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Monaghan AS, Ofori E, Fling BW, Peterson DS. Associating white matter microstructural integrity and improvements in reactive stepping in people with Parkinson's Disease. Brain Imaging Behav 2024:10.1007/s11682-024-00867-w. [PMID: 38530517 DOI: 10.1007/s11682-024-00867-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/15/2024] [Indexed: 03/28/2024]
Abstract
Reactive steps are rapid responses after balance challenges. People with Parkinson's Disease (PwPD) demonstrate impaired reactive stepping, increasing fall-risk. Although PwPD can improve steps through practice, the neural mechanisms contributing to improved reactive stepping are poorly understood. This study investigated white-matter correlates of responsiveness to reactive step training in PwPD. In an eighteen-week multiple-baseline study, participants (n = 22) underwent baseline assessments (B1 and B2 two-weeks apart), a two-week training protocol, and post-training assessments immediately (P1) and two-months (P2) post-training. Assessments involved three backward reactive step trials, measuring anterior-posterior margin of stability (AP MOS), step length, and step latency. Tract-Based Spatial Statistics correlated white-matter integrity (fractional anisotropy (FA) and radial diffusivity (RD)) with retained (P2-B2) and immediate improvements (P1-B2) in stepping. Significant and sustained improvements in step length and AP MOS were observed. Greater retention of step length improvement correlated with increased FA in the left anterior thalamic radiation (ATR), left posterior thalamic radiation (PTR), left superior longitudinal fasciculus (SLF), and right inferior longitudinal fasciculus (ILF). Step latency retention was associated with lower RD in the left posterior corona radiata and left PTR. Immediate improvements in AP MOS correlated with increased FA of the right ILF, right SLF, and right corticospinal tract. Immediate step length improvements were associated with increased FA in right and left ATR and right SLF. These findings highlight the importance of white-matter microstructural integrity in motor learning and retention processes in PD and could aid in identifying individuals with PD who would benefit most from balance rehabilitation.
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Affiliation(s)
- Andrew S Monaghan
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology, Emory University, Atlanta, GA, USA
| | - Edward Ofori
- College of Health Solutions, Arizona State University, Phoenix, AZ, USA
| | - Brett W Fling
- Department of Health and Exercise Science, Colorado State University, Fort Collins, CO, USA
- Molecular, Cellular and Integrative Neurosciences Program, Colorado State University, Fort Collins, USA
| | - Daniel S Peterson
- College of Health Solutions, Arizona State University, Phoenix, AZ, USA.
- Phoenix VA Health Care Center, Phoenix, AZ, USA.
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Monaghan AS, Hooyman A, Dibble LE, Mehta SH, Peterson DS. Generalization of In-Place Balance Perturbation Training in People With Parkinson Disease. J Neurol Phys Ther 2024:01253086-990000000-00061. [PMID: 38489661 DOI: 10.1097/npt.0000000000000471] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/17/2024]
Abstract
BACKGROUND AND PURPOSE Reactive balance training improves reactive postural control in people with Parkinson disease (PwPD). However, the extent to which reactive balance training generalizes to a novel, unpracticed reactive balance task is unknown. This study aimed to determine whether reactive training stepping through support surface translations can be generalized to an unpracticed, instrumented tether-release task. METHODS Twenty-five PwPD (70.52 years ± 7.15; Hoehn and Yahr range 1-3) completed a multiple baseline, open-label, uncontrolled pre-post intervention study. Stepping was trained through a 2-week (6-session) intervention with repeated support surface translations. Performance on an untrained tether-release task (generalization task) was measured at 2 baseline assessments (B1 and B2, 2 weeks apart), immediately after the intervention (P1), and 2 months after training (P2). The tether-release task outcomes were the anterior-posterior margin of stability (MOS), step length, and step latency during backward and forward steps. RESULTS After support surface translation practice, tether-release stepping performance improved in MOS, step length, and step latency for both backward and forward steps compared to baseline (P < 0.05). Improvements in MOS and step length during backward and forward steps in the tether-release task, respectively, were related to stepping changes in the practiced task. However, the improvements in the generalization task were not retained for 2 months. DISCUSSION AND CONCLUSIONS These findings support short-term generalization from trained balance tasks to novel, untrained tasks. These findings contribute to our understanding of the effects and generalization of reactive step training in PwPD. Video Abstract available for more insights from the authors (see the Video, Supplemental Digital Content available at http://links.lww.com/JNPT/A465).
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Affiliation(s)
- Andrew S Monaghan
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology, Emory University, Atlanta, Georgia (A.S.M.); School of Biological and Health Systems Engineering, Arizona State University, Tempe, Arizona (A.H.); Department of Physical Therapy and Athletic Training, University of Utah, Salt Lake City, Utah (L.E.D.); Department of Neurology, Mayo Clinic, Scottsdale, Arizona (S.H.M.); College of Health Solutions, Arizona State University, Tempe, Arizona (D.S.P.); and Phoenix VA Health Care Center, Phoenix, Arizona (D.S.P.)
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Seuthe J, Heinzel A, Hulzinga F, Ginis P, Zeuner KE, Deuschl G, D’Cruz N, Nieuwboer A, Schlenstedt C. Towards a better understanding of anticipatory postural adjustments in people with Parkinson's disease. PLoS One 2024; 19:e0300465. [PMID: 38466709 PMCID: PMC10927092 DOI: 10.1371/journal.pone.0300465] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Accepted: 02/12/2024] [Indexed: 03/13/2024] Open
Abstract
INTRODUCTION Previous studies have shown that anticipatory postural adjustments (APAs) are altered in people with Parkinson's disease but its meaning for locomotion is less understood. This study aims to investigate the association between APAs and gait initiation, gait and freezing of gait and how a dynamic postural control challenging training may induce changes in these features. METHODS Gait initiation was quantified using wearable sensors and subsequent straight walking was assessed via marker-based motion capture. Additionally, turning and FOG-related outcomes were measured with wearable sensors. Assessments were conducted one week before (Pre), one week after (Post) and 4 weeks after (Follow-up) completion of a training intervention (split-belt treadmill training or regular treadmill training), under single task and dual task (DT) conditions. Statistical analysis included a linear mixed model for training effects and correlation analysis between APAs and the other outcomes for Pre and Post-Pre delta. RESULTS 52 participants with Parkinson's disease (22 freezers) were assessed. We found that APA size in the medio-lateral direction during DT was positively associated with gait speed (p<0.001) and stride length (p<0.001) under DT conditions at Pre. The training effect was largest for first step range of motion and was similar for both training modes. For the associations between changes after the training (pooled sample) medio-lateral APA size showed a significant positive correlation with first step range of motion (p = 0.033) only in the DT condition and for the non-freezers only. CONCLUSIONS The findings of this work revealed new insights into how APAs were not associated with first step characteristics and freezing and only baseline APAs during DT were related with DT gait characteristics. Training-induced changes in the size of APAs were related to training benefits in the first step ROM only in non-freezers. Based on the presented results increasing APA size through interventions might not be the ideal target for overall improvement of locomotion.
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Affiliation(s)
- Jana Seuthe
- Institute of Interdisciplinary Exercise Science and Sports Medicine, MSH Medical School Hamburg, Hamburg, Germany
- Department of Neurology, University Hospital Schleswig-Holstein, Kiel, Germany
| | - Anna Heinzel
- Department of Neurology, University Hospital Schleswig-Holstein, Kiel, Germany
| | - Femke Hulzinga
- Department of Rehabilitation Sciences, KU Leuven, Leuven, Belgium
| | - Pieter Ginis
- Department of Rehabilitation Sciences, KU Leuven, Leuven, Belgium
| | - Kirsten E. Zeuner
- Department of Neurology, University Hospital Schleswig-Holstein, Kiel, Germany
| | - Günther Deuschl
- Department of Neurology, University Hospital Schleswig-Holstein, Kiel, Germany
| | - Nicholas D’Cruz
- Department of Rehabilitation Sciences, KU Leuven, Leuven, Belgium
| | - Alice Nieuwboer
- Department of Rehabilitation Sciences, KU Leuven, Leuven, Belgium
| | - Christian Schlenstedt
- Institute of Interdisciplinary Exercise Science and Sports Medicine, MSH Medical School Hamburg, Hamburg, Germany
- Department of Neurology, University Hospital Schleswig-Holstein, Kiel, Germany
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Monaghan AS, Hooyman A, Dibble LE, Mehta SH, Peterson DS. Stability Changes in Fall-Prone Individuals With Parkinson Disease Following Reactive Step Training. J Neurol Phys Ther 2024; 48:46-53. [PMID: 37259190 DOI: 10.1097/npt.0000000000000442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
BACKGROUND AND PURPOSE Poor reactive steps may lead to falls in people with Parkinson disease (PwPD). However, whether reactive steps can be improved in PwPD at risk for falls or whether step training reduces falls remains unclear. This study aimed to determine whether 2 weeks of reactive step training result in (1) immediate and retained improvements in stepping and (2) fewer prospective falls in PwPD at fall risk. METHODS Twenty-five PwPD (70.52 years ± 7.15; Hoehn & Yahr range 1-3) at risk for falls completed a multiple baseline, open-label, uncontrolled pre-/postintervention study. Stepping performance was assessed at 2 baseline assessments (B1 and B2) followed by a 2-week, 6-session training protocol. Stepping was assessed immediately (P1) and 2 months after training (P2). Primary outcomes were anterior-posterior margin of stability (MOS), step length, and step latency during backward stepping. Fall frequency was measured for 2 months before and after training. RESULTS MOS during backward steps was significantly larger (better) after training ( P < 0.001, d = 0.83), and improvements were retained for 2 months ( P = 0.04, d = 0.66). Step length was not statistically significant different after training ( P = 0.13, d = 0.46) or at follow-up ( P = 0.08, d = 0.62), although effect sizes were medium and large, respectively. Step latency improved after initial exposure ( P = 0.01, d = 0.60) but not following training ( P = 0.43, d = 0.35). Twelve participants experienced fewer falls after training than before (10 = no change, 5 = increase; P = 0.12). Greater improvements in MOS were related to fewer falls ( P = 0.04). DISCUSSION AND CONCLUSIONS Two weeks of reactive step training resulted in immediate and retained improvements in some reactive stepping outcomes in PwPD at risk for falls and may reduce fall risk. Reactive step training may be a viable approach to reduce falls in PwPD.
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Affiliation(s)
- Andrew S Monaghan
- College of Health Solutions, Arizona State University, Phoenix (A.S.M., D.S.P.); School of Biological and Health Systems Engineering, Arizona State University, Tempe (A.H.); Department of Physical Therapy and Athletic Training, University of Utah, Salt Lake City (L.E.D.); Mayo Clinic, Scottsdale, Arizona (S.H.M.); and Phoenix VA Health Care Center, Phoenix, Arizona (D.S.P.)
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Heß T, Themann P, Oehlwein C, Milani TL. Does Impaired Plantar Cutaneous Vibration Perception Contribute to Axial Motor Symptoms in Parkinson's Disease? Effects of Medication and Subthalamic Nucleus Deep Brain Stimulation. Brain Sci 2023; 13:1681. [PMID: 38137129 PMCID: PMC10742284 DOI: 10.3390/brainsci13121681] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Revised: 11/28/2023] [Accepted: 12/03/2023] [Indexed: 12/24/2023] Open
Abstract
OBJECTIVE To investigate whether impaired plantar cutaneous vibration perception contributes to axial motor symptoms in Parkinson's disease (PD) and whether anti-parkinsonian medication and subthalamic nucleus deep brain stimulation (STN-DBS) show different effects. METHODS Three groups were evaluated: PD patients in the medication "on" state (PD-MED), PD patients in the medication "on" state and additionally "on" STN-DBS (PD-MED-DBS), as well as healthy subjects (HS) as reference. Motor performance was analyzed using a pressure distribution platform. Plantar cutaneous vibration perception thresholds (VPT) were investigated using a customized vibration exciter at 30 Hz. RESULTS Motor performance of PD-MED and PD-MED-DBS was characterized by greater postural sway, smaller limits of stability ranges, and slower gait due to shorter strides, fewer steps per minute, and broader stride widths compared to HS. Comparing patient groups, PD-MED-DBS showed better overall motor performance than PD-MED, particularly for the functional limits of stability and gait. VPTs were significantly higher for PD-MED compared to those of HS, which suggests impaired plantar cutaneous vibration perception in PD. However, PD-MED-DBS showed less impaired cutaneous vibration perception than PD-MED. CONCLUSIONS PD patients suffer from poor motor performance compared to healthy subjects. Anti-parkinsonian medication in tandem with STN-DBS seems to be superior for normalizing axial motor symptoms compared to medication alone. Plantar cutaneous vibration perception is impaired in PD patients, whereas anti-parkinsonian medication together with STN-DBS is superior for normalizing tactile cutaneous perception compared to medication alone. Consequently, based on our results and the findings of the literature, impaired plantar cutaneous vibration perception might contribute to axial motor symptoms in PD.
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Affiliation(s)
- Tobias Heß
- Department of Human Locomotion, Chemnitz University of Technology, 09126 Chemnitz, Germany
| | - Peter Themann
- Department of Neurology and Parkinson, Clinic at Tharandter Forest, 09633 Halsbruecke, Germany
| | - Christian Oehlwein
- Neurological Outpatient Clinic for Parkinson Disease and Deep Brain Stimulation, 07551 Gera, Germany
| | - Thomas L. Milani
- Department of Human Locomotion, Chemnitz University of Technology, 09126 Chemnitz, Germany
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Duysens J, Smits-Engelsman B. Freezing as Seen from the Inside. Mov Disord 2023; 38:1598-1601. [PMID: 37166110 DOI: 10.1002/mds.29444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Revised: 03/28/2023] [Accepted: 04/28/2023] [Indexed: 05/12/2023] Open
Affiliation(s)
- Jacques Duysens
- Department of Movement Sciences, Motor Control Laboratory, Movement Control and Neuroplasticity Research Group KU Leuven, Leuven, Belgium
| | - Bouwien Smits-Engelsman
- Department of Health and Rehabilitation Sciences, Faculty of Health Sciences, Division of Physiotherapy, Cape Town University, Cape Town, South Africa
- Department of Physical Activity, Sport and Recreation, Faculty Health Sciences, North-West University, Potchefstroom, South Africa
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Heß T, Oehlwein C, Milani TL. Anticipatory Postural Adjustments and Compensatory Postural Responses to Multidirectional Perturbations-Effects of Medication and Subthalamic Nucleus Deep Brain Stimulation in Parkinson's Disease. Brain Sci 2023; 13:brainsci13030454. [PMID: 36979264 PMCID: PMC10046463 DOI: 10.3390/brainsci13030454] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Revised: 03/01/2023] [Accepted: 03/03/2023] [Indexed: 03/30/2023] Open
Abstract
BACKGROUND Postural instability is one of the most restricting motor symptoms for patients with Parkinson's disease (PD). While medication therapy only shows minor effects, it is still unclear whether medication in conjunction with deep brain stimulation (DBS) of the subthalamic nucleus (STN) improves postural stability. Hence, the aim of this study was to investigate whether PD patients treated with medication in conjunction with STN-DBS have superior postural control compared to patients treated with medication alone. METHODS Three study groups were tested: PD patients on medication (PD-MED), PD patients on medication and on STN-DBS (PD-MED-DBS), and healthy elderly subjects (HS) as a reference. Postural performance, including anticipatory postural adjustments (APA) prior to perturbation onset and compensatory postural responses (CPR) following multidirectional horizontal perturbations, was analyzed using force plate and electromyography data. RESULTS Regardless of the treatment condition, both patient groups showed inadequate APA and CPR with early and pronounced antagonistic muscle co-contractions compared to healthy elderly subjects. Comparing the treatment conditions, study group PD-MED-DBS only showed minor advantages over group PD-MED. In particular, group PD-MED-DBS showed faster postural reflexes and tended to have more physiological co-contraction ratios. CONCLUSION medication in conjunction with STN-DBS may have positive effects on the timing and amplitude of postural control.
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Affiliation(s)
- Tobias Heß
- Department of Human Locomotion, Chemnitz University of Technology, 09126 Chemnitz, Germany
| | - Christian Oehlwein
- Neurological Outpatient Clinic for Parkinson Disease and Deep Brain Stimulation, 07551 Gera, Germany
| | - Thomas L Milani
- Department of Human Locomotion, Chemnitz University of Technology, 09126 Chemnitz, Germany
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Leroy T, Baggen RJ, Lefeber N, Herssens N, Santens P, De Letter M, Maes L, Bouche K, Van Bladel A. Effects of Oral Levodopa on Balance in People with Idiopathic Parkinson's Disease. J Parkinsons Dis 2023; 13:3-23. [PMID: 36617752 PMCID: PMC9912739 DOI: 10.3233/jpd-223536] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
BACKGROUND Balance impairment is a frequent cause of morbidity and mortality in people with Parkinson's disease (PD). As opposed to the effects of appendicular motor symptoms, the effects of Levodopa on balance impairment in idiopathic PD are less clear. OBJECTIVE To review the literature on the effects of oral Levodopa on clinical balance test performance, posturography, step initiation, and responses to perturbation in people with idiopathic PD (PwPD). METHODS A systematic search of three scientific databases (Pubmed, Embase, and Web of Science) was conducted in accordance with PRISMA guidelines. For the pilot meta-analysis, standardized mean differences with 95% confidence intervals were calculated using an inverse variance random effects model. Data not suitable for implementation in the meta-analysis (missing means or standard deviations, and non-independent outcomes) were analyzed narratively. RESULTS A total of 2772 unique studies were retrieved, of which 18 met the eligibility criteria and were analyzed, including data of 710 idiopathic PwPD. Levodopa had a significant positive effect on the Berg Balance Scale, the Push and Release test, and jerk and frequency parameters during posturography. In contrast, some significant negative effects on velocity-based sway parameters were found during posturography and step initiation. However, Levodopa had no significant effect on most step initiation- and all perturbation parameters. CONCLUSION The effects of Levodopa on balance in PwPD vary depending on the outcome parameters and patient inclusion criteria. A systematic approach with well-defined outcome parameters, and prespecified, sensitive and reliable tests is needed in future studies to unravel the effects of oral Levodopa on balance.
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Affiliation(s)
- Tim Leroy
- Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium
| | - Remco J. Baggen
- Department of Rehabilitation Sciences, Ghent University, Ghent, Belgium,Correspondence to: Dr. Remco Baggen, Department of Rehabilitation Sciences, Ghent University, Campus UZ Gent, Corneel Heymanslaan 10, 9000 Gent, Belgium. E-mail:
| | - Nina Lefeber
- Rehabilitation Research Group, Department of Physiotherapy, Human Physiology and Anatomy, Vrije Universiteit Brussel, Brussels, Belgium
| | - Nolan Herssens
- Department of Rehabilitation Sciences, Ghent University, Ghent, Belgium,Space Medicine Team, European Astronaut Centre, European Space Agency, Cologne, Germany
| | - Patrick Santens
- Department of Neurology, Ghent University Hospital, Ghent, Belgium,Research Group BrainComm, Ghent University, Ghent, Belgium
| | - Miet De Letter
- Department of Rehabilitation Sciences, Ghent University, Ghent, Belgium,Research Group BrainComm, Ghent University, Ghent, Belgium
| | - Leen Maes
- Department of Rehabilitation Sciences, Ghent University, Ghent, Belgium,Department of Otorhinolaryngology, Ghent University Hospital, Ghent, Belgium
| | - Katie Bouche
- Department of Rehabilitation Sciences, Ghent University, Ghent, Belgium,Department of Physical and Rehabilitation Medicine, Ghent University Hospital, Ghent, Belgium
| | - Anke Van Bladel
- Department of Rehabilitation Sciences, Ghent University, Ghent, Belgium,Department of Physical and Rehabilitation Medicine, Ghent University Hospital, Ghent, Belgium
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Palmisano C, Beccaria L, Haufe S, Volkmann J, Pezzoli G, Isaias IU. Gait Initiation Impairment in Patients with Parkinson's Disease and Freezing of Gait. Bioengineering (Basel) 2022; 9:639. [PMID: 36354550 PMCID: PMC9687939 DOI: 10.3390/bioengineering9110639] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Revised: 10/14/2022] [Accepted: 10/15/2022] [Indexed: 08/03/2023] Open
Abstract
Freezing of gait (FOG) is a sudden episodic inability to produce effective stepping despite the intention to walk. It typically occurs during gait initiation (GI) or modulation and may lead to falls. We studied the anticipatory postural adjustments (imbalance, unloading, and stepping phase) at GI in 23 patients with Parkinson's disease (PD) and FOG (PDF), 20 patients with PD and no previous history of FOG (PDNF), and 23 healthy controls (HCs). Patients performed the task when off dopaminergic medications. The center of pressure (CoP) displacement and velocity during imbalance showed significant impairment in both PDNF and PDF, more prominent in the latter patients. Several measurements were specifically impaired in PDF patients, especially the CoP displacement along the anteroposterior axis during unloading. The pattern of segmental center of mass (SCoM) movements did not show differences between groups. The standing postural profile preceding GI did not correlate with outcome measurements. We have shown impaired motor programming at GI in Parkinsonian patients. The more prominent deterioration of unloading in PDF patients might suggest impaired processing and integration of somatosensory information subserving GI. The unaltered temporal movement sequencing of SCoM might indicate some compensatory cerebellar mechanisms triggering time-locked models of body mechanics in PD.
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Affiliation(s)
- Chiara Palmisano
- Department of Neurology, University Hospital and Julius-Maximilian-University, 97080 Würzburg, Germany
| | - Laura Beccaria
- Department of Neurology, University Hospital and Julius-Maximilian-University, 97080 Würzburg, Germany
| | - Stefan Haufe
- Uncertainty, Inverse Modeling and Machine Learning Group, Faculty IV Electrical Engineering and Computer Science, Technical University of Berlin, 10623 Berlin, Germany
| | - Jens Volkmann
- Department of Neurology, University Hospital and Julius-Maximilian-University, 97080 Würzburg, Germany
| | - Gianni Pezzoli
- Centro Parkinson, ASST Gaetano Pini-CTO, 20122 Milano, Italy
| | - Ioannis U. Isaias
- Department of Neurology, University Hospital and Julius-Maximilian-University, 97080 Würzburg, Germany
- Centro Parkinson, ASST Gaetano Pini-CTO, 20122 Milano, Italy
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Ragothaman A, Mancini M, Nutt JG, Fair DA, Miranda-Dominguez O, Horak FB. Resting state functional networks predict different aspects of postural control in Parkinson's disease. Gait Posture 2022; 97:122-129. [PMID: 35931013 DOI: 10.1016/j.gaitpost.2022.07.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Revised: 06/17/2022] [Accepted: 07/05/2022] [Indexed: 02/02/2023]
Abstract
BACKGROUND Parkinson's disease (PD) is a neurodegenerative disorder causing postural control impairments. Postural control involves multiple domains, such as control of postural sway in stance, automatic postural responses (APRs) and anticipatory postural adjustments (APAs). We hypothesize that impairments in each postural domain is associated with resting-state functional connectivity (rsFC), accounted by predictive modeling and that cortical and cerebellar networks would predict postural control in people with PD (PwPD). OBJECTIVE To determine whether rsFC can predict three domains of postural control independently in PwPD and older adults (OA) based on predictive accuracy of models. METHODS The cohort consisted of 65 PwPD (67.7 +8.1 age) tested in their OFF-state and 42 OA (69.7 +8.2 age). Six body-worn, inertial sensors measured postural sway area while standing on foam, step length of APRs to a backward push-and-release perturbation, and magnitude of lateral APAs prior to voluntary gait initiation. Resting state-fMRI data was reported on 384 regions of interest that were grouped into 13 functional brain networks. Associations between rsFC and postural metrics were characterized using predictive modeling, with an independent training (n = 67) and validation (n = 40) dataset. Models were trained in the training sample and performance of the best model was validated in the independent test dataset. RESULTS rsFC of different brain networks predicted each domain of postural control in PD: Frontoparietal and Ventral Attention rsFC for APAs; Cerebellar-Subcortical and Visual rsFC and Auditory and Cerebellar-Subcortical rsFC for APRs; Ventral Attention and Ventral Multimodal rsFC for postural sway. In OA, CinguloOpercular and Somatomotor rsFC predicted APAs. CONCLUSIONS Our findings suggest that cortical networks predict postural control in PD and there is little overlap in brain network connectivities that predict different domains of postural control, given the rsFC methodology used. PwPD use different cortical networks for APAs compared to OA.
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Affiliation(s)
| | - Martina Mancini
- Department of Biomedical Engineering, Oregon Health and Science University, Portland, OR 97239, USA; Department of Neurology, Oregon Health and Science University, Portland, OR 97239, USA
| | - John G Nutt
- Department of Neurology, Oregon Health and Science University, Portland, OR 97239, USA
| | - Damien A Fair
- Masonic Institute for the Developing Brain (MIDB), University of Minnesota, Minneapolis, MN 55455, USA; Institute of Child Development, College of Education and Human Development, University of Minnesota, Minneapolis, MN 55455, USA; Department of Pediatrics, University of Minnesota Medical School, University of Minnesota, Minneapolis, MN 55455, USA; Department of Behavioral Neuroscience, Oregon Health and Science University, Portland, OR 97239, USA
| | - Oscar Miranda-Dominguez
- Masonic Institute for the Developing Brain (MIDB), University of Minnesota, Minneapolis, MN 55455, USA; Department of Pediatrics, University of Minnesota Medical School, University of Minnesota, Minneapolis, MN 55455, USA
| | - Fay B Horak
- Department of Biomedical Engineering, Oregon Health and Science University, Portland, OR 97239, USA; Department of Neurology, Oregon Health and Science University, Portland, OR 97239, USA.
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Wang Y, Watanabe K, Asaka T. Anticipatory and Compensatory Postural Adjustments in Response to Dynamic Platform Perturbation during a Forward Step. J Mot Behav 2022; 55:31-38. [PMID: 35876130 DOI: 10.1080/00222895.2022.2092440] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
We investigated the generation of anticipatory (APAs) and compensatory postural adjustments (CPAs) in preparation for a step during support surface perturbation. Changes in anticipatory muscle activation in the trunk segment were predominantly in the co-contraction indices from -600 t0 -400 ms to foot-off. Reciprocal indices of the shank muscles were pronounced in the APA intervals. During the CPA intervals, larger reciprocal muscle activities were detected compared to the APA intervals. The results showed subjects co-varied the reciprocal and co-contraction activations in postural muscles to counteract the perturbation and generate mechanical effects sufficient for stepping during the APA and CPA intervals. This study enhances our understanding of the interaction between the APAs and CPAs in balance maintenance.
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Affiliation(s)
- Yun Wang
- Tianjin Key Lab of Exercise Physiology and Sports Medicine, College of Social Sport and Health Science, Tianjin University of Sport, Tianjin, China
| | | | - Tadayoshi Asaka
- Department of Rehabilitation Science, Faculty of Health Sciences, Hokkaido University, Sapporo, Japan
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Daly S, Hanson JT, Mavanji V, Gravely A, Jean J, Jonason A, Lewis S, Ashe J, Looft JM, McGovern RA. Using kinematics to re-define the pull test as a quantitative biomarker of the postural response in normal pressure hydrocephalus patients. Exp Brain Res 2022; 240:791-802. [PMID: 35041069 DOI: 10.1007/s00221-021-06292-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2021] [Accepted: 12/14/2021] [Indexed: 11/30/2022]
Abstract
Quantitative biomarkers are needed for the diagnosis, monitoring and therapeutic assessment of postural instability in movement disorder patients. The goal of this study was to create a practical, objective measure of postural instability using kinematic measurements of the pull test. Twenty-one patients with normal pressure hydrocephalus and 20 age-matched control subjects were fitted with inertial measurement units and underwent 10-20 pull tests of varying intensities performed by a trained clinician. Kinematic data were extracted for each pull test and aggregated. Patients participated in 103 sessions for a total of 1555 trials while controls participated in 20 sessions for a total of 299 trials. Patients were separated into groups by MDS-Unified Parkinson's Disease Rating Scale (MDS-UPDRS) pull test score. The center of mass velocity profile easily distinguished between patient groups such that score increases correlated with decreases in peak velocity and later peak velocity onset. All patients except those scored as "3" demonstrated an increase in step length and decrease in reaction time with increasing pull intensity. Groups were distinguished by differences in the relationship of step length to pull intensity (slope) and their overall step length or reaction time regardless of pull intensity (y-intercept). NPH patients scored as "normal" on the MDS-UPDRS scale were kinematically indistinguishable from age-matched control subjects during a standardized perturbation, but could be distinguished from controls by their response to a range of pull intensities. An instrumented, purposefully varied pull test produces kinematic metrics useful for distinguishing clinically meaningful differences within hydrocephalus patients as well as distinguishing these patients from healthy, control subjects.
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Affiliation(s)
- Samuel Daly
- Department of Neurosurgery, University of Minnesota Medical School, University of Minnesota, 420 Delaware St. SE, MMC 96, Room D-429, Minneapolis, MN, 55455, USA
| | - Jacob T Hanson
- Department of Neurosurgery, University of Minnesota Medical School, University of Minnesota, 420 Delaware St. SE, MMC 96, Room D-429, Minneapolis, MN, 55455, USA
| | - Vibha Mavanji
- Division of Prosthetics, Motion Capture Analysis Laboratory, Minneapolis Veterans Affairs Health Care System, Minneapolis, MN, USA
| | - Amy Gravely
- Department of Statistics, Minneapolis Veterans Affairs Health Care System, Minneapolis, MN, USA
| | - James Jean
- Department of Neurosurgery, University of Minnesota Medical School, University of Minnesota, 420 Delaware St. SE, MMC 96, Room D-429, Minneapolis, MN, 55455, USA
| | - Alec Jonason
- Department of Neurosurgery, University of Minnesota Medical School, University of Minnesota, 420 Delaware St. SE, MMC 96, Room D-429, Minneapolis, MN, 55455, USA
| | - Scott Lewis
- Department of Neurology, University of Minnesota Medical School, Minneapolis, MN, USA.,Department of Neurology, Minneapolis Veterans Affairs Health Care System, Minneapolis, MN, USA
| | - James Ashe
- Department of Neurology, University of Minnesota Medical School, Minneapolis, MN, USA.,Department of Neurology, Minneapolis Veterans Affairs Health Care System, Minneapolis, MN, USA
| | - John M Looft
- Division of Prosthetics, Motion Capture Analysis Laboratory, Minneapolis Veterans Affairs Health Care System, Minneapolis, MN, USA
| | - Robert A McGovern
- Department of Neurosurgery, University of Minnesota Medical School, University of Minnesota, 420 Delaware St. SE, MMC 96, Room D-429, Minneapolis, MN, 55455, USA. .,Division of Neurosurgery, Minneapolis Veterans Affairs Health Care System, Minneapolis, MN, USA.
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Bohnen NI, Costa RM, Dauer WT, Factor SA, Giladi N, Hallett M, Lewis SJ, Nieuwboer A, Nutt JG, Takakusaki K, Kang UJ, Przedborski S, Papa SM. Discussion of Research Priorities for Gait Disorders in Parkinson's Disease. Mov Disord 2021; 37:253-263. [PMID: 34939221 PMCID: PMC10122497 DOI: 10.1002/mds.28883] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Revised: 10/08/2021] [Accepted: 11/10/2021] [Indexed: 12/18/2022] Open
Abstract
Gait and balance abnormalities develop commonly in Parkinson's disease and are among the motor symptoms most disabling and refractory to dopaminergic or other treatments, including deep brain stimulation. Efforts to develop effective therapies are challenged by limited understanding of these complex disorders. There is a major need for novel and appropriately targeted research to expedite progress in this area. The Scientific Issues Committee of the International Parkinson and Movement Disorder Society has charged a panel of experts in the field to consider the current knowledge gaps and determine the research routes with highest potential to generate groundbreaking data. © 2021 International Parkinson and Movement Disorder Society.
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Affiliation(s)
- Nicolaas I. Bohnen
- Departments of Radiology and Neurology University of Michigan and VA Ann Arbor Healthcare System Ann Arbor Michigan USA
| | - Rui M. Costa
- Departments of Neuroscience and Neurology, Zuckerman Mind Brain Behavior Institute Columbia University New York New York USA
| | - William T. Dauer
- Departments of Neurology and Neuroscience The Peter O'Donnell Jr. Brain Institute, UT Southwestern Dallas Texas USA
| | - Stewart A. Factor
- Jean and Paul Amos Parkinson's Disease and Movement Disorders Program Emory University School of Medicine Atlanta Georgia USA
| | - Nir Giladi
- Movement Disorders Unit, Department of Neurology, Tel‐Aviv Sourasky Medical Center, Sackler School of Medicine and Sagol School of Neuroscience Tel Aviv University Tel Aviv Israel
| | - Mark Hallett
- Human Motor Control Section National Institute of Neurological Disorders and Stroke, National Institutes of Health Bethesda Maryland USA
| | - Simon J.G. Lewis
- ForeFront Parkinson's Disease Research Clinic, Brain and Mind Centre, School of Medical Sciences University of Sydney Sydney New South Wales Australia
| | - Alice Nieuwboer
- Department of Rehabilitation Sciences KU Leuven Leuven Belgium
| | - John G. Nutt
- Movement Disorder Section, Department of Neurology Oregon Health & Science University Portland Oregon USA
| | - Kaoru Takakusaki
- Department of Physiology, Section of Neuroscience Asahikawa Medical University Asahikawa Japan
| | - Un Jung Kang
- Departments of Neurology, Neuroscience, and Physiology Neuroscience Institute, The Marlene and Paolo Fresco Institute for Parkinson's and Movement Disorders, The Parekh Center for Interdisciplinary Neurology, New York University Grossman School of Medicine New York New York USA
| | - Serge Przedborski
- Departments of Pathology and Cell Biology, Neurology, and Neuroscience Columbia University New York New York USA
| | - Stella M. Papa
- Department of Neurology, School of Medicine, and Yerkes National Primate Research Center Emory University Atlanta Georgia USA
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Russo Y, Marinkovic D, Obradovic B, Vannozzi G. Characterization of Anticipatory Postural Adjustments in Lateral Stepping: Impact of Footwear and Lower Limb Preference. Sensors (Basel) 2021; 21:8244. [PMID: 34960335 DOI: 10.3390/s21248244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Revised: 11/26/2021] [Accepted: 12/07/2021] [Indexed: 11/17/2022]
Abstract
Lateral stepping is a motor task that is widely used in everyday life to modify the base of support, change direction, and avoid obstacles. Anticipatory Postural Adjustments (APAs) are often analyzed to describe postural preparation prior to forward stepping, however, little is known about lateral stepping. The aim of the study is to characterize APAs preceding lateral steps and to investigate how these are affected by footwear and lower limb preference. Twenty-two healthy young participants performed a lateral step using both their preferred and non-preferred leg in both barefoot and shod conditions. APA spatiotemporal parameters (size, duration, and speed) along both the anteroposterior and mediolateral axes were obtained through force plate data. APAs preceding lateral stepping showed typical patterns both along the anteroposterior and mediolateral axis. RM-ANOVA highlighted a significant effect of footwear only on medio-lateral APAs amplitude (p = 0.008) and velocity (p = 0.037). No differences were found for the limb preference. APAs in lateral stepping presented consistent features in the sagittal component, regardless of limb/shoe factors. Interestingly, the study observed that footwear induced an increase in the medio-lateral APAs size and velocity, highlighting the importance of including this factor when studying lateral stepping.
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15
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Monaghan AS, Finley JM, Mehta SH, Peterson DS. Assessing the impact of dual-task reactive step practice in people with Parkinson's disease: A feasibility study. Hum Mov Sci 2021; 80:102876. [PMID: 34534945 DOI: 10.1016/j.humov.2021.102876] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Revised: 09/07/2021] [Accepted: 09/08/2021] [Indexed: 11/16/2022]
Abstract
Reactive stepping is impaired in people with Parkinson's Disease (PD) but can be improved with training. However, it is unclear if reactive steps can be improved when performing a concurrent cognitive task, a common and fall-relevant circumstance. We assessed the feasibility and preliminary effectiveness of dual-task reactive step training. Specifically, we measured whether stepping and cognitive reaction time are improved after one day of dual-task reactive step practice and if improvements are retained 24 h later. Sixteen people with PD and 13 age-matched healthy controls (HC) underwent repeated from-stance support surface perturbations that elicited a reactive step while performing an auditory Stroop task. Participants returned the following day to reassess dual-task reactive stepping performance. Cognitive, neuromuscular, and stepping outcomes were calculated. Increased step lengths were observed for both groups after practice (p < 0.001). Cognitive reaction times also improved through practice; however, this was more pronounced in the HC group (group by time interaction- p < 0.001). No changes were observed for step latency, margin of stability, or EMG onset through practice. Step length and cognitive reaction time improvements were retained 24 h after practice in both groups (step length: p < 0.001; cognitive reaction time: p = 0.05). This study provides preliminary evidence for the effectiveness of dual-task reactive step training to improve step length in people with PD. The improvements in step length without compromising cognitive reaction times suggest that participants improved reactive stepping without a robust attention shift toward the postural task. Future research is necessary to determine optimal training protocols and determine if such training protocols impact falls in PD patients.
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Affiliation(s)
- Andrew S Monaghan
- College of Health Solutions, Arizona State University, Phoenix, AZ, USA
| | - James M Finley
- Division of Biokinesiology and Physical Therapy, University of Southern California, Los Angeles, CA, USA
| | | | - Daniel S Peterson
- College of Health Solutions, Arizona State University, Phoenix, AZ, USA; Phoenix VA Health Care Center, Phoenix, AZ, USA.
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Yamada H, Shinya M. Variability in the Center of Mass State During Initiation of Accurate Forward Step Aimed at Targets of Different Sizes. Front Sports Act Living 2021; 3:691307. [PMID: 34490423 PMCID: PMC8416920 DOI: 10.3389/fspor.2021.691307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Accepted: 07/21/2021] [Indexed: 11/13/2022] Open
Abstract
Motor control for forward step initiation begins with anticipatory postural adjustments (APAs). During APAs, the central nervous system controls the center of pressure (CoP) to generate an appropriate center of mass (CoM) position and velocity for various task requirements. In this study, we investigated the effect of required stepping accuracy on the CoM and CoP parameters during APA for a step initiation task. Sixteen healthy young participants stepped forward onto the targets on the ground as soon as and as fast as possible in response to visual stimuli. Two target sizes (small: 2 cm square and large: 10 cm square) and two target distances (short: 20% and long: 40% of the body height) were tested. CoP displacement during the APA and the CoM position, velocity, and extrapolated CoM at the timing of the takeoff of the lead leg were compared among the conditions. In the small condition, comparing with the large condition, the CoM position was set closer to the stance limb side during the APA, which was confirmed by the location of the extrapolated center of mass at the instance of the takeoff of the lead leg [small: 0.09 ± 0.01 m, large: 0.06 ± 0.01 m, mean and standard deviation, F (1, 15) = 96.46, p < 0.001, η2 = 0.87]. The variability in the mediolateral extrapolated center of mass location was smaller in the small target condition than large target condition when the target distance was long [small: 0.010 ± 0.002 m, large: 0.013 ± 0.004 m, t(15) = 3.8, p = 0.002, d = 0.96]. These findings showed that in the step initiation task, the CoM state and its variability were task-relevantly determined during the APA in accordance with the required stepping accuracy.
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Affiliation(s)
- Hiroki Yamada
- Graduate School of Humanities and Social Sciences, Hiroshima University, Hiroshima, Japan
| | - Masahiro Shinya
- Graduate School of Humanities and Social Sciences, Hiroshima University, Hiroshima, Japan
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17
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Luis-Martínez R, Di Marco R, Weis L, Cianci V, Pistonesi F, Baba A, Carecchio M, Biundo R, Tedesco C, Masiero S, Antonini A. Impact of social and mobility restrictions in Parkinson's disease during COVID-19 lockdown. BMC Neurol 2021; 21:332. [PMID: 34461838 PMCID: PMC8404403 DOI: 10.1186/s12883-021-02364-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2020] [Accepted: 08/18/2021] [Indexed: 01/11/2023] Open
Abstract
BACKGROUND The consequences of strict COVID-19 mobility restrictions on motor/non-motor features in Parkinson's disease (PD) have not been systematically studied but worse mobility and quality of life have been reported. To elucidate this question, 12 mild to moderate PD patients were assessed in March 2020 before and after two months of isolation as part of a clinical study that had to be interrupted due to the pandemic and the implementation of COVID19 mobility restrictions. METHODS Twelve patients were systematically evaluated before and after the lockdown period as part of a larger cohort that previously underwent thermal water rehabilitation. Clinical outcomes were the Body Mass index, the Mini-Balance Evaluation Systems Test, the MDS-Unified Parkinson's Disease Rating Scale part III, the 6 Minute Walking Test and the New Freezing of Gait Questionnaire. Global cognition was evaluated with the Montreal Cognitive Assessment scale. The impact of COVID-19 restrictions on quality of life and functional independence was evaluated with The Parkinson's disease Quality of life (PDQ-39), the Activities of Daily Living (ADL) and Instrumental Activities of Daily Living questionnaires (IADL) and the Parkinson's disease cognitive functional rating scales (PD-CFRS). RESULTS After two months of isolation the Mini-BESTest score worsened (p=0.005), and four patients reported one or more falls during the lockdown. BMI increased (p=0.031) while the remaining clinical variables including quality of life did not change. CONCLUSION We observed moderate worsening at Mini-BESTest, greater risk of falls and increased body weight as consequence of prolonged immobility. We believe negative effects were partially softened since patients were in contact with our multidisciplinary team during the lockdown and had previously received training to respond to the needs of this emergency isolation. These findings highligh the importnace of patient-centered interventions in PD management.
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Affiliation(s)
- Raquel Luis-Martínez
- Department of Neurosciences, University of the Basque Country, (UPV/EHU), Leioa, Spain
- Parkinson and Movement Disorders Unit, Department of Neurosciences, University of Padova, Via Giustiniani 5, 35138, Padua, Italy
| | - Roberto Di Marco
- Parkinson and Movement Disorders Unit, Department of Neurosciences, University of Padova, Via Giustiniani 5, 35138, Padua, Italy
| | - Luca Weis
- Parkinson and Movement Disorders Unit, Department of Neurosciences, University of Padova, Via Giustiniani 5, 35138, Padua, Italy
| | - Valeria Cianci
- Parkinson and Movement Disorders Unit, Department of Neurosciences, University of Padova, Via Giustiniani 5, 35138, Padua, Italy
| | - Francesca Pistonesi
- Parkinson and Movement Disorders Unit, Department of Neurosciences, University of Padova, Via Giustiniani 5, 35138, Padua, Italy
| | - Alfonc Baba
- Rehabilitation Unit, Azienda Ospedaliera Universitaria di Padova, Padova, Italy
| | - Miryam Carecchio
- Parkinson and Movement Disorders Unit, Department of Neurosciences, University of Padova, Via Giustiniani 5, 35138, Padua, Italy
| | - Roberta Biundo
- Department of General Psychology, University of Padova, Padova, Italy
| | - Chiara Tedesco
- Parkinson and Movement Disorders Unit, Department of Neurosciences, University of Padova, Via Giustiniani 5, 35138, Padua, Italy
| | - Stefano Masiero
- Physical Medicine and Rehabilitation School, University of Padova, Padova, Italy
| | - Angelo Antonini
- Parkinson and Movement Disorders Unit, Department of Neurosciences, University of Padova, Via Giustiniani 5, 35138, Padua, Italy.
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Cruickshank T, Reyes A, Pulverenti TS, Rankin T, Bartlett DM, Blazevich AJ, Poudel G, Ziman M, Trajano GS. Rate of torque development and striatal shape in individuals with prodromal Huntington's disease. Sci Rep 2020; 10:15103. [PMID: 32934257 PMCID: PMC7492215 DOI: 10.1038/s41598-020-72042-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Accepted: 08/25/2020] [Indexed: 11/09/2022] Open
Abstract
The aim of the present study was to quantify explosive joint torque or the ability to develop joint torque rapidly, typically measured as the rate of torque development, in individuals with prodromal Huntington’s disease and healthy controls and its associations with measures of disease burden and striatal pathology. Twenty prodromal Huntington’s disease and 19 healthy control individuals volunteered for this study. Plantar flexor isometric rate of torque development values were evaluated using isokinetic dynamometry. Pathological changes in striatal shape were evaluated using magnetic resonance imaging. Disease burden was evaluated using the disease burden score and cytosine-adenine-guanine age product score. No statistical differences in the rate of torque development were observed between individuals with prodromal Huntington’s disease and healthy controls. However, significant associations were observed between the rate of torque development values and measures of disease burden (r = −0.42 to −0.69) and striatal pathology (r = 0.71–0.60) in individuals with prodromal Huntington’s disease. We found significant associations between lower rate of torque development values and greater striatal shape deflation and disease burden and striatal pathology in individuals with prodromal Huntington’s disease. While no significant differences in the rate of torque development were found between prodromal Huntington’s disease and healthy controls, the noted associations suggest that differences may emerge as the disease advances, which should be investigated longitudinally in future studies.
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Affiliation(s)
- Travis Cruickshank
- School of Medical and Health Sciences, Edith Cowan University, 270 Joondalup Drive, Joondalup, Perth, WA, 6027, Australia. .,Exercise Medicine Research Institute, School of Medical and Health Sciences, Edith Cowan University, Joondalup, WA, Australia.
| | - Alvaro Reyes
- Facultad de Ciencias de La Rehabilitacion, Universidad Andres Bello, Santiago, Chile
| | - Timothy S Pulverenti
- Department of Physical Therapy, College of Staten Island, City University of New York, Staten Island, NY, USA
| | - Tim Rankin
- School of Medical and Health Sciences, Edith Cowan University, 270 Joondalup Drive, Joondalup, Perth, WA, 6027, Australia
| | - Danielle M Bartlett
- School of Medical and Health Sciences, Edith Cowan University, 270 Joondalup Drive, Joondalup, Perth, WA, 6027, Australia
| | - Anthony J Blazevich
- School of Medical and Health Sciences, Edith Cowan University, 270 Joondalup Drive, Joondalup, Perth, WA, 6027, Australia.,Centre for Exercise and Sports Science (CESSR), Edith Cowan University, Joondalup, WA, Australia
| | - Govinda Poudel
- Mary Mackillop Institute for Health Research, Australian Catholic University, Melbourne, Australia
| | - Mel Ziman
- School of Medical and Health Sciences, Edith Cowan University, 270 Joondalup Drive, Joondalup, Perth, WA, 6027, Australia.,School of Biomedical Science, University of Western Australia, Crawley, WA, Australia
| | - Gabriel S Trajano
- School of Exercise and Nutrition Sciences, Faculty of Health, Queensland University of Technology (QUT), Brisbane, Australia
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da Silva Soares F, Moreira VMPS, Alves LV, Dionisio VC. What is the influence of severity levels of knee osteoarthritis on gait initiation? Clin Biomech (Bristol, Avon) 2020; 74:51-57. [PMID: 32145669 DOI: 10.1016/j.clinbiomech.2020.02.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Revised: 02/07/2020] [Accepted: 02/13/2020] [Indexed: 02/06/2023]
Abstract
BACKGROUND The anticipatory postural adjustments required for gait initiation have not yet been investigated in older adults with different levels of severity of knee osteoarthritis. This study aimed to evaluate the anticipatory postural adjustments adopted by older adults with different severity levels of knee osteoarthritis during gait initiation. METHODS Sixty-seven older adults with knee osteoarthritis (mild, moderate, and severe levels) and 11 healthy older adults control were evaluated bilaterally with a force plate to analyze gait initiation. The center of pressure trajectory during gait initiation was divided into four phases: three anticipatory postural adjustments, and a locomotor phase. The length, duration, and velocity of each phase were calculated. FINDINGS The results showed that during the right and left limbs swing forward, the severe and moderate knee osteoarthritis groups presented a significant reduction in the length of anticipatory postural adjustment phases, locomotion, duration, and velocity (P < 0.05). The severe knee osteoarthritis group presented a significantly higher body mass index (P < 0.003) than the other groups. However, just the healthy group presented a correlation between body mass index and anticipatory postural adjustments. INTERPRETATION Our results demonstrated that older adults with severe and moderate levels of knee osteoarthritis adopt longer lasting and slower anticipatory postural adjustment phases, lower locomotion, and lower center of pressure displacement during gait initiation, suggesting that this population has adaptive strategy in performing gait initiation, which is significantly changed by the knee osteoarthritis severity level.
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Affiliation(s)
- Fabiana da Silva Soares
- Doctor Program in Health Sciences, Faculty of Medicine, Federal University of Uberlândia, Uberlândia, Brazil.
| | | | - Luiza Vinhal Alves
- Physical Therapy Course, Federal University of Uberlandia, Uberlândia, Brazil
| | - Valdeci Carlos Dionisio
- Physical Therapy Course, Federal University of Uberlandia, Uberlândia, Brazil; Doctor Program in Health Sciences, Faculty of Medicine, Federal University of Uberlândia, Uberlândia, Brazil.
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20
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Muthukrishnan N, Abbas JJ, Shill HA, Krishnamurthi N. Cueing Paradigms to Improve Gait and Posture in Parkinson's Disease: A Narrative Review. Sensors (Basel) 2019; 19:s19245468. [PMID: 31835870 PMCID: PMC6960538 DOI: 10.3390/s19245468] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/11/2019] [Revised: 12/09/2019] [Accepted: 12/09/2019] [Indexed: 12/24/2022]
Abstract
Progressive gait dysfunction is one of the primary motor symptoms in people with Parkinson’s disease (PD). It is generally expressed as reduced step length and gait speed and as increased variability in step time and step length. People with PD also exhibit stooped posture which disrupts gait and impedes social interaction. The gait and posture impairments are usually resistant to the pharmacological treatment, worsen as the disease progresses, increase the likelihood of falls, and result in higher rates of hospitalization and mortality. These impairments may be caused by perceptual deficiencies (poor spatial awareness and loss of temporal rhythmicity) due to the disruptions in processing intrinsic information related to movement initiation and execution which can result in misperceptions of the actual effort required to perform a desired movement and maintain a stable posture. Consequently, people with PD often depend on external cues during execution of motor tasks. Numerous studies involving open-loop cues have shown improvements in gait and freezing of gait (FoG) in people with PD. However, the benefits of cueing may be limited, since cues are provided in a consistent/rhythmic manner irrespective of how well a person follows them. This limitation can be addressed by providing feedback in real-time to the user about performance (closed-loop cueing) which may help to improve movement patterns. Some studies that used closed-loop cueing observed improvements in gait and posture in PD, but the treadmill-based setup in a laboratory would not be accessible outside of a research setting, and the skills learned may not readily and completely transfer to overground locomotion in the community. Technologies suitable for cueing outside of laboratory environments could facilitate movement practice during daily activities at home or in the community and could strongly reinforce movement patterns and improve clinical outcomes. This narrative review presents an overview of cueing paradigms that have been utilized to improve gait and posture in people with PD and recommends development of closed-loop wearable systems that can be used at home or in the community to improve gait and posture in PD.
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Affiliation(s)
- Niveditha Muthukrishnan
- Center for Adaptive Neural Systems, School of Biological and Health Systems Engineering, Arizona State University, Tempe, AZ 85287, USA; (N.M.); (J.J.A.)
| | - James J. Abbas
- Center for Adaptive Neural Systems, School of Biological and Health Systems Engineering, Arizona State University, Tempe, AZ 85287, USA; (N.M.); (J.J.A.)
| | - Holly A. Shill
- Muhammad Ali Parkinson Center, Barrow Neurological Institute, St. Joseph’s Hospital and Medical Center, Phoenix, AZ 85013, USA;
| | - Narayanan Krishnamurthi
- Center for Adaptive Neural Systems, School of Biological and Health Systems Engineering, Arizona State University, Tempe, AZ 85287, USA; (N.M.); (J.J.A.)
- Edson College of Nursing and Health Innovation, Arizona State University, Phoenix, AZ 85004, USA
- Correspondence: ; Tel.: +1-(602)-496-0912
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Bussey MD, Aldabe D, Shemmell J, Jowett T. Anticipatory postural control differs between low back pain and pelvic girdle pain patients in the absence of visual feedback. Hum Mov Sci 2019; 69:102529. [PMID: 31726292 DOI: 10.1016/j.humov.2019.102529] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Revised: 10/06/2019] [Accepted: 10/06/2019] [Indexed: 11/16/2022]
Abstract
PURPOSE The aim of this study was to examine the effect of vision on anticipatory postural control (APA) responses in two groups of clinically diagnosed chronic low back pain patients, those with Posterior Pelvic Girdle pain and those with Non-Specific Low Back Pain compared to a matched group of healthy controls during the modified Trendelenburg task. METHODS Seventy-eight volunteer participants (60 females and 18 males) gave informed consent to take part in this study. 39 with confirmed LBP or PGP lasting longer than 12 weeks and 39 healthy matched controls performed 40 single leg lift tasks (hip flexion to 90° as quickly as possible) with their non-dominant lower limb. A force plate was used to determine the medial-lateral displacement of the center of pressure, and the initiation of weight shift; kinematics was used to determine initiation of leg lift; and electromyography was used to determine onset times from the external oblique (EO), internal oblique (IO) and lumbar multifidus (MF), gluteus maximus (GM) and biceps femoris (BF). RESULTS The PGP group showed significantly longer muscle onset latencies in the BF, EO MF with visual occlusion (F2,746 = 4.51, p < .0001). CONCLUSION The muscle onset delays identified between the two LBP sub-groups suggests that pain may not be the primary factor in alteration of APA response. The PGP group show a greater reliance on vision which may signal impairment in multiple feedback channels.
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Affiliation(s)
- Melanie D Bussey
- School of Physical Education, Sport and Exercise Sciences, University of Otago, Dunedin 9013, New Zealand.
| | - Daniela Aldabe
- Department of Anatomy, University of Otago, Dunedin 9013, New Zealand.
| | - Jonathan Shemmell
- Neural Control of Movement Lab, Medical and Exercise Science, School of Medicine, University of Wollongong, Australia.
| | - Tim Jowett
- Department of Mathematics & Statistics, University of Otago, Dunedin 9013, New Zealand.
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Hasegawa N, Shah VV, Carlson-Kuhta P, Nutt JG, Horak FB, Mancini M. How to Select Balance Measures Sensitive to Parkinson's Disease from Body-Worn Inertial Sensors-Separating the Trees from the Forest. Sensors (Basel) 2019; 19:s19153320. [PMID: 31357742 PMCID: PMC6696209 DOI: 10.3390/s19153320] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Revised: 07/24/2019] [Accepted: 07/25/2019] [Indexed: 11/16/2022]
Abstract
This study aimed to determine the most sensitive objective measures of balance dysfunction that differ between people with Parkinson’s Disease (PD) and healthy controls. One-hundred and forty-four people with PD and 79 age-matched healthy controls wore eight inertial sensors while performing tasks to measure five domains of balance: standing posture (Sway), anticipatory postural adjustments (APAs), automatic postural responses (APRs), dynamic posture (Gait) and limits of stability (LOS). To reduce the initial 93 measures, we selected uncorrelated measures that were most sensitive to PD. After applying a threshold on the Standardized Mean Difference between PD and healthy controls, 44 measures remained; and after reducing highly correlated measures, 24 measures remained. The four most sensitive measures were from APAs and Gait domains. The random forest with 10-fold cross-validation on the remaining measures (n = 24) showed an accuracy to separate PD from healthy controls of 82.4%—identical to result for all measures. Measures from the most sensitive domains, APAs and Gait, were significantly correlated with the severity of disease and with patient-related outcomes. This method greatly reduced the objective measures of balance to the most sensitive for PD, while still capturing four of the five domains of balance.
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Affiliation(s)
- Naoya Hasegawa
- Department of Neurology, Oregon Health & Science University, Portland, OR 97239-3098, USA
| | - Vrutangkumar V Shah
- Department of Neurology, Oregon Health & Science University, Portland, OR 97239-3098, USA
| | - Patricia Carlson-Kuhta
- Department of Neurology, Oregon Health & Science University, Portland, OR 97239-3098, USA
| | - John G Nutt
- Department of Neurology, Oregon Health & Science University, Portland, OR 97239-3098, USA
| | - Fay B Horak
- Department of Neurology, Oregon Health & Science University, Portland, OR 97239-3098, USA
| | - Martina Mancini
- Department of Neurology, Oregon Health & Science University, Portland, OR 97239-3098, USA.
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23
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Godi M, Giardini M, Schieppati M. Walking Along Curved Trajectories. Changes With Age and Parkinson's Disease. Hints to Rehabilitation. Front Neurol 2019; 10:532. [PMID: 31178816 PMCID: PMC6543918 DOI: 10.3389/fneur.2019.00532] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Accepted: 05/03/2019] [Indexed: 01/11/2023] Open
Abstract
In this review, we briefly recall the fundamental processes allowing us to change locomotion trajectory and keep walking along a curved path and provide a review of contemporary literature on turning in older adults and people with Parkinson's Disease (PD). The first part briefly summarizes the way the body exploits the physical laws to produce a curved walking trajectory. Then, the changes in muscle and brain activation underpinning this task, and the promoting role of proprioception, are briefly considered. Another section is devoted to the gait changes occurring in curved walking and steering with aging. Further, freezing during turning and rehabilitation of curved walking in patients with PD is mentioned in the last part. Obviously, as the research on body steering while walking or turning has boomed in the last 10 years, the relevant critical issues have been tackled and ways to improve this locomotor task proposed. Rationale and evidences for successful training procedures are available, to potentially reduce the risk of falling in both older adults and patients with PD. A better understanding of the pathophysiology of steering, of the subtle but vital interaction between posture, balance, and progression along non-linear trajectories, and of the residual motor learning capacities in these cohorts may provide solid bases for new rehabilitative approaches.
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Affiliation(s)
- Marco Godi
- Division of Physical Medicine and Rehabilitation, ICS Maugeri SPA SB, Pavia, Italy
| | - Marica Giardini
- Division of Physical Medicine and Rehabilitation, ICS Maugeri SPA SB, Pavia, Italy
| | - Marco Schieppati
- Department of Exercise and Sport Science, International University of Health, Exercise and Sports, LUNEX University, Differdange, Luxembourg
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24
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Papa EV, Addison O, Foreman KB, Dibble LE. Reproducibility and responsiveness of gait initiation in Parkinson's disease. J Biomech 2019; 87:197-201. [PMID: 30910362 DOI: 10.1016/j.jbiomech.2019.03.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2018] [Revised: 02/09/2019] [Accepted: 03/09/2019] [Indexed: 11/28/2022]
Abstract
Persons with Parkinson's disease (PD) have significant impairments in functional mobility, including the ability to initiate gait. Three-dimensional analysis of kinetic and kinematic outcomes has become one of the most powerful tools in evaluating abnormalities in gait initiation for persons with PD. Surprisingly however, the psychometric properties of spatial and temporal measures of gait initiation for persons with PD have not been established using force-platforms. The purposes of this study were to determine the reliability of kinetic and kinematic measures of gait initiation and to identify the minimal detectable change of these measures in persons with PD during On and Off medication conditions. Sixteen participants with idiopathic PD performed a series of 3 repeated trials of gait initiation by starting from a quiet stance position on 2 AMTI OR-6 force platforms, and walking forward across the floor following a signal from the investigators. Testing was performed first in the Off medication condition, after which participants took their medication and waited 60 min before repeating the gait initiation assessments. Relative test-retest reliability was good-to-excellent for most outcome measures (range 0.417-0.960). Bland-Altman analysis revealed no systematic variance in the majority of outcome measures when tested in distinct medication conditions (On vs. Off medication). Most outcome measures required low-to-moderate amounts of change (<50%) to indicate true change in individual participants. These results suggest that spatial and temporal measures of gait initiation using force-platforms are highly reliable and responsive to changes in performance for persons with PD, regardless of whether individuals are optimally medicated.
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Affiliation(s)
- Evan V Papa
- Idaho State University-Meridian Health Science Center, Department of Physical & Occupational Therapy, 1311 E. Central Dr., Meridian, ID 83642, USA.
| | - Odessa Addison
- University of Maryland-School of Medicine, Department of Physical Therapy and Rehabilitation Science, 10 N. Greene St., Baltimore, MD 21201, USA.
| | - K Bo Foreman
- University of Utah, Department of Physical Therapy and Athletic Training, 520 Wakara Way, Salt Lake City, UT 84108, USA.
| | - Leland E Dibble
- University of Utah, Department of Physical Therapy and Athletic Training, 520 Wakara Way, Salt Lake City, UT 84108, USA.
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25
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Mills R, Levac D, Sveistrup H. Kinematics and postural muscular activity during continuous oscillating platform movement in children and adolescents with cerebral palsy. Gait Posture 2018; 66:13-20. [PMID: 30138742 DOI: 10.1016/j.gaitpost.2018.08.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Revised: 07/25/2018] [Accepted: 08/07/2018] [Indexed: 02/02/2023]
Abstract
BACKGROUND Reactive and anticipatory postural activity has been described in single discrete perturbations in youth with cerebral palsy (CP) but not in continuous perturbation situations. RESEARCH QUESTION We sought to determine how the ability to control postural responses (as reflected in the number of steps taken, postural muscle activity, and marker-pair trajectory cross-correlations) compares between typically developing (TD) youth and age-matched youth with CP when exposed to various frequencies of continuous platform oscillation. We also sought to determine if youth with CP could further modify postural activity based on knowledge of platform movement. METHODS Eleven youth with CP and sixteen TD youth aged 7-17 years stood with eyes open on a movable platform progressively translated antero-posteriorly through four speeds in experimenter-triggered and self-triggered perturbations. Postural muscle activity and 3D kinematics were recorded. The Anchoring Index and marker-pair trajectories were used to quantify body stabilization strategies. Transition states and steady states were analysed. Mann Whitney-U tests analysed between-group differences at each frequency. RESULTS At lower frequencies (0.1 and 0.25 Hz) youth with CP behaved like age-matched TD controls. At higher frequencies (0.5 and 0.61 Hz), youth with CP took a greater number of steps, had a preference for stabilizing their head on the trunk, had low marker-pair correlations with high temporal lag, and showed increased tonic activity compared to their TD peers. SIGNIFICANCE Higher frequency platform movements proved more difficult for youth with CP, however, like TD youth, they shifted from reactive to anticipatory mechanisms when the platform frequency remained constant by taking advantage of knowledge of platform movement. When given control over perturbation onset, further evidence of anticipatory mechanisms was observed following the transition to a new oscillation frequency.
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Affiliation(s)
- Richard Mills
- Schools of Human Kinetics, University of Ottawa, Ottawa, Ontario, Canada; Department of Sport and Exercise Sciences, Manchester Metropolitan University, Manchester, United Kingdom
| | - Danielle Levac
- Rehabilitation Sciences, University of Ottawa, Ottawa, Ontario, Canada; Department of Physical Therapy, Movement and Rehabilitation Sciences, Northeastern University, Boston, Massachusetts, United States
| | - Heidi Sveistrup
- Schools of Human Kinetics, University of Ottawa, Ottawa, Ontario, Canada; Rehabilitation Sciences, University of Ottawa, Ottawa, Ontario, Canada.
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26
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Peterson DS, Lohse KR, Mancini M. Relating Anticipatory Postural Adjustments to Step Outcomes During Loss of Balance in People With Parkinson's Disease. Neurorehabil Neural Repair 2018; 32:887-898. [PMID: 30198384 DOI: 10.1177/1545968318798937] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND Effective protective steps are critical for fall prevention, and anticipatory postural adjustments (APAs) after a perturbation but prior to protective steps affect step performance. Although APAs prior to protective steps are altered in people with Parkinson's disease (PD), whether these changes affect subsequent step performance is poorly understood. OBJECTIVE Characterize the relationship between mediolateral APA size and protective step outcomes in response to anteroposterior balance perturbations in people with PD. METHODS Twenty-eight individuals with PD completed 25 forward and 25 backward protective steps in response to support surface translations. Multilevel linear models related mediolateral APA size to protective step outcomes. RESULTS During forward protective stepping, larger mediolateral APAs were associated with delayed ( P < .001) and larger ( P = .004) steps. Larger APAs were also associated with smaller mediolateral ( P < .001) but larger anterior-posterior center of mass movement at foot off ( P < .001). During backward stepping, larger APAs were associated with later steps ( P < .001) and smaller anterior-posterior margin of stability at first foot contact ( P < .001). During backward stepping, larger APAs were also associated with worse clinical (ie, UPDRS [Unified Parkinson's Disease Rating Scale]; P = .005) and balance (ie, MiniBEST [Mini-Balance Evaluation Systems Test]; P = .021) outcomes. CONCLUSIONS During forward protective stepping, larger APAs were associated with larger and later steps, suggesting APA size may have mixed effects on the subsequent step. During backward stepping, larger APAs were associated with worse stepping outcomes (ie, later steps, smaller anterior-posterior margin of stability, worse clinical outcomes). Interventions aimed at improving APAs in PD should monitor spatial and temporal protective step outcomes to ensure treatment does not negatively affect protective steps, particularly for forward stepping.
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Affiliation(s)
- Daniel S Peterson
- 1 Arizona State University, Phoenix, AZ, USA.,2 Phoenix Veterans Affairs Medical Center, Phoenix, AZ, USA
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27
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Peterson DS, Lohse KR, Mancini M. Anticipatory postural responses prior to protective steps are not different in people with PD who do and do not freeze. Gait Posture 2018; 64:126-129. [PMID: 29902715 PMCID: PMC8447840 DOI: 10.1016/j.gaitpost.2018.06.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/03/2018] [Revised: 05/24/2018] [Accepted: 06/04/2018] [Indexed: 02/02/2023]
Abstract
BACKGROUND Protective stepping after a loss of balance is related to falls. Anticipatory postural responses (APAs) prior to protective stepping can impact step performance, may be larger in people with PD, and have been suggested to be related to freezing of gait (FOG). However, whether people with PD and FOG (PD + FOG) exhibit larger APAs than people with PD and no FOG (PD-FOG) is unknown. RESEARCH QUESTION Determine the impact of freezing status on APAs prior to protective steps, thus providing a better understanding of the link between FOG and APAs. METHODS Twenty-eight people with PD (13 PD + FOG) were exposed to 50 support surface translations (25 forward, 25 backward, random order) resulting in protective steps. The size of medio-lateral weight shifts prior to the protective step (i.e. APAs), and the percentage of trials with an APA were calculated via force-plates. FOG status was assessed at the time of testing as well as 3.25(+/-0.43) years later. Participants without FOG at testing, but with FOG at follow-up were identified as "converters". RESULTS AND SIGNIFICANCE For both forward and backward protective stepping, size and percentage trials with an APA were not statistically different between PD + FOG and PD-FOG, even after excluding converters from the PD-FOG group (p > 0.27 for all). No group by direction interactions were observed. These data suggest that, in mild to moderate PD, an inability to couple APAs with stepping, rather than an inappropriately sized APA, may be most related to freezing of gait.
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Affiliation(s)
- D S Peterson
- Arizona State University, Phoenix, AZ, United States; Phoenix Veterans Affairs Medical Center, Phoenix, AZ, United States.
| | - K R Lohse
- University of Utah, Salt Lake City, UT, United States
| | - M Mancini
- Oregon Health & Science University, Portland, OR, United States
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28
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Schlenstedt C, Mancini M, Nutt J, Hiller AP, Maetzler W, Deuschl G, Horak F. Are Hypometric Anticipatory Postural Adjustments Contributing to Freezing of Gait in Parkinson's Disease? Front Aging Neurosci 2018; 10:36. [PMID: 29497374 PMCID: PMC5818427 DOI: 10.3389/fnagi.2018.00036] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Accepted: 01/30/2018] [Indexed: 11/21/2022] Open
Abstract
Introduction: This study aims at investigating whether impaired anticipatory postural adjustments (APA) during gait initiation contribute to the occurrence of freezing of gait (FOG) or whether altered APAs compensate for FOG in Parkinson’s disease (PD). Methods: Gait initiation after 30 s quiet stance was analyzed without and with a cognitive dual task (DT) in 33 PD subjects with FOG (PD+FOG), 30 PD subjects without FOG (PD-FOG), and 32 healthy controls (HC). APAs were characterized with inertial sensors and muscle activity of the tensor fasciae latae (TFL), gastrocnemius, and tibialis anterior was captured with electromyography recordings. Nine trials (of 190) were associated with start hesitation/FOG and analyzed separately. Results: PD+FOG and PD-FOG did not differ in disease duration, disease severity, age, or gender. PD+FOG had significantly smaller medio-lateral (ML) and anterio-posterior APAs compared to PD-FOG (DT, p < 0.05). PD+FOG had more co-contraction of left and right TFL during APAs compared to PD-FOG (p < 0.01). Within the PD+FOG, the ML size of APA (DT) was positively correlated with the severity of FOG history (NFOG-Q), with larger APAs associated with worse FOG (rho = 0.477, p = 0.025). ML APAs were larger during trials with observed FOG compared to trials of PD+FOG without FOG. Conclusions: People with PD who have a history of FOG have smaller ML APAs (weight shifting) during gait initiation compared to PD-FOG and HC. However, start hesitation (FOG) is not caused by an inability to sufficiently displace the center of mass toward the stance leg because APAs were larger during trials with observed FOG. We speculate that reducing the acceleration of the body center of mass with hip abductor co-contraction for APAs might be a compensatory strategy in PD+FOG, to address postural control deficits and enable step initiation.
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Affiliation(s)
- Christian Schlenstedt
- Department of Neurology, University Hospital Schleswig-Holstein, Christian-Albrechts-University, Kiel, Germany.,Balance Disorders Laboratory, Oregon Health & Science University, Portland, OR, United States
| | - Martina Mancini
- Balance Disorders Laboratory, Oregon Health & Science University, Portland, OR, United States
| | - Jay Nutt
- Balance Disorders Laboratory, Oregon Health & Science University, Portland, OR, United States
| | - Amie P Hiller
- Balance Disorders Laboratory, Oregon Health & Science University, Portland, OR, United States
| | - Walter Maetzler
- Department of Neurology, University Hospital Schleswig-Holstein, Christian-Albrechts-University, Kiel, Germany
| | - Günther Deuschl
- Department of Neurology, University Hospital Schleswig-Holstein, Christian-Albrechts-University, Kiel, Germany
| | - Fay Horak
- Balance Disorders Laboratory, Oregon Health & Science University, Portland, OR, United States
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29
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Lagravinese G, Pelosin E, Bonassi G, Carbone F, Abbruzzese G, Avanzino L. Gait initiation is influenced by emotion processing in Parkinson's disease patients with freezing. Mov Disord 2018; 33:609-617. [PMID: 29392774 DOI: 10.1002/mds.27312] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Revised: 12/22/2017] [Accepted: 12/22/2017] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND Freezing of gait is a symptom that affects more than 50% of Parkinson's disease (PD) patients and increasing evidence suggests that nonmotor systems (i.e., limbic system) are involved in its underlying mechanisms. OBJECTIVE The objective of this study was to investigate whether gait initiation characteristics are influenced by emotional stimuli in patients with PD, with or without freezing of gait. METHODS A total of 44 participants, divided into 3 groups (15 PD patients with and 15 PD patients without freezing of gait and 14 controls), stood on a sensorized mat and were asked to take a step forward in response to a pleasant image and a step backward in response to an unpleasant one (congruent task, low cognitive load) or to take a step backward in response to a pleasant image and a step forward in response to an unpleasant one (incongruent task, high cognitive load). Reaction time, step size, anticipatory postural adjustments, and sway path were measured. RESULTS In PD with freezing of gait, the reaction time was longer and the step size was shorter than in the other groups when they took a step forward in response to an unpleasant image (incongruent task). Changes in reaction time performance in response to unpleasant images remained significant after having adjusted for executive dysfunction and positively correlated with the "frequency" of freezing episodes. CONCLUSIONS This study demonstrates that gait initiation was influenced by the emotional valence of visual stimuli in addition to the cognitive load of the task suggesting that the limbic system may be involved in freezing of gait. © 2018 International Parkinson and Movement Disorder Society.
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Affiliation(s)
- Giovanna Lagravinese
- Department of Experimental Medicine, Section of Human Physiology and Centro Polifunzionale di Scienze Motorie, University of Genova, Genova, Italy
| | - Elisa Pelosin
- Department of Neuroscience, Rehabilitation, Ophthalmology, Genetics and Maternal Child Health, University of Genova, Genova, Italy.,Ospedale Policlinico San Martino, Istituto di Ricovero e Cura a Carattere Scientifico per l'Oncologia, Genova, Italy
| | - Gaia Bonassi
- Department of Experimental Medicine, Section of Human Physiology and Centro Polifunzionale di Scienze Motorie, University of Genova, Genova, Italy
| | - Federico Carbone
- Department of Neuroscience, Rehabilitation, Ophthalmology, Genetics and Maternal Child Health, University of Genova, Genova, Italy
| | - Giovanni Abbruzzese
- Department of Neuroscience, Rehabilitation, Ophthalmology, Genetics and Maternal Child Health, University of Genova, Genova, Italy.,Ospedale Policlinico San Martino, Istituto di Ricovero e Cura a Carattere Scientifico per l'Oncologia, Genova, Italy
| | - Laura Avanzino
- Department of Experimental Medicine, Section of Human Physiology and Centro Polifunzionale di Scienze Motorie, University of Genova, Genova, Italy.,Ospedale Policlinico San Martino, Istituto di Ricovero e Cura a Carattere Scientifico per l'Oncologia, Genova, Italy
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30
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Abstract
Impairments of balance and gait leading to loss of mobility, falls, and disability are common occurrences in many neurologic conditions and with older age. Much of our current understanding about posture and balance control and its impairments has come from investigations of how healthy individuals and those with neurologic disorders respond to situations that perturb standing balance during instructed voluntary tasks or in reaction to externally imposed challenges to stability. Knowledge obtained from these investigations has come from documenting the physical and physiologic characteristics of the perturbations together with the body's electrophysiologic, structural, kinetic, kinematic, and behavioral responses. From these findings, basic mechanisms, diagnostic and pathologic criteria, and targets for clinical care have been identified while continued gaps in understanding have been exposed. In this chapter, we synthesize and discuss current concepts and understanding concerning the sensorimotor control of posture and balance while standing. We draw insights gained from perturbation studies investigating these functions in healthy adults, and those with neurologic pathologies.
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Affiliation(s)
- Mark W Rogers
- Department of Physical Therapy and Rehabilitation Science, University of Maryland School of Medicine, Baltimore, MD, United States.
| | - Marie-Laure Mille
- Faculty of Sciences and Techniques of Physical Activities and Sport, Université de Toulon, La Garde, France; Institute of Movement Sciences ISM UMR7287, Aix-Marseille Université & CNRS, Marseille, France; Department of Physical Therapy and Human Movement Sciences, Northwestern University Medical School, Chicago IL, United States
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31
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Sprenger A, Wojak JF, Jandl NM, Helmchen C. Postural Control in Bilateral Vestibular Failure: Its Relation to Visual, Proprioceptive, Vestibular, and Cognitive Input. Front Neurol 2017; 8:444. [PMID: 28919878 PMCID: PMC5585141 DOI: 10.3389/fneur.2017.00444] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2017] [Accepted: 08/14/2017] [Indexed: 02/04/2023] Open
Abstract
Patients with bilateral vestibular failure (BVF) suffer from postural and gait unsteadiness with an increased risk of falls. The aim of this study was to elucidate the differential role of otolith, semicircular canal (SSC), visual, proprioceptive, and cognitive influences on the postural stability of BVF patients. Center-of-pressure displacements were recorded by posturography under six conditions: target visibility; tonic head positions in the pitch plane; horizontal head shaking; sensory deprivation; dual task; and tandem stance. Between-group analysis revealed larger postural sway in BVF patients on eye closure; but with the eyes open, BVF did not differ from healthy controls (HCs). Head tilts and horizontal head shaking increased sway but did not differ between groups. In the dual task condition, BVF patients maintained posture indistinguishable from controls. On foam and tandem stance, postural sway was larger in BVF, even with the eyes open. The best predictor for the severity of bilateral vestibulopathy was standing on foam with eyes closed. Postural control of our BVF was indistinguishable from HCs once visual and proprioceptive feedback is provided. This distinguishes them from patients with vestibulo-cerebellar disorders or functional dizziness. It confirms previous reports and explains that postural unsteadiness of BVF patients can be missed easily if not examined by conditions of visual and/or proprioceptive deprivation. In fact, the best predictor for vestibular hypofunction (VOR gain) was examining patients standing on foam with the eyes closed. Postural sway in that condition increased with the severity of vestibular impairment but not with disease duration. In the absence of visual control, impaired otolith input destabilizes BVF with head retroflexion. Stimulating deficient SSC does not distinguish patients from controls possibly reflecting a shift of intersensory weighing toward proprioceptive-guided postural control. Accordingly, proprioceptive deprivation heavily destabilizes BVF, even when visual control is provided.
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Affiliation(s)
- Andreas Sprenger
- Department of Neurology, University of Lübeck, Lubeck, Germany.,Institute of Psychology II, University of Lübeck, Lubeck, Germany
| | - Jann F Wojak
- Department of Neurology, University of Lübeck, Lubeck, Germany
| | - Nico M Jandl
- Department of Neurology, University of Lübeck, Lubeck, Germany
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