Arthritic Centre, Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada.,Department of Physical Therapy, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada
| | - Mark Anunciacion
- Holland Bone and Joint Program, Holland Orthoapaedic & Arthritic Centre, Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada.,Department of Physical Therapy, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada
| | - Andrea Nunn
- Holland Bone and Joint Program, Holland Orthoapaedic & Arthritic Centre, Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada
| | - Darren Drosdowech
- Roth
- McFarlane Hand & Upper Limb Centre, St. Joseph's Health Care, London, Ontario, Canada.,Division of Orthopaedic Surgery, Department of Surgery, Faculty of Medicine, Western University, London, Ontario, Canada
| | - Ania Roszkowski
- Holland Bone and Joint Program, Holland Orthoapaedic & Arthritic Centre, Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada
| | - Analia Szafirowicz
- Holland Bone and Joint Program, Holland Orthoapaedic & Arthritic Centre, Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada
| | - Dragana Boljanovic
- Holland Bone and Joint Program, Holland Orthoapaedic & Arthritic Centre, Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada.,Department of Physical Therapy, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada
| | - Amy Wainwright
- Holland Bone and Joint Program, Holland Orthoapaedic & Arthritic Centre, Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada.,Department of Physical Therapy, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada
| | - Diane Nam
- Sunnybrook Research Institute, Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada.,Division of Orthopedic Surgery, Department of Surgery, Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada.,Division of Orthopaedic Surgery, Department of Surgery, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada
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Khosravi F, Rahnama M, Karimi N, Amiri M, Geil MD, Rahnama L. Rehabilitative ultrasound imaging of the levator scapula muscle at rest and during contraction: Technical description and reliability. J Bodyw Mov Ther 2021; 28:411-417. [PMID: 34776171 DOI: 10.1016/j.jbmt.2021.07.023] [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: 05/24/2020] [Revised: 07/16/2021] [Accepted: 07/16/2021] [Indexed: 10/20/2022]
Abstract
BACKGROUND Altered scapular muscle activity is associated with abnormal scapular motions and shoulder pain. Hence, quantification of these activities is a challenging issue. OBJECTIVES The purposes of this study were to establish the reliability of measuring levator scapula muscle thickness and to examine how thickness of this muscle changes with contraction. METHODS Twenty-one asymptomatic individuals (mean age 22.29 ± 2.17 years) participated in this study. Three separate ultrasound images of the levator scapula muscle were captured at the neck-shoulder junction at rest and during a loaded isometric contraction. The procedures were repeated twice, four to seven days apart to establish intra-rater test-retest reliability. Interclass correlation coefficients (ICC) and standard error of measurement (SEM) were used to determine the reliability, and a paired t-test was performed to examine the difference in muscle thickness between two conditions. RESULTS The results demonstrated that intra-examiner reliability was good at rest (ICC = 0.88, SEM = 1.16 mm) and excellent during loaded isometric contraction (ICC = 0.95, SEM = 0.91 mm). Furthermore, the thickness of levator scapula muscle significantly increased from rest to the loaded isometric contraction (Effect size = 1.99, P < 0.001). CONCLUSION This study demonstrates that the thickness of the levator scapula muscle can be measured reliably at the neck-shoulder junction. Furthermore, ultrasound measures can reliably detect changes in muscle thickness from rest to a contracted state. Therefore, if the need exists to evaluate muscle morphology before and after any treatment strategy, thickness measurement of levator scapula can be determined reliably using ultrasound.
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Affiliation(s)
- Fariba Khosravi
- Department of Physiotherapy University of Social Welfare and Rehabilitation Sciences, Tehran, Iran
| | - Mahsa Rahnama
- Department of Radiology, Medical Imaging Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Noureddin Karimi
- Department of Physiotherapy University of Social Welfare and Rehabilitation Sciences, Tehran, Iran
| | - Mohsen Amiri
- Department of Physiotherapy University of Social Welfare and Rehabilitation Sciences, Tehran, Iran
| | - Mark D Geil
- Wellstar College of Health and Human Services, Kennesaw State University, Kennesaw, GA, USA
| | - Leila Rahnama
- Department of Health Promotion and Physical Education, Wellstar College of Health and Human Services, Kennesaw State University, Kennesaw, GA, USA.
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Igrek S, Colak TK. Comparison of the effectiveness of proprioceptive neuromuscular facilitation exercises and shoulder mobilization patients with Subacromial Impingement Syndrome: A randomised clinical trial. J Bodyw Mov Ther 2021; 30:42-52. [DOI: 10.1016/j.jbmt.2021.10.015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Revised: 08/09/2021] [Accepted: 10/30/2021] [Indexed: 11/26/2022]
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Muscle Activity Before and After Subacromial Injection. J Sport Rehabil 2021; 30:1144-1150. [PMID: 34470910 DOI: 10.1123/jsr.2020-0524] [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: 12/11/2020] [Revised: 05/20/2021] [Accepted: 06/14/2021] [Indexed: 11/18/2022]
Abstract
CONTEXT Shoulder muscle activation in patients with subacromial impingement is highly cited and variable in the literature. Differences between studies could be due to artifacts introduced by normalization practices in the presence of pain. Ultimately, this lack of knowledge pertaining to pathogenesis limits the clinical treatment and restoration of muscular function. DESIGN A total of 21 patients with stage 2 subacromial impingement and 21 matched controls were recruited for EMG testing of their affected shoulder during an arm elevation task. The patients were tested before and after receiving an injection to their subacromial bursa. METHODS The EMG from 7 shoulder muscles were measured before and after treatment during humeral motion in the scapular plane. RESULTS Our findings indicate an increase in anterior deltoid, middle deltoid, and upper trapezius activity following the injection; further, this trend extended to the controls. The control subjects had a greater activation of the latissimus dorsi at peak arm elevation when compared with the patient group postinjection. CONCLUSIONS Our results indicate that a reduction in subacromial pain is associated with changes in shoulder muscle recruitment, primarily of the deltoid. This change in deltoid activity may lend evidence to rotator cuff function in patients without rotator cuff tears.
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Dottor A, Camerone E, Job M, Barbiani D, Frisaldi E, Testa M. A new visual feedback-based system for the assessment of pinch force, endurance, accuracy and precision. A test-retest reliability study. HAND THERAPY 2021; 26:53-62. [PMID: 37969174 PMCID: PMC10634379 DOI: 10.1177/17589983211002550] [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: 11/09/2020] [Accepted: 02/17/2021] [Indexed: 11/17/2023]
Abstract
Introduction Given that pinch is a precision grip involved in sustained submaximal activities, a Sustained Contraction (SC) task could be associated to Maximal Voluntary Contraction (MVC). To better evaluate the thumb-index system, the test-retest reliability of pinch MVC and SC, measured by a visual feedback-based pinch gauge was assessed. Methods 26 healthy participants performed MVC and SC in two separate sessions. SC required to maintain 40%MVC as long as possible and it was evaluated in terms of time, accuracy (Mean Distance between force trace and target force, MD), precision (Coefficient of Variability of force trace, CV). MD and CV analyses were conducted dividing the SC task into three equivalent time stages (beginning, middle, exhaustion). Relative Reliability (RR) was measured by Intraclass Correlation Coefficient, and Absolute Reliability (AR) was measured by Standard Error of Measurement and by Bland-Altman plot. Results MVC and Time showed high RR and AR in both hands. RR of MD and CV in right hand was excellent in the beginning and middle stages, and fair in the exhaustion one, showing decreasing reliability as fatigue increases. In the left hand RR of MD and CV was generally lower. MD showed excellent reliability in the beginning stage and good reliability in the other stages. CV showed fair relative reliability at both beginning and middle stages, excellent in the last one. Conversely, it was observed high AR of MD and CV in all stages in both hands. Conclusions All indices are reliable to assess motor control of thumb-index pinch in both hands.
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Affiliation(s)
- Alberto Dottor
- Department of Neuroscience, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health, University of Genoa, Genoa, Italy
| | - Eleonora Camerone
- Department of Neuroscience, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health, University of Genoa, Genoa, Italy
| | - Mirko Job
- Department of Neuroscience, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health, University of Genoa, Genoa, Italy
| | - Diletta Barbiani
- Department of Neuroscience, University of Turin Medical School, Turin, Italy
| | - Elisa Frisaldi
- Department of Neuroscience, University of Turin Medical School, Turin, Italy
| | - Marco Testa
- Department of Neuroscience, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health, University of Genoa, Genoa, Italy
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Arvanitidis M, Falla D, Sanderson A, Martinez-Valdes E. Does pain influence force steadiness? A protocol for a systematic review. BMJ Open 2021; 11:e042525. [PMID: 33419915 PMCID: PMC7798681 DOI: 10.1136/bmjopen-2020-042525] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 11/26/2020] [Accepted: 12/30/2020] [Indexed: 11/07/2022] Open
Abstract
INTRODUCTION Performing contractions with minimum force fluctuations is essential for everyday life as reduced force steadiness impacts on the precision of voluntary movements and functional ability. Several studies have investigated the effect of experimental or clinical musculoskeletal pain on force steadiness but with conflicting findings. The aim of this systematic review is to summarise the current literature to determine whether pain, whether it be clinical or experimental, influences force steadiness. METHODS AND ANALYSIS This protocol for a systematic review was informed and reported in line with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses Protocols and the Cochrane Handbook for Systematic Reviews of Interventions. Key databases will be searched from inception to 31 August 2020, including MEDLINE, EMBASE, PubMed, CINAHL Plus, ZETOC and Web of Science. Grey literature and key journals will be also reviewed. Risk of bias will be assessed with the Newcastle-Ottawa tool, and the quality of the cumulative evidence assessed with the Grading of Recommendations, Assessment, Development and Evaluation guidelines. If homogeneity exists between groups of studies, meta-analysis will be conducted. Otherwise, a narrative synthesis approach and a vote-counting method will be used, while the results will be presented as net increases or decreases of force steadiness. ETHICS AND DISSEMINATION The findings will be presented at conferences and the review will be also submitted for publication in a refereed journal. No ethical approval was required. PROSPERO REGISTRATION NUMBER CRD42020196479.
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Affiliation(s)
- Michail Arvanitidis
- Centre of Precision Rehabilitation for Spinal Pain (CPR Spine), School of Sport, Exercise and Rehabilitation Sciences, College of Life and Environmental Sciences, University of Birmingham, Birmingham, UK
| | - Deborah Falla
- Centre of Precision Rehabilitation for Spinal Pain (CPR Spine), School of Sport, Exercise and Rehabilitation Sciences, College of Life and Environmental Sciences, University of Birmingham, Birmingham, UK
| | - Andy Sanderson
- Centre of Precision Rehabilitation for Spinal Pain (CPR Spine), School of Sport, Exercise and Rehabilitation Sciences, College of Life and Environmental Sciences, University of Birmingham, Birmingham, UK
- Department of Sport and Exercise Sciences, Musculoskeletal Science and Sports Medicine Research Centre, Manchester Metropolitan University, Manchester, Greater Manchester, UK
| | - Eduardo Martinez-Valdes
- Centre of Precision Rehabilitation for Spinal Pain (CPR Spine), School of Sport, Exercise and Rehabilitation Sciences, College of Life and Environmental Sciences, University of Birmingham, Birmingham, UK
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Kim SY, Dvir Z, Oh JS. The application of the Neurac technique vs. manual therapy in patients during the acute phase of subacromial impingement syndrome: A randomized single-blinded controlled trial. J Back Musculoskelet Rehabil 2020; 33:645-653. [PMID: 31594195 DOI: 10.3233/bmr-170884] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
BACKGROUD Although the effect of exercise in patients during the subacute and/or chronic subacromial impingement syndrome has been reported, only a few studies have examined the effect of pain free exercise in the acute phase of this disorder. OBJECTIVE To compare the effect of training using the Neurac technique which combines body segments suspension and vibration vs. manual therapy, on various relevant outcome parameters in patients with acute subacromial impingement syndrome (PASIS). METHOD Twenty-six patients underwent a 4 week intervention program. Using random assignment, half of the patients were treated using the Neurac device while the other half was treated using manual therapy. The outcome parameters consisted of shoulder pain, shoulder function, range of motion (ROM) and the isokinetic strength of the external and internal rotators at 60 and 180∘/s. RESULTS Following either modes of interventions, the pain, function, and ROM improved significantly compared to pre-intervention levels in both groups. Time-by-group interaction was observed for the rotational strength which increased significantly and exclusively in the Neurac group. CONCLUSIONS Given its positive effect on shoulder pain, function, ROM and the isokinetic strength of the external and internal rotators, we recommend the application of the Neurac technique in PASIS.
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Affiliation(s)
- Soo-Yong Kim
- Department of Physical Therapy, Pusan National University Yangsan Hospital, Yangsan, Gyeongsangsam-do, Korea
| | - Zeevi Dvir
- Department of Physical Therapy, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Jae-Seop Oh
- Department of Physical Therapy, College of Biomedical Science and Engineering, Inje University, Gimhae, Korea
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Overbeek CL, Tiktak WE, Kolk A, Nagels J, Nelissen RGHH, de Groot JH. Reduced force entropy in subacromial pain syndrome: A cross-sectional analysis. Clin Biomech (Bristol, Avon) 2020; 80:105137. [PMID: 32763626 DOI: 10.1016/j.clinbiomech.2020.105137] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Revised: 07/22/2020] [Accepted: 07/27/2020] [Indexed: 02/07/2023]
Abstract
BACKGROUND Generating a force at the hand requires moments about multiple joints by a theoretically infinite number of arm and shoulder muscle force combinations. This allows for learning and adaptation and can possibly be captured using the complexity (entropy) of an isometrically generated force curve. Patients with Subacromial Pain Syndrome have difficulty to explore alternative, pain-avoiding, motor strategies and we questioned whether loss of motor complexity may contribute to this. We assessed whether patients with Subacromial Pain Syndrome have reduced entropy of an isometrically generated abduction and adduction force curve. METHODS Forty patients and thirty controls generated submaximal isometric ab- and adduction force at the wrist. The force curve was characterized by the magnitude of force variability [standard deviation and coefficient of variation], and the entropy (complexity) of force variability [approximate entropy]. FINDINGS Patients showed reduced entropy both during the abduction (-0.16, confidence interval: [-0.33; -0.00], p: 0.048) and adduction task (-0.20, confidence interval: [-0.37; -0.03], p: 0.024) and reduced force variability during abduction (standard deviation: -0.006, confidence interval: [-0.011; -0.001], p: 0.013 and coefficient of variation: -0.51, confidence interval: [-0.93; -0. 10], p: 0.016). INTERPRETATIONS Isometric force curves of patients with Subacromial Pain Syndrome show reduced complexity compared to asymptomatic controls, which may indicate more narrow and stereotype use of motor options. In future studies, it should be investigated whether the finding of reduced force (motor) entropy indicates functional decline, contributing to decreased ability to acquire and optimize motor strategies in Subacromial Pain Syndrome. LEVEL OF EVIDENCE Level II prognostic study.
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Affiliation(s)
- Celeste L Overbeek
- Department of Orthopaedics, Leiden University Medical Center, Postzone J-11-R, PO Box 9600, 2300RC Leiden, The Netherlands; Laboratory for Kinematics and Neuromechanics, Department of Orthopaedics and Rehabilitation, Leiden University Medical Center, Postzone J-11-R, PO Box 9600, 2300RC Leiden, The Netherlands.
| | - Willemijn E Tiktak
- Department of Orthopaedics, Leiden University Medical Center, Postzone J-11-R, PO Box 9600, 2300RC Leiden, The Netherlands; Laboratory for Kinematics and Neuromechanics, Department of Orthopaedics and Rehabilitation, Leiden University Medical Center, Postzone J-11-R, PO Box 9600, 2300RC Leiden, The Netherlands
| | - Arjen Kolk
- Department of Orthopaedics, Leiden University Medical Center, Postzone J-11-R, PO Box 9600, 2300RC Leiden, The Netherlands; Laboratory for Kinematics and Neuromechanics, Department of Orthopaedics and Rehabilitation, Leiden University Medical Center, Postzone J-11-R, PO Box 9600, 2300RC Leiden, The Netherlands
| | - Jochem Nagels
- Department of Orthopaedics, Leiden University Medical Center, Postzone J-11-R, PO Box 9600, 2300RC Leiden, The Netherlands
| | - Rob G H H Nelissen
- Department of Orthopaedics, Leiden University Medical Center, Postzone J-11-R, PO Box 9600, 2300RC Leiden, The Netherlands
| | - Jurriaan H de Groot
- Department of Orthopaedics, Leiden University Medical Center, Postzone J-11-R, PO Box 9600, 2300RC Leiden, The Netherlands; Laboratory for Kinematics and Neuromechanics, Department of Orthopaedics and Rehabilitation, Leiden University Medical Center, Postzone J-11-R, PO Box 9600, 2300RC Leiden, The Netherlands
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Ortega-Cebrián S, Bagur-Calafat C, Whiteley R, Navarro R, Monné-Guasch L, Girabent-Farrés M. Subacromial Impingment Syndrome does not alter muscle onset activation patterns during shoulder cardinal movement at different speed and load. Musculoskelet Sci Pract 2020; 48:102161. [PMID: 32560865 DOI: 10.1016/j.msksp.2020.102161] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/30/2018] [Revised: 03/19/2020] [Accepted: 03/24/2020] [Indexed: 11/18/2022]
Abstract
This study examines neuromuscular firing patterns in healthy and subjects diagnosed with SIS of the periscapular, prime-moving, and rotator cuff muscles during "clinical" cardinal plane physiological movements at different speeds and loads. EMG recordings were taken in 34 healthy and 34 subjects diagnosed with Subacromial Impingement Syndrome (SIS) of the prime movers, periscapular, and rotator cuff muscles during flexion, scaption, and abduction performed at fast, medium, and slow speeds with a loaded (3 kg) and unloaded arm. Differences in firing patterns between groups were analyzed by fitting mixed linear models with random intercepts per subject, and fixed factors for group, muscle, movement type, speed, and load. No difference in timing of activation was seen between the healthy and SIS. Onset timing of prime movers, periscapular, and rotator cuff muscles were prior to movement in all scenarios studied, with rotator cuff muscles firing last. Speed and load appear to independently vary muscle activation timing in a non-intuitive manner in both healthy and SIS. The lack of different firing neuromuscular patterns in subjects diagnosed with SIS and healthy subjects raises the need to consider individual assessment of motor patterns rather than generalized patterns.
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Affiliation(s)
- Silvia Ortega-Cebrián
- Physiotherapy Department, Aspetar Qatar Sport Medicine Hospital, Sport City Street, Al Buwaira St, Doha, Qatar; Physiotherapy Department. Universitat Internacional Catalunya (UIC), Facultat Fisioteràpia Josep Trueta s/n, 08195, Sant Cugat del Vallès, Barcelona, Spain; Physiotherapy Department, F.C.Barcelona, Ciutat Esportiva Joan Gamper, Av. Onze setembre, S/n, 08970, Sant Joan Despí, Barcelona, Spain.
| | - Caritat Bagur-Calafat
- Physiotherapy Department. Universitat Internacional Catalunya (UIC), Facultat Fisioteràpia Josep Trueta s/n, 08195, Sant Cugat del Vallès, Barcelona, Spain
| | - Rodney Whiteley
- Physiotherapy Department, Aspetar Qatar Sport Medicine Hospital, Sport City Street, Al Buwaira St, Doha, Qatar
| | - Ramon Navarro
- Physiotherapy Department, F.C.Barcelona, Ciutat Esportiva Joan Gamper, Av. Onze setembre, S/n, 08970, Sant Joan Despí, Barcelona, Spain
| | - Laia Monné-Guasch
- Physiotherapy Department. Universitat Internacional Catalunya (UIC), Facultat Fisioteràpia Josep Trueta s/n, 08195, Sant Cugat del Vallès, Barcelona, Spain
| | - Monserrat Girabent-Farrés
- Department of Physioterapy, School of Health Sciences, TecnoCampus-Pompeu Fabra University, Mataró, Barcelona, Spain
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Overbeek CL, Gacaferi H, Schoones JW, Jayakumar P, Vermeulen HM, de Groot JH, Nelissen RGHH, Nagels J. The effect of conservative therapies on proprioception in subacromial pain syndrome: a narrative synthesis. EUROPEAN JOURNAL OF PHYSIOTHERAPY 2020. [DOI: 10.1080/21679169.2020.1787511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Celeste L. Overbeek
- Department of Orthopaedics, Leiden University Medical Center, Leiden, the Netherlands
- Laboratory for Kinematics and Neuromechanics, Department of Orthopaedics and Rehabilitation, Leiden University Medical Center, Leiden, the Netherlands
| | - Hamez Gacaferi
- Department of Orthopaedics, Leiden University Medical Center, Leiden, the Netherlands
| | - Jan W. Schoones
- Walaeus Library, Leiden University Medical Centre, Leiden, the Netherlands
| | - Prakash Jayakumar
- The Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK
| | - Henricus M. Vermeulen
- Department of Physical Therapy, Leiden University Medical Center, Leiden, the Netherlands
| | - Jurriaan H. de Groot
- Laboratory for Kinematics and Neuromechanics, Department of Orthopaedics and Rehabilitation, Leiden University Medical Center, Leiden, the Netherlands
| | - Rob G. H. H. Nelissen
- Department of Orthopaedics, Leiden University Medical Center, Leiden, the Netherlands
| | - Jochem Nagels
- Department of Orthopaedics, Leiden University Medical Center, Leiden, the Netherlands
- Laboratory for Kinematics and Neuromechanics, Department of Orthopaedics and Rehabilitation, Leiden University Medical Center, Leiden, the Netherlands
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Abstract
INTRODUCTION Reorganized force control may be an important adaptation following painful traumas. In this study, force control adaptations were assessed in elbow pain patients. Increasing the contraction demand may overcome pain interference on the motor control and as such act as an internal control. It was hypothesized that elbow pain patients compared with controls would present greater change in the direction of force when increasing the demand of the motor task. METHODS Elbow pain patients (n=19) and asymptomatic participants (n=21) performed isometric wrist extensions at 5% to 70% of maximum voluntary contraction. Pressure pain thresholds were recorded at the lateral epicondyle and tibialis anterior muscle. Contraction force was recorded using a 3-directional force transducer. Participants performed contractions according to visual feedback of the task-related force intensity (main direction of wrist extension) and another set of contractions with feedback of the 3 force directions. Going from the simple to the detailed force feedback will increase the demand of the motor task. Force steadiness in all 3 dimensions and force directions were extracted. RESULTS Compared with controls, elbow pain patients presented lower pressure pain thresholds at both sites (P<0.05). Force steadiness was not significantly different between groups or feedback methods. The change in force direction when providing simple visual feedback in contrast with feedback of all force components at all contraction levels was greater for patients compared with controls (P<0.05). CONCLUSION The larger change in force direction in pain patients implies redistribution of loads across the arm as an associated effect of pain.
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Meghdadi N, Yalfani A, Minoonejad H. Electromyographic analysis of shoulder girdle muscle activation while performing a forehand topspin in elite table tennis athletes with and without shoulder impingement syndrome. J Shoulder Elbow Surg 2019; 28:1537-1545. [PMID: 30982699 DOI: 10.1016/j.jse.2019.01.021] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Revised: 01/08/2019] [Accepted: 01/11/2019] [Indexed: 02/01/2023]
Abstract
BACKGROUND Shoulder impingement syndrome is considered to be associated with an altered muscular activity, which is related to strategy changes in the movement plan. The present study aimed to investigate the differences in timing and intensity of activity of shoulder girdle muscles while performing a forehand topspin loop between elite table tennis players with and without shoulder impingement syndrome. The timing and activity amplitude of these shoulder girdle muscles have not been evaluated in other studies in table tennis elite athletes. METHODS Activation timing and activity levels of the upper trapezius, lower trapezius, and serratus anterior, anterior deltoid, supraspinatus, and biceps brachii muscles were measured in 30 table tennis players (Premier League tournament level or higher) with shoulder impingement syndrome and compared with 30 same-level healthy players while performing the forehand topspin loop. RESULTS The results indicated that the activity levels of the serratus anterior (P = .007) and supraspinatus (P = .001) muscles significantly decreased; however, the activity level of the upper trapezius significantly increased in the impingement compared with the healthy group (P = .009). The serratus anterior (P = .001) was activated significantly later, but the upper trapezius (P = .004) was activated significantly earlier in the impingement group. CONCLUSION Results of the present study support the theory that the activation and sequence of recruiting of the shoulder muscles are altered in people with impingement symptoms, suggesting that impingement syndrome may be associated with disturbed timing and activity level of shoulder girdle muscles.
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Affiliation(s)
- Nazanin Meghdadi
- Department of Sport Injuries, Faculty of Sport Sciences, Bu-Ali Sina University, Hamadan, Iran
| | - Ali Yalfani
- Department of Sport Injuries, Faculty of Sport Sciences, Bu-Ali Sina University, Hamadan, Iran.
| | - Hooman Minoonejad
- Department of Health and Sports Medicine, Faculty of Physical Education and Sport Sciences, University of Tehran, Tehran, Iran
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Altered Cocontraction Patterns of Humeral Head Depressors in Patients with Subacromial Pain Syndrome: A Cross-sectional Electromyography Analysis. Clin Orthop Relat Res 2019; 477:1862-1868. [PMID: 31107319 PMCID: PMC7000021 DOI: 10.1097/corr.0000000000000745] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
BACKGROUND In approximately 29% to 34% of all patients with subacromial pain syndrome (SAPS) there is no anatomic explanation for symptoms, and behavioral aspects and/or central pain mechanisms may play a more important role than previously assumed. A possible behavioral explanation for pain in patients with SAPS is insufficient active depression of the humerus during abduction by the adductor muscles. Although the adductor muscles, specifically the teres major, have the most important contribution to depression of the humerus during abduction, these muscles have not been well studied in patients with SAPS. QUESTIONS/PURPOSES Do patients with SAPS have altered contraction patterns of the arm adductors during abduction compared with asymptomatic people? METHODS SAPS was defined as nonspecific shoulder pain lasting for longer than 3 months that could not be explained by specific conditions such as calcific tendinitis, full-thickness rotator cuff tears, or symptomatic acromioclavicular arthritis, as assessed with clinical examination, radiographs, and magnetic resonance arthrography. Of 85 patients with SAPS who met the prespecified inclusion criteria, 40 were eligible and agreed to participate in this study. Thirty asymptomatic spouses of patients with musculoskeletal complaints, aged 35 to 60 years, were included; the SAPS and control groups were not different with respect to age, sex, and hand dominance. With electromyography, we assessed the contraction patterns of selected muscles that directly act on the position of the humerus relative to the scapula (the latissimus dorsi, teres major, pectoralis major, and deltoid muscles). Cocontraction was quantified through the activation ratio ([AR]; range, -1 to 1). The AR indicates the task-related degree of antagonist activation relative to the same muscle's degree of agonist activation, equaling 1 in case of sole agonist muscle activation and equaling -1 in case of sole antagonistic activation (cocontraction). We compared the AR between patients with SAPS and asymptomatic controls using linear mixed-model analyses. An effect size of 0.10 < AR < 0.20 was subjectively considered to be a modest effect size. RESULTS Patients with SAPS had a 0.11 higher AR of the teres major (95% CI, 0.01-0.21; p = 0.038), a 0.11 lower AR of the pectoralis major (95% CI, -0.18 to -0.04; p = 0.003), and a 0.12 lower AR of the deltoid muscle (95% CI, -0.17 to -0.06; p < 0.001) than control participants did. These differences were considered to be modest. With the numbers available, we found no difference in the AR of the latissimus dorsi between patients with SAPS and controls (difference = 0.05; 95% CI, -0.01 to 0.12; p = 0.120). CONCLUSIONS Patients with SAPS showed an altered adductor cocontraction pattern with reduced teres major activation during abduction. The consequent reduction of caudally directed forces on the humerus may lead to repetitive overloading of the subacromial tissues and perpetuate symptoms in patients with SAPS. Physical therapy programs are frequently effective in patients with SAPS, but targeted approaches are lacking. Clinicians and scientists may use the findings of this study to assess if actively training adductor cocontraction in patients with SAPS to unload the subacromial tissues is clinically effective. The efficacy of training protocols may be enhanced by using electromyography monitoring. LEVEL OF EVIDENCE Level II, prognostic study.
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Kara D, Harput G, Duzgun I. Trapezius muscle activation levels and ratios during scapular retraction exercises: A comparative study between patients with subacromial impingement syndrome and healthy controls. Clin Biomech (Bristol, Avon) 2019; 67:119-126. [PMID: 31103961 DOI: 10.1016/j.clinbiomech.2019.05.020] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/30/2018] [Revised: 05/02/2019] [Accepted: 05/10/2019] [Indexed: 02/07/2023]
Abstract
BACKGROUND Little is known about trapezius muscle activities during scapular retraction exercises in patients with subacromial impingement syndrome. The aim of this study was to compare upper trapezius, middle trapezius and lower trapezius muscle activity and upper/middle and upper/lower trapezius ratios between patients with subacromial impingement syndrome and healthy individuals during six scapular retraction exercises. METHODS Twenty-two patients with subacromial impingement syndrome and 22 healthy individuals participated. Upper, middle, and lower trapezius activities were measured by surface electromyography, while the participants performed six scapular retraction exercises at different shoulder abduction angles in a standing position. Upper/middle and upper/lower trapezius ratios were also calculated. Repeated-measures analyses of variance were performed to determine whether muscle activation levels and ratios differed between groups during exercises. FINDINGS There was no significant exercise × group interactions for upper, middle, and lower trapezius activation levels and upper/middle and upper/lower trapezius ratios (P > .05). A main effect for the exercise was observed for the upper/middle and upper/lower trapezius ratios (P < .05). INTERPRETATION Compared to healthy individuals, patients with subacromial impingement syndrome did not exhibit different upper, middle, and lower trapezius activity and had similar upper/middle and upper/lower trapezius ratios during the various scapular retraction exercises. Therefore, scapular retraction exercises with various shoulder abduction could be safely offered for the patients with subacromial impingement syndrome since it does not lead to abnormal compensatory trapezius muscle activity. If the goal is to minimize upper/middle and upper/lower trapezius ratios, the scapular retraction exercises at 0° shoulder abduction may be used in early stage of shoulder rehabilitation.
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Affiliation(s)
- Dilara Kara
- Hacettepe University, Faculty of Health Sciences, Physiotherapy and Rehabilitation Department, Sihhiye, 06100 Ankara, Turkey.
| | - Gulcan Harput
- Hacettepe University, Faculty of Health Sciences, Physiotherapy and Rehabilitation Department, Sihhiye, 06100 Ankara, Turkey
| | - Irem Duzgun
- Hacettepe University, Faculty of Health Sciences, Physiotherapy and Rehabilitation Department, Sihhiye, 06100 Ankara, Turkey
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Gomes BSQ, Coelho VK, Terra BS, Bunn PS, Saragiotto BT, Ferreira AS, Nogueira LAC. Patients with Subacromial Pain Syndrome Present no Reduction of Shoulder Proprioception: A Matched Case-Control Study. PM R 2019; 11:972-978. [PMID: 30609221 DOI: 10.1002/pmrj.12055] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Accepted: 11/22/2018] [Indexed: 11/06/2022]
Abstract
BACKGROUND Shoulder pain is common among patients with musculoskeletal pain and the prevalence of patients with subacromial pain syndrome (SAPS) is high. Despite the high prevalence, there is a lack of an extensive evaluation of the proprioception acuity in patients with SAPS. Knowledge of the proprioceptive deficit would assist clinicians in the proper treatment and may offer an alternative explanation for the mechanisms underlying SAPS, which are poorly understood. OBJECTIVE To compare the proprioceptive function of the shoulder in patients with SAPS and matched controls. STUDY DESIGN Matched case-control study. SETTING Physical Functional Rehabilitation Service of an outpatient clinic. PARTICIPANTS A total of 32 consecutive patients with SAPS who sought physical therapy for shoulder pain and 32 healthy participants (control group) matched for age, sex, and handedness. INTERVENTIONS All participants completed a questionnaire containing sociodemographic information, pain intensity and characteristics, the Numerical Pain Rating Scale, and the Shoulder Pain and Disability Index. MAIN OUTCOME MEASUREMENTS The proprioceptive assessment was performed through kinesthesia, passive joint position sense (PJPS), and the active joint position sense (AJPS). RESULTS The groups showed no statistically significant differences in kinesthesia, PJPS, and AJPS for internal or external rotation. The proprioceptive acuity was not associated with pain intensity or functional disability in patients with SAPS. CONCLUSIONS Participants with SAPS did not present proprioceptive deficits in a pain-free motion of medial and lateral rotation when compared to their matched controls. The proprioceptive deficit may not be involved with the mechanisms underlying SAPS and seems not to interfere with the clinical outcomes of patients with SAPS. LEVEL OF EVIDENCE Level III.
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Affiliation(s)
- Bruno S Q Gomes
- B.S.Q.G., V.K.C. Rehabilitation Science Department, Augusto Motta University Center (UNISUAM), Rio de Janeiro, Brazil and Physical Therapy Department, Admiral Adalberto Nunes Physical Education Center (Brazilian Navy), Rio de Janeiro, Brazil
| | - Vanessa K Coelho
- B.S.Q.G., V.K.C. Rehabilitation Science Department, Augusto Motta University Center (UNISUAM), Rio de Janeiro, Brazil and Physical Therapy Department, Admiral Adalberto Nunes Physical Education Center (Brazilian Navy), Rio de Janeiro, Brazil
| | - Bruno S Terra
- B.S.T. Physical Therapy Department, Admiral Adalberto Nunes Physical Education Center (Brazilian Navy), Rio de Janeiro, Brazil
| | - Priscila S Bunn
- P.S.B. Physical Therapy Department, Admiral Adalberto Nunes Physical Education Center (Brazilian Navy), Rio de Janeiro, Brazil and Exercise and Sport Sciences Department, State University of Rio de Janeiro (UERJ), Rio de Janeiro, Brazil
| | - Bruno T Saragiotto
- B.T.S. Musculoskeletal Division, School of Public Health, Sydney Medical School, The University of Sydney, Sydney, Australia
| | - Arthur S Ferreira
- A.S.F. Rehabilitation Science Department, Augusto Motta University Center (UNISUAM), Rio de Janeiro, Brazil
| | - Leandro A C Nogueira
- L.A.C.N. Rehabilitation Science Department, Augusto Motta University Center (UNISUAM), Rio de Janeiro, Brazil and Physical Therapy Department, Federal Institute of Rio de Janeiro (IFRJ), Rio de Janeiro, Brazil
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Testa M, Geri T, Pitance L, Lentz P, Gizzi L, Erlenwein J, Petkze F, Falla D. Alterations in jaw clenching force control in people with myogenic temporomandibular disorders. J Electromyogr Kinesiol 2018; 43:111-117. [DOI: 10.1016/j.jelekin.2018.07.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Revised: 07/23/2018] [Accepted: 07/25/2018] [Indexed: 11/26/2022] Open
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Increased co-contraction of arm adductors is associated with a favorable course in subacromial pain syndrome. J Shoulder Elbow Surg 2018; 27:1925-1931. [PMID: 30243903 DOI: 10.1016/j.jse.2018.06.015] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Revised: 06/05/2018] [Accepted: 06/13/2018] [Indexed: 02/01/2023]
Abstract
BACKGROUND Enhancement of arm adductor activity during abduction (ie, adductor co-contraction), may be effective in the treatment of subacromial pain syndrome (SAPS). We assessed whether an increase of adductor co-contraction is associated with a favorable course of SAPS. METHODS At baseline and after nearly 4 years of follow-up, electromyography of the latissimus dorsi (LD), teres major (TM), pectoralis major, and deltoid muscle was obtained during isometric abduction and adduction tasks in 26 patients with SAPS. Changes in co-contraction were assessed with change in the activation ratio (ΔAR). The AR ranges between -1 and 1, where lower values indicate more co-contraction. Clinical course was determined from an anchor question (reduced, persistent, or increased complaints), the visual analog scale for pain (VAS), and the Western Ontario Rotator Cuff score (WORC). RESULTS In patients indicating persistent complaints (31%), the VAS and WORC remained stable. In patients who indicated reduced complaints (69%), the VAS reduced (z score, -3.4; P = .001) and WORC increased (z score, 3.6; P < .001). Unchanged ARs associated with complaints persistence, whereas decreased AR of the LD (ΔARLD, -0.21; 95% confidence interval [CI], -0.36 to -0.06) and TM (ΔARTM, -0.17; 95% CI, -0.34 to -0.00) coincided with reduced complaints. There was a significant between-group difference in ΔARLD (-0.35; 95% CI, -0.60 to 0.10) and ΔARTM (-0.36; 95% CI, -0.66 to -0.05). CONCLUSIONS Increased co-contraction of the LD and TM is associated with a favorable course of SAPS. This may be explained by widening of the subacromial space accomplished by adductor co-contraction.
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Umehara J, Kusano K, Nakamura M, Morishita K, Nishishita S, Tanaka H, Shimizu I, Ichihashi N. Scapular kinematic and shoulder muscle activity alterations after serratus anterior muscle fatigue. J Shoulder Elbow Surg 2018; 27:1205-1213. [PMID: 29478944 DOI: 10.1016/j.jse.2018.01.009] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/22/2017] [Revised: 12/24/2017] [Accepted: 01/07/2018] [Indexed: 02/01/2023]
Abstract
BACKGROUND Although the serratus anterior muscle has an important role in scapular movement, no study to date has investigated the effect of serratus anterior fatigue on scapular kinematics and shoulder muscle activity. The purpose of this study was to clarify the effect of serratus anterior fatigue on scapular movement and shoulder muscle activity. METHODS The study participants were 16 healthy men. Electrical muscle stimulation was used to fatigue the serratus anterior muscle. Shoulder muscle strength and endurance, scapular movement, and muscle activity were measured before and after the fatigue task. The muscle activity of the serratus anterior, upper and lower trapezius, anterior and middle deltoid, and infraspinatus muscles was recorded, and the median power frequency of these muscles was calculated to examine the degree of muscle fatigue. RESULTS The muscle endurance and median power frequency of the serratus anterior muscle decreased after the fatigue tasks, whereas the muscle activities of the serratus anterior, upper trapezius, and infraspinatus muscles increased. External rotation of the scapula at the shoulder elevated position increased after the fatigue task. CONCLUSION Selective serratus anterior fatigue due to electric muscle stimulation decreased the serratus anterior endurance at the flexed shoulder position. Furthermore, the muscle activities of the serratus anterior, upper trapezius, and infraspinatus increased and the scapular external rotation was greater after serratus anterior fatigue. These results suggest that the rotator cuff and scapular muscle compensated to avoid the increase in internal rotation of the scapula caused by the dysfunction of the serratus anterior muscle.
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Affiliation(s)
- Jun Umehara
- Human Health Sciences, Graduate School of Medicine, Kyoto University, Kyoto, Japan.
| | - Ken Kusano
- ASICS Corporation, Institution of Sport Science, Kobe, Japan
| | - Masatoshi Nakamura
- Institute for Human Movement and Medical Sciences, Niitaga University of Health and Welfare, Niigata, Japan
| | - Katsuyuki Morishita
- Human Health Sciences, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Satoru Nishishita
- Human Health Sciences, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Hiroki Tanaka
- Rehabilitation Unit, Kyoto University Hospital, Kyoto, Japan
| | - Itsuroh Shimizu
- Department of Physical Therapy, Fukui General Clinic, Fukui, Japan
| | - Noriaki Ichihashi
- Human Health Sciences, Graduate School of Medicine, Kyoto University, Kyoto, Japan
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Ayatollahi K, Okhovatian F, Kalantari K, Baghban A. A comparison of scapulothoracic muscle electromyographic activity in subjects with and without subacromial impingement syndrome during a functional task. J Bodyw Mov Ther 2017; 21:719-724. [DOI: 10.1016/j.jbmt.2016.12.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Revised: 11/18/2016] [Accepted: 11/29/2016] [Indexed: 10/20/2022]
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Ettinger LR, Shapiro M, Karduna A. Subacromial Anesthetics Increase Proprioceptive Deficit in the Shoulder and Elbow in Patients With Subacromial Impingement Syndrome. CLINICAL MEDICINE INSIGHTS-ARTHRITIS AND MUSCULOSKELETAL DISORDERS 2017. [PMID: 28638243 PMCID: PMC5470851 DOI: 10.1177/1179544117713196] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Shoulder proprioception gives information regarding arm joint position and movement direction. Several studies have investigated shoulder proprioceptive acuity in patients with subacromial impingement syndrome (SIS); however, differences in protocols and between-subjects designs have limited scientific inferences regarding proprioception and SIS. We aimed to determine within-subject differences in shoulder and elbow proprioceptive acuity in 17 patients with stage 2 SIS following treatment of a local anesthetic injection. In addition, we used 17 healthy, age-, sex-, and arm dominance–matched controls to determine the magnitude of differences after treatment. Joint position sense (JPS) was measured before and after treatment in both groups in the sagittal plane for the shoulder and elbow. Our results indicate that patients with SIS have less sensitivity to angular position and tended to overshoot their targets with greater variability during angle-matching tasks for the shoulder (1.8° difference, P = .042) and elbow (5.6° difference, P = .001) than controls. The disparities in JPS found in patients with SIS were not resolved following subacromial injection; in fact, the magnitude of the errors increased after treatment where postinjection errors were significantly greater (P = .046) than controls, with an average difference of 2.4°. These findings suggest that patients with SIS have decrements in either the signaling or processing of proprioceptive information and may use pain to reduce these inequalities.
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Affiliation(s)
- Lucas R Ettinger
- Department of Exercise Science, Willamette University, Salem, OR, USA
| | - Matthew Shapiro
- Slocum Center for Orthopedics & Sports Medicine, Eugene, OR, USA
| | - Andrew Karduna
- Department of Human Physiology, University of Oregon, Eugene, OR, USA
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de Oliveira FCL, Bouyer LJ, Ager AL, Roy JS. Electromyographic analysis of rotator cuff muscles in patients with rotator cuff tendinopathy: A systematic review. J Electromyogr Kinesiol 2017. [PMID: 28641171 DOI: 10.1016/j.jelekin.2017.06.002] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The shoulder is inherently an unstable joint which heavily relies on the neuromuscular activation of the rotator cuff (RC) complex for stability during movement. Currently, there is no consensus regarding how the activity of RC muscles is affected among individuals with a RC tendinopathy (RCTe). This study reviewed the evidence of studies comparing the electromyographic (EMG) activity of any RC muscle of shoulders with a symptomatic RCTe to asymptomatic shoulders. Eight databases were searched. Data from 343 participants (201 symptomatic and 209 asymptomatic shoulders) were analyzed from 10 out of 402 included studies. Strong evidence for the infraspinatus and supraspinatus during isometric contractions and limited evidence for the supraspinatus and infraspinatus during isokinetic contractions suggest that the muscular activity is not altered among individuals with a RCTe during these types of contraction. Very limited evidence indicates reduced muscle activity for the infraspinatus and subscapularis in the presence of a RCTe during isotonic contractions, and no alterations for the supraspinatus or teres minor were identified. Lastly, conflicting to moderate evidence suggests alterations in RC muscle activity during unrestrained movements and swimming. These findings indicate that EMG deficits associated with a RCTe can best be appreciated during unrestrained movements.
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Affiliation(s)
- Fábio Carlos Lucas de Oliveira
- Center for Interdisciplinary Research in Rehabilitation and Social Integration, CIUSS-CN, Quebec City, Canada; Faculty of Medicine, Laval University, Québec City, Canada.
| | - Laurent Julien Bouyer
- Center for Interdisciplinary Research in Rehabilitation and Social Integration, CIUSS-CN, Quebec City, Canada; Faculty of Medicine, Laval University, Québec City, Canada.
| | - Amanda L Ager
- Center for Interdisciplinary Research in Rehabilitation and Social Integration, CIUSS-CN, Quebec City, Canada; Faculty of Medicine, Laval University, Québec City, Canada.
| | - Jean-Sébastien Roy
- Center for Interdisciplinary Research in Rehabilitation and Social Integration, CIUSS-CN, Quebec City, Canada; Faculty of Medicine, Laval University, Québec City, Canada.
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Kinsella R, Pizzari T. Electromyographic activity of the shoulder muscles during rehabilitation exercises in subjects with and without subacromial pain syndrome: a systematic review. Shoulder Elbow 2017; 9:112-126. [PMID: 28405223 PMCID: PMC5384534 DOI: 10.1177/1758573216660038] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/18/2016] [Accepted: 06/27/2016] [Indexed: 01/01/2023]
Abstract
BACKGROUND Subacromial pain syndrome (SPS) is a common cause of shoulder pain and muscle activity deficits are postulated to contribute to the development and progression of the disorder. The purpose of this systematic review was to definitively determine whether evidence exists of differences in electromyography (EMG) characteristics between subjects with and without SPS. METHODS Six key databases were searched: MEDLINE, EMBASE, CINAHL, SPORTdiscus, PEDro and The Cochrane Library (inception to May 2016). The search yielded 1414 records using terms relating to shoulder impingement, EMG, scapular and rotator cuff muscles. Twenty-two papers remained once duplicates were removed and selection criteria applied. Data extraction, quality assessment and data synthesis were performed. Effect sizes and 95% confidence intervals were calculated. RESULTS There was limited evidence that serratus anterior has lower amplitude, delayed activation and earlier termination in SPS participants. For the majority of muscles, regardless of task, load or arm position, significant differences were not demonstrated or results were contradictory. CONCLUSIONS The understanding of SPS is changing and EMG appears unable to capture the complexities associated with this condition. Addressing aberrant movement patterns and facilitating balanced activation of all shoulder muscles may be a more appropriate treatment direction for the future.
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Affiliation(s)
- Rita Kinsella
- Rita Kinsella, La Trobe Sport and Exercise Medicine Research Centre, School of Allied Health, College of Science, Health and Engineering, La Trobe University, Melbourne 3086, Australia.
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Castelein B, Cools A, Parlevliet T, Cagnie B. The influence of induced shoulder muscle pain on rotator cuff and scapulothoracic muscle activity during elevation of the arm. J Shoulder Elbow Surg 2017; 26:497-505. [PMID: 27751718 DOI: 10.1016/j.jse.2016.09.005] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/16/2015] [Revised: 09/05/2016] [Accepted: 09/07/2016] [Indexed: 02/01/2023]
Abstract
BACKGROUND Altered recruitment of rotator cuff and scapulothoracic muscles has been identified in patients with subacromial impingement syndrome. To date, however, the cause-consequence relationship between pain and altered muscle recruitment has not been fully unraveled. METHODS The effect of experimental shoulder pain induced by injection of hypertonic saline in the supraspinatus on the activity of the supraspinatus, infraspinatus, subscapularis, trapezius, and serratus anterior activity was investigated during the performance of an elevation task by use of muscle functional magnetic resonance imaging in 25 healthy individuals. Measurements were taken at 4 levels (C6-C7, T2-T3, T3-T4, and T6-T7) at rest and after the elevation task performed without and with experimental shoulder pain. RESULTS During arm elevation, experimentally induced pain caused a significant activity reduction, expressed as reduction in T2 shift of the IS (P = .029). No significant changes in T2 shift values were found for the other rotator cuff muscles or the scapulothoracic muscles. CONCLUSIONS This study demonstrates that acute experimental shoulder pain has an inhibitory effect on the activity of the IS during arm elevation. Acute experimental shoulder pain did not seem to influence the scapulothoracic muscle activity significantly. The findings suggest that rotator cuff muscle function (infraspinatus) should be a consideration in the early management of patients with shoulder pain.
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Affiliation(s)
- Birgit Castelein
- Department of Rehabilitation Sciences and Physiotherapy, Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium.
| | - Ann Cools
- Department of Rehabilitation Sciences and Physiotherapy, Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium
| | - Thierry Parlevliet
- Department of Physical Medicine and Orthopedic Surgery, University Hospital, Ghent, Belgium
| | - Barbara Cagnie
- Department of Rehabilitation Sciences and Physiotherapy, Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium
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Oh JS, Kang MH, Dvir Z. Reproducibility of isometric shoulder protraction and retraction strength measurements in normal subjects and individuals with winged scapula. J Shoulder Elbow Surg 2016; 25:1816-1823. [PMID: 27262411 DOI: 10.1016/j.jse.2016.03.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/08/2015] [Revised: 02/25/2016] [Accepted: 03/13/2016] [Indexed: 02/01/2023]
Abstract
BACKGROUND The strength of the shoulder protractors and retractors may be compromised in individuals with winged scapula (IwWS). However, no standard approach to measuring the strength of these muscles has been described. The aim of this study was to study the intra-rater and inter-rater reproducibility of a fixed-base isometric dynamometer and to describe cutoff scores for clinically meaningful change for protraction and retraction isometric strength. METHOD Twice during a week, 20 normal subjects and 20 IwWS were tested by 2 independent raters. RESULTS IwWS were significantly weaker (P < .001) than control subjects in their protraction and retraction isometric strength. Excellent intra-rater and inter-rater correlations were obtained in most combinations, leading to low cutoff scores for meaningful change expressed in terms of the smallest real difference. CONCLUSION When it is properly used, the technique described in this paper is recommended as an effective clinical tool for the quantitative assessment of protraction and retraction isometric strength, both for status determination and for monitoring of change in IwWS during and after rehabilitation.
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Affiliation(s)
- Jae-Seop Oh
- Department of Physical Therapy, College of Biomedical Science and Engineering, Inje University, Gimhae, Republic of Korea
| | - Min-Hyeok Kang
- Department of Physical Therapy, Graduate School, Inje University, Gimhae, Republic of Korea
| | - Zeevi Dvir
- Department of Physical Therapy, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.
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Michener LA, Sharma S, Cools AM, Timmons MK. Relative scapular muscle activity ratios are altered in subacromial pain syndrome. J Shoulder Elbow Surg 2016; 25:1861-1867. [PMID: 27374236 DOI: 10.1016/j.jse.2016.04.010] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/06/2015] [Revised: 03/22/2016] [Accepted: 04/05/2016] [Indexed: 02/01/2023]
Abstract
BACKGROUND Coordinated muscle activity is needed for synchronized joint motion and stability. Characterizing relative scapular muscle activity deficits in participants with shoulder pain will provide foundational knowledge to develop rehabilitation programs. METHODS Participants were recruited with subacromial pain syndrome and an asymptomatic control group matched for age, gender, and dominant arm (N = 56). Surface electromyographic muscle activity was recorded from the upper, middle, and lower trapezius (UT, MT, LT) and serratus anterior (SA) during 5 repetitions of a weighted arm elevation task. Muscle activity was normalized to a reference contraction and then expressed as UT/MT, UT/LT, UT/SA, and LT/SA ratios. Ratios were compared between groups and across 3 arm angle intervals during ascending and descending elevation. RESULTS A 2 × 3 mixed-model analysis of variance yielded a group main effect for the UT/LT ratio, with a higher ratio in the subacromial pain group during ascending (mean difference, 0.92; P = .008) and descending (mean difference, 0.70; P = .030). For the LT/SA ratio, there was a group effect: a lower ratio in the subacromial group during ascending (mean difference, -0.25; P = .026) and descending (mean difference, -0.51; P = .032). There were no differences for the UT/MT or UT/SA. DISCUSSION There is a disruption in coordination between the LT and SA and the UT and LT during an arm elevation task in patients with subacromial pain syndrome. The LT was part of both altered ratios, indicating the relative importance of the LT. Future research should determine if exercises aimed at restoring the dysfunctional LT/SA and UT/LT force couples are beneficial to reduce shoulder pain and disability in patients with unilateral shoulder pain.
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Affiliation(s)
- Lori A Michener
- Division of Biokinesiology and Physical Therapy, University of Southern California, Los Angeles, CA, USA.
| | - Sapna Sharma
- Division of Biokinesiology and Physical Therapy, University of Southern California, Los Angeles, CA, USA
| | - Ann M Cools
- Department of Rehabilitation Sciences and Physiotherapy, Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium
| | - Mark K Timmons
- School of Kinesiology, Marshall University, Huntington, WV, USA
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Efficacy of Proprioceptive Exercises in Patients with Subacromial Impingement Syndrome: A Single-Blinded Randomized Controlled Study. Am J Phys Med Rehabil 2016; 95:169-82. [PMID: 26098920 DOI: 10.1097/phm.0000000000000327] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
OBJECTIVE The objective of this study was to evaluate the effectiveness of proprioceptive exercises on shoulder proprioception, range of motion, pain, muscle strength, and function in patients with subacromial impingement syndrome. DESIGN Sixty-one patients with subacromial impingement syndrome participated in this prospective, single-blind randomized controlled trial. All patients were randomly divided into two groups: control group (conventional physiotherapy, n = 30) and intervention group (proprioceptive exercise and conventional physiotherapy, n = 31). The primary outcome measures were sense of kinesthesia and active and passive repositioning for proprioception at 0 degrees and 10 degrees external rotation at 12 wks. The secondary outcome measures were pain at rest, at night, and during activities of daily living with the visual analog scale (0-10 cm), the Western Ontario Rotator Cuff index, the American Shoulder and Elbow Surgeons index, range of motion, and isometric muscle strength at both 6 and 12 wks. RESULTS After treatment, significant improvement was found in range of motion, pain, isometric muscle strength, kinesthesia at 0 degrees external rotation, and functional tests in both groups. The intervention group showed a significant improvement in kinesthesia at 10 degrees external rotation and active and passive repositioning at 10 degrees external rotation. When groups were compared, there were no statistically significant differences in any of the parameters at 12 wks. CONCLUSIONS Although proprioceptive exercises may provide better proprioceptive acuity, no additional positive effect on other clinical parameters was observed.
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Maenhout A, Benzoor M, Werin M, Cools A. Scapular muscle activity in a variety of plyometric exercises. J Electromyogr Kinesiol 2016; 27:39-45. [DOI: 10.1016/j.jelekin.2016.01.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2015] [Revised: 11/26/2015] [Accepted: 01/15/2016] [Indexed: 10/22/2022] Open
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Scapulothoracic muscle activity during elevation exercises measured with surface and fine wire EMG: A comparative study between patients with subacromial impingement syndrome and healthy controls. ACTA ACUST UNITED AC 2016; 23:33-9. [PMID: 27183834 DOI: 10.1016/j.math.2016.03.007] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2015] [Revised: 03/08/2016] [Accepted: 03/11/2016] [Indexed: 11/21/2022]
Abstract
BACKGROUND The quality of the scapular movement depends on the coordinated activity of the surrounding scapulothoracic muscles. Besides the well-known changes in Trapezius and Serratus Anterior (SA) activity in patients with subacromial impingement syndrome (SIS), no studies exist that have investigated the activity of the smaller less superficial muscles that attach on the scapula (Pectoralis Minor (Pm), the Levator Scapulae (LS) and the Rhomboid Major (RM)) in a population with SIS, despite the hypothesized importance of these muscles in shoulder function. OBJECTIVES To investigate if patients with shoulder impingement syndrome (SIS) show differences in deeper and superficial lying scapulothoracic muscle activity in comparison with a healthy control group during arm elevation tasks. STUDY DESIGN Controlled laboratory study. METHODS Activity of the deeper lying (LS, Pm and RM) and superficial lying scapulothoracic muscles (Trapezius and SA) was investigated with fine-wire and surface electromyography (EMG) in 17 subjects with SIS and 20 healthy subjects while performing 3 elevation tasks: scaption, wall slide and elevation with external rotation. Possible differences between the groups were studied with a linear mixed model (factor "group" and "exercise"). RESULTS For the Pm only, a significant main effect for "Group" was found: during the elevation exercises, the Pm was significantly more active in the SIS group in comparison with the healthy controls. CONCLUSION Patients with SIS show significantly higher Pm activity during elevation tasks in comparison with healthy controls. This study supports the idea of a possible role of the Pm in SIS.
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Sundstrup E, Jakobsen MD, Brandt M, Jay K, Aagaard P, Andersen LL. Associations between biopsychosocial factors and chronic upper limb pain among slaughterhouse workers: cross sectional study. BMC Musculoskelet Disord 2016; 17:104. [PMID: 26919829 PMCID: PMC4769589 DOI: 10.1186/s12891-016-0953-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/26/2015] [Accepted: 02/17/2016] [Indexed: 01/22/2023] Open
Abstract
Background Knowledge of factors associated with chronic pain is necessary for preventive strategies. The present study investigates biopsychosocial differences, with specific focus on rate of force development (RFD) and work ability, between workers with and without chronic upper limb pain. Methods Eighty-two male slaughterhouse workers, 49 with chronic upper limb pain and 33 pain-free controls participated in the study. Maximal muscle strength, RFD, and muscle activity was determined from fast and forceful maximal voluntary contractions for the shoulder and hand. Participants filled out a questionnaire on work ability (work ability index), work disability (Work module of DASH questionnaire), fear avoidance, and self-rated health. Additionally, pressure pain threshold (PPT) was measured in muscles of the arm, shoulder and lower leg. Results Muscle strength and RFD (determined within time intervals of 30, 50, 100, and 200 ms relative to onset of contraction) was 28 % and 58–78 % lower, respectively, in workers with chronic pain compared with pain-free controls, and paralleled by reduced muscle activity (all p < 0.001). Workers with chronic pain had lower PPT of the arm, shoulder and lower leg (p < 0.01), and reported impaired work ability index score and general health along with higher work disability and fear avoidance compared with controls (all p < 0.0001). No differences were observed between the groups in regard to age, BMI, physical activity level, job position and duration of slaughterhouse work (all p > 0.4). Conclusions Chronic upper limb pain was paralleled by reduced neuromuscular function of the shoulder and hand along with impaired work ability, work disability and general health. Future studies on chronic pain management at the workplace should carefully consider the biopsychosocial nature of pain when designing and implementing preventive strategies.
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Affiliation(s)
- Emil Sundstrup
- National Research Centre for the Working Environment, Lersø Parkalle 105, Copenhagen, Denmark. .,Institute for Sports Science and Clinical Biomechanics, SDU Muscle Research Cluster (SMRC), University of Southern Denmark, Odense, Denmark.
| | - Markus D Jakobsen
- National Research Centre for the Working Environment, Lersø Parkalle 105, Copenhagen, Denmark.,Institute for Sports Science and Clinical Biomechanics, SDU Muscle Research Cluster (SMRC), University of Southern Denmark, Odense, Denmark
| | - Mikkel Brandt
- National Research Centre for the Working Environment, Lersø Parkalle 105, Copenhagen, Denmark.,Physical Activity and Human Performance Group, Center for Sensory-Motor Interaction, Department of Health Science and Technology, Aalborg University, Aalborg, Denmark
| | - Kenneth Jay
- National Research Centre for the Working Environment, Lersø Parkalle 105, Copenhagen, Denmark.,Institute for Sport and Clinical Biomechanics, Department of physical activity and health, University of Southern Denmark, Odense, Denmark
| | - Per Aagaard
- Institute for Sports Science and Clinical Biomechanics, SDU Muscle Research Cluster (SMRC), University of Southern Denmark, Odense, Denmark
| | - Lars L Andersen
- National Research Centre for the Working Environment, Lersø Parkalle 105, Copenhagen, Denmark.,Physical Activity and Human Performance Group, Center for Sensory-Motor Interaction, Department of Health Science and Technology, Aalborg University, Aalborg, Denmark
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Bachasson D, Singh A, Shah S, Lane JG, Ward SR. The role of the peripheral and central nervous systems in rotator cuff disease. J Shoulder Elbow Surg 2015; 24:1322-35. [PMID: 26189809 PMCID: PMC4508670 DOI: 10.1016/j.jse.2015.04.004] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/02/2014] [Revised: 03/19/2015] [Accepted: 04/04/2015] [Indexed: 02/01/2023]
Abstract
Rotator cuff (RC) disease is an extremely common condition associated with shoulder pain, reduced functional capacities, and impaired quality of life. It primarily involves alterations in tendon health and mechanical properties that can ultimately lead to tendon failure. RC tendon tears induce progressive muscle changes that have a negative impact on surgical reparability of the RC tendons and clinical outcomes. At the same time, a significant base of clinical data suggests a relatively weak relationship between RC integrity and clinical presentation, emphasizing the multifactorial aspects of RC disease. This review aims to summarize the potential contribution of peripheral, spinal, and supraspinal neural factors that may (1) exacerbate structural and functional muscle changes induced by tendon tear, (2) compromise the reversal of these changes during surgery and rehabilitation, (3) contribute to pain generation and persistence of pain, (4) impair shoulder function through reduced proprioception, kinematics, and muscle recruitment, and (5) help explain interindividual differences and response to treatment. Given the current clinical and scientific interest in peripheral nerve injury in the context of RC disease and surgery, we carefully reviewed this body of literature with a particular emphasis on suprascapular neuropathy that has generated a large number of studies in the past decade. Within this process, we highlight the gaps in current knowledge and suggest research avenues for scientists and clinicians.
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Affiliation(s)
- Damien Bachasson
- Department of Radiology, University of California San Diego, La Jolla, CA, USA
| | - Anshuman Singh
- Department of Orthopaedics, Kaiser Permanente Southern California, San Diego, CA, USA
| | - Sameer Shah
- Department of Orthopaedic Surgery, University of California San Diego, La Jolla, CA, USA,Department of Bioengineering, University of California San Diego, La Jolla, CA, USA
| | | | - Samuel R. Ward
- Department of Radiology, University of California San Diego, La Jolla, CA, USA,Department of Orthopaedic Surgery, University of California San Diego, La Jolla, CA, USA,Department of Bioengineering, University of California San Diego, La Jolla, CA, USA
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Kim SY, Kang MH, Lee DK, Oh JS. Effects of the Neurac(®) technique in patients with acute-phase subacromial impingement syndrome. J Phys Ther Sci 2015; 27:1407-9. [PMID: 26157230 PMCID: PMC4483408 DOI: 10.1589/jpts.27.1407] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2014] [Accepted: 01/11/2015] [Indexed: 11/30/2022] Open
Abstract
[Purpose] This study investigated the effects of the Neurac technique on shoulder pain,
function, and range of motion in patients with acute-phase subacromial impingement
syndrome. [Subjects] Thirteen patients (seven females and six males) with acute-phase
subacromial impingement syndrome participated in this study. [Methods] Shoulder pain,
function, and range of motion were assessed before and after the application of the Neurac
technique. [Results] Pain and function scores were significantly lower after than before
the Neurac intervention. Shoulder range of motion was significantly greater after Neurac
intervention than before it. [Conclusion] The Neurac technique is a useful intervention
for patients with acute-phase subacromial impingement syndrome.
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Affiliation(s)
- Soo-Yong Kim
- Department of Rehabilitation Science, Graduate School, Inje University, Republic of Korea
| | - Min-Hyeok Kang
- Department of Rehabilitation Science, Graduate School, Inje University, Republic of Korea
| | - Dong-Kyu Lee
- Department of Rehabilitation Science, Graduate School, Inje University, Republic of Korea
| | - Jae-Seop Oh
- Department of Physical Therapy, College of Biomedical Science and Engineering, Inje University, Republic of Korea
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Naef F, Grace S, Crowley-McHattan Z, Hardy D, McLeod A. The effect of chronic shoulder pain on maximal force of shoulder abduction. J Bodyw Mov Ther 2015; 19:410-6. [DOI: 10.1016/j.jbmt.2014.08.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2014] [Revised: 08/08/2014] [Accepted: 08/10/2014] [Indexed: 10/24/2022]
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Dos Santos GL, Salazar LFG, Lazarin AC, de Russo TL. Joint position sense is bilaterally reduced for shoulder abduction and flexion in chronic hemiparetic individuals. Top Stroke Rehabil 2015; 22:271-80. [PMID: 26258452 DOI: 10.1179/1074935714z.0000000014] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
BACKGROUND The stroke is the leading cause of adult disability in the world. One of the main complaints of individuals post-stroke refers to the loss of function of the upper limb, as evidenced during the performance of activities of daily living. This difficulty may be related to an important component of sensorimotor control, joint position sense, a submodality of proprioception. OBJECTIVES To investigate whether the proprioception of both shoulders of chronic hemiparetic patients is altered during abduction and flexion. METHODS Thirteen subjects with chronic hemiparesis due to ischemic stroke and 13 healthy subjects matched for gender and age was included. The joint sense position was assessed using a dynamometer. Absolute error for shoulder abduction and flexion at the 30 and 60° was calculated. RESULTS No difference was found between the paretic and non-paretic limbs in movements at both 30 and 60°. Higher values of absolute error for both paretic and non-paretic limbs compared to the control were observed during abduction at 30 and at 60°. CONCLUSIONS Chronic ischemic post-stroke patients have bilateral proprioceptive deficits in the shoulder during abduction and flexion. But these deficits are dependent on the movement performed and the angle tested. The results demonstrate the need to include bilateral exercises and/or visual feedback in the rehabilitation program.
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Mista CA, Christensen SW, Graven-Nielsen T. Modulation of motor variability related to experimental muscle pain during elbow-flexion contractions. Hum Mov Sci 2015; 39:222-35. [DOI: 10.1016/j.humov.2014.09.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2014] [Revised: 07/30/2014] [Accepted: 09/17/2014] [Indexed: 11/29/2022]
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Struyf F, Cagnie B, Cools A, Baert I, Brempt JV, Struyf P, Meeus M. Scapulothoracic muscle activity and recruitment timing in patients with shoulder impingement symptoms and glenohumeral instability. J Electromyogr Kinesiol 2013; 24:277-84. [PMID: 24389333 DOI: 10.1016/j.jelekin.2013.12.002] [Citation(s) in RCA: 89] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2013] [Accepted: 12/04/2013] [Indexed: 11/17/2022] Open
Abstract
BACKGROUND Various studies have investigated scapulothoracic muscle activity and recruitment patterns in relation to shoulder complaints in different populations, but a consensus review is lacking. HYPOTHESIS/PURPOSE To systematically review the state of the art regarding scapulothoracic muscle activity and recruitment timing in subjects with shoulder pain compared to pain free controls. STUDY DESIGN Systematic review. METHODS The search for relevant articles was performed in Pubmed and Web of Science, including Web of Knowledge, using key words related to shoulder pain, scapulothoracic muscle activity or recruitment timing. Articles were included till November 2012. Case-control studies concerning the scapulothoracic region and muscle recruitment using electromyography (EMG) were included. Articles regarding rotator cuff muscles or neck-shoulder pathologies or studies handling a treatment outcome, were excluded. The methodological quality of the articles was assessed using appropriate risk of bias criteria for case-control studies. RESULTS A total of 12 articles were included in the systematic review, containing patients with Shoulder Impingement Syndrome (SIS) or glenohumeral instability. In patients with SIS 3 out of 6 articles showed increased upper trapezius muscle (UT) activity, 3 out of 5 studies showed decreased lower trapezius muscle (LT) activity and 3 out of 5 articles showed decreased serratus anterior muscle (SA) activity. Patients with glenohumeral instability showed contradictory results on scapulothoracic muscle activity patterns. In both SIS and glenohumeral instability patients, no consensus was found on muscle recruitment timing. CONCLUSION Patients with SIS and glenohumeral instability display numerous variations in scapulothoracic muscle activity compared to healthy controls. In the SIS-group, the LT and SA muscle activity is decreased. In addition, the UT muscle activity is increased among the SIS patients, whereas no clear change is seen among patients with glenohumeral instability. Although the scapulothoracic muscle activity changed, no consensus could be made regarding muscle recruitment timing.
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Affiliation(s)
- Filip Struyf
- Department of Rehabilitation Sciences and Physiotherapy, Faculty of Medicine and Health Sciences, University of Antwerp, Belgium; "Pain in Motion" Research Group(1).
| | - Barbara Cagnie
- Rehabilitation Sciences and Physiotherapy, Ghent University, Ghent, Belgium
| | - Ann Cools
- Rehabilitation Sciences and Physiotherapy, Ghent University, Ghent, Belgium
| | - Isabel Baert
- Department of Rehabilitation Sciences and Physiotherapy, Faculty of Medicine and Health Sciences, University of Antwerp, Belgium; "Pain in Motion" Research Group(1)
| | - Jolien Van Brempt
- Department of Rehabilitation Sciences and Physiotherapy, Faculty of Medicine and Health Sciences, University of Antwerp, Belgium
| | - Pieter Struyf
- Department of Rehabilitation Medicine, Orbis Medical Centre, Sittard, The Netherlands
| | - Mira Meeus
- Department of Rehabilitation Sciences and Physiotherapy, Faculty of Medicine and Health Sciences, University of Antwerp, Belgium; "Pain in Motion" Research Group(1); Rehabilitation Sciences and Physiotherapy, Ghent University, Ghent, Belgium
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Saccol MF, Zanca GG, Ejnisman B, de Mello MT, Mattiello SM. Shoulder rotator strength and torque steadiness in athletes with anterior shoulder instability or SLAP lesion. J Sci Med Sport 2013; 17:463-8. [PMID: 24268439 DOI: 10.1016/j.jsams.2013.10.246] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2013] [Revised: 10/07/2013] [Accepted: 10/13/2013] [Indexed: 11/16/2022]
Abstract
OBJECTIVES To investigate shoulder rotator strength and steadiness in athletes with anterior instability and superior labrum anterior posterior (SLAP) lesion. DESIGN Cross-sectional laboratory study. METHODS Athletes with anterior shoulder instability (instability group, n=10) and a SLAP lesion (SLAP group, n=10) were compared with healthy athletes matched by age, anthropometrics and sport (control group for shoulder instability, n=10 and control group for SLAP, n=10). Torque steadiness was evaluated with three 10s submaximal isometric contractions (35% of peak torque) with the arm at 90° of shoulder abduction and 90° of external rotation. The mean isometric torque, standard deviation and coefficient of variation were measured from the steadiness trials. To evaluate shoulder rotator strength, concentric isokinetic tests (90°/s, 180°/s) were performed at the 90-90° position and peak torque to body mass and shoulder external to internal rotation ratio variables were analyzed. The variables were tested with the instability and control groups with respect to shoulder instability and between the SLAP and control groups for SLAP lesion using the Mann-Whitney test. RESULTS The SLAP group presented a higher coefficient of variation than the SLAP control group (p=0.003). Regarding shoulder strength, the internal and external shoulder rotators were weaker in the instability group than in the instability control group (p<0.05). CONCLUSIONS Athletes with anterior shoulder instability presented shoulder rotation weakness, while athletes with a SLAP lesion showed higher torque fluctuation during internal rotation. These results indicate that there are different alterations to strength and sensory motor control in each condition.
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Affiliation(s)
| | - Gisele Garcia Zanca
- Department of Physical Therapy, Federal University of São Carlos, São Carlos, Brazil
| | - Benno Ejnisman
- Department of Orthopaedic Surgery and Sports Medicine, Federal University of São Paulo, São Paulo, Brazil
| | - Marco Túlio de Mello
- Center of Studies on Psychobiology and Exercise, Department of Psychobiology, Federal University of São Paulo, São Paulo, Brazil
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Dulgeroglu D, Kirbiyik E, Ersoz M, Ozel S. Evaluation of Shoulder Rotational Strength in Patients with Subacromial Impingement Syndrome Using a Computerized Isokinetic Dynamometer. ACTA ACUST UNITED AC 2013. [DOI: 10.3109/10582452.2013.763393] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Zanca GG, Saccol MF, Oliveira AB, Mattiello SM. Shoulder internal and external rotations torque steadiness in overhead athletes with and without impingement symptoms. J Sci Med Sport 2012; 16:433-7. [PMID: 23088897 DOI: 10.1016/j.jsams.2012.09.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2012] [Revised: 08/23/2012] [Accepted: 09/21/2012] [Indexed: 11/25/2022]
Abstract
OBJECTIVES This study aimed to investigate torque steadiness of shoulder internal and external rotations in regularly training overhead athletes with and without impingement symptoms. DESIGN Cross-sectional laboratory study. METHODS Three groups were evaluated: athletes with impingement symptoms (n=21), asymptomatic athletes (n=25) and non-athletes (n=21). To assess torque steadiness, the participants performed 3 submaximal contractions (35% of peak torque) for 10s each, with the arm at 90° of shoulder abduction and 90° of external rotation. The standard deviation, coefficient of variation, mean exerted torque and time to stability were measured from the steadiness trials. RESULTS The standard deviation of internal rotation was higher in asymptomatic athletes than in non-athletes (p<0.01); however, there was no difference between the athletes with impingement symptoms and the other groups. The other variables presented no differences among the groups. CONCLUSIONS Higher torque fluctuation of shoulder internal rotation in asymptomatic athletes may point to neuromuscular adaptations related to throwing training. However, the steadiness patterns of athletes with impingement symptoms did not differ from those of asymptomatic athletes or non-athletes.
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Affiliation(s)
- Gisele G Zanca
- Department of Physical Therapy, Federal University of São Carlos, Rodovia Washington Luis, km 235, Postal Code: 13565-905, São Carlos, SP, Brazil
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Bardal EM, Roeleveld K, Johansen TO, Mork PJ. Upper limb position control in fibromyalgia. BMC Musculoskelet Disord 2012; 13:186. [PMID: 23006674 PMCID: PMC3518200 DOI: 10.1186/1471-2474-13-186] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/13/2011] [Accepted: 09/20/2012] [Indexed: 01/01/2023] Open
Abstract
BACKGROUND Motor problems are reported by patients with fibromyalgia (FM). However, the mechanisms leading to alterations in motor performance are not well understood. In this study, upper limb position control during sustained isometric contractions was investigated in patients with FM and in healthy controls (HCs). METHODS Fifteen female FM patients and 13 HCs were asked to keep a constant upper limb position during sustained elbow flexion and shoulder abduction, respectively. Subjects received real-time visual feedback on limb position and both tasks were performed unloaded and while supporting loads (1, 2, and 3 kg). Accelerations of the dominant upper limb were recorded, with variance (SD of mean position) and power spectrum analysis used to characterize limb position control. Normalized power of the acceleration signal was extracted for three frequency bands: 1-3 Hz, 4-7 Hz, and 8-12 Hz. RESULTS Variance increased with load in both tasks (P < 0.001) but did not differ significantly between patients and HCs (P > 0.17). Power spectrum analysis showed that the FM patients had a higher proportion of normalized power in the 1-3 Hz band, and a lower proportion of normalized power in the 8-12 Hz band compared to HCs (P < 0.05). The results were consistent for all load conditions and for both elbow flexion and shoulder abduction. CONCLUSION FM patients exhibit an altered neuromuscular strategy for upper limb position control compared to HCs. The predominance of low-frequency limb oscillations among FM patients may indicate a sensory deficit.
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Affiliation(s)
- Ellen Marie Bardal
- Department of Human Movement Science, Norwegian University of Science and Technology, Trondheim, Norway
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Maenhout AG, Palmans T, De Muynck M, De Wilde LF, Cools AM. The impact of rotator cuff tendinopathy on proprioception, measuring force sensation. J Shoulder Elbow Surg 2012; 21:1080-6. [PMID: 22036534 DOI: 10.1016/j.jse.2011.07.006] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/17/2011] [Revised: 06/29/2011] [Accepted: 07/10/2011] [Indexed: 02/01/2023]
Abstract
BACKGROUND The impact of rotator cuff tendinopathy and related impingement on proprioception is not well understood. Numerous quantitative and qualitative changes in shoulder muscles have been shown in patients with rotator cuff tendinopathy. These findings suggest that control of force might be affected. This investigation wants to evaluate force sensation, a submodality of proprioception, in patients with rotator cuff tendinopathy. METHODS Thirty-six patients with rotator cuff tendinopathy and 30 matched healthy subjects performed force reproduction tests to isometric external and internal rotation to investigate how accurately they could reproduce a fixed target (50% MVC). Relative error, constant error, and force steadiness were calculated to evaluate respectively magnitude of error made during the test, direction of this error (overshoot or undershoot), and fluctuations of produced forces. RESULTS Patients significantly overshoot the target (mean, 6.04% of target) while healthy subjects underestimate the target (mean, -5.76% of target). Relative error and force steadiness are similar in patients with rotator cuff tendinopathy and healthy subjects. Force reproduction tests, as executed in this study, were found to be highly reliable (ICC 0.849 and 0.909). Errors were significantly larger during external rotation tests, compared to internal rotation. CONCLUSION Patients overestimate the target during force reproduction tests. This should be taken into account in the rehabilitation of patients with rotator cuff tendinopathy; however, precision of force sensation and steadiness of force exertion remains unaltered. This might indicate that control of muscle force is preserved.
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Affiliation(s)
- Annelies G Maenhout
- Department of Physiotherapy and Rehabilitation Sciences, Ghent University, Ghent, Belgium.
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Variability of three-dimensional forces increase during experimental knee pain. Eur J Appl Physiol 2012; 113:567-75. [DOI: 10.1007/s00421-012-2461-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2012] [Accepted: 07/10/2012] [Indexed: 11/27/2022]
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