Superficial Shoulder Muscle Synergy Analysis in Facioscapulohumeral Dystrophy During Humeral Elevation Tasks

Essers, J M N Hans; Peters, Anneliek; Meijer, Kenneth; Peters, Koen; Murgia, Alessio

doi:10.1109/tnsre.2019.2927765

Cited by 9 publications

(14 citation statements)

References 44 publications

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“…VAF was defined as the uncentered Pearson correlation coefficient between W × C and the EMG amplitude time series. To compare spatio-temporal characteristics, individual synergies obtained from different subjects were pooled and matched based on the correlation of their structure (muscle weightings in each synergy of W) using a custom cluster analysis algorithm [43]. If a synergy showed equal correlation to more clusters, that synergy remained in the pool it was initially assigned to.…”

Section: Synergy Extraction and Data Analysesmentioning

confidence: 99%

Age-Related Differences in Muscle Synergy Organization during Step Ascent at Different Heights and Directions

et al. 2020

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The aim of this study was to explore the underlying age-related differences in dynamic motor control during different step ascent conditions using muscle synergy analysis. Eleven older women (67.0 y ± 2.5) and ten young women (22.5 y ± 1.6) performed stepping in forward and lateral directions at step heights of 10, 20 and 30 cm. Surface electromyography was obtained from 10 lower limb and torso muscles. Non-negative matrix factorization was used to identify sets of (n) synergies across age groups and stepping conditions. In addition, variance accounted for (VAF) by the detected number of synergies was compared to assess complexity of motor control. Finally, correlation coefficients of muscle weightings and between-subject variability of the temporal activation patterns were calculated and compared between age groups and stepping conditions. Four synergies accounted for >85% VAF across age groups and stepping conditions. Age and step height showed a significant negative correlation with VAF during forward stepping but not lateral stepping, with lower VAF indicating higher synergy complexity. Muscle weightings showed higher similarity across step heights in older compared to young women. Neuromuscular control of young and community-dwelling older women could not be differentiated based on the number of synergies extracted. Additional analyses of synergy structure and complexity revealed subtle age- and step-height-related differences, indicating that older women rely on more complex neuromuscular control strategies.

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Section: Synergy Extraction and Data Analysesmentioning

confidence: 99%

Age-Related Differences in Muscle Synergy Organization during Step Ascent at Different Heights and Directions

et al. 2020

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“…However, as also pointed out by experts, the interaction between 1) muscle activity and joint mobility and 2) how this is affected by disease and 3) how this could be restored by the device should be investigated. Stabilizing and facilitating the shoulder girdle requires relatively complex muscle coordination, which is affected in people with NMD (Bergsma et al, 2014;de Baets et al, 2014;Essers et al, 2019).…”

Section: Unaddressed Framework Cellsmentioning

confidence: 99%

Recommendations for Studies on Dynamic Arm Support Devices in People with Neuromuscular Disorders: a Scoping Review with Expert-Based Discussion

Essers¹

2020

Preprint

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Neuromuscular disorders are characterized by muscle weakness that limits upper extremity mobility, but can be alleviated with dynamic arm support devices. Current research highlights the importance and difficulties of evidence-based recommendations for device development. We aim to provide research recommendations primarily concerning upper extremity body functions, and secondarily activity and participation, environmental and personal factors. Evidence was synthesized from literature, ongoing studies, and expert opinions and tabulated within a framework based on a combination of the ICF model and contextual constructs. Current literature mostly investigated the motor capacity of muscle function, joint mobility, and upper body functionality, and a few studies also addressed the impact on activity and participation. In addition, experts considered knowledge on device utilization in the daily environment and characterizing the beneficiaries better important. Knowledge gaps showed that ICF model components and contextual constructs should be better integrated and more actively included in future research. First, integrate multiple ICF model components and contextual constructs within one study design. Second, include the influence of environmental and personal factors when developing and deploying a device. Third, include short-term and long-term measurements to monitor adaptations over time. Finally, include user satisfaction as guidance to evaluate the device effectiveness.

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“…However, as also pointed out by experts, the interaction between (1) muscle activity and joint mobility and (2) how this is affected by disease and (3) how this could be restored by the device should be investigated. Stabilising and facilitating the shoulder girdle requires relatively complex muscle coordination, which is affected in people with NMD [36][37][38]. Experts believe that insights into how muscle coordination is affected would benefit the development of a suitable DAS and to optimise a device to fit the individual requirements [5,39].…”

Section: Unaddressed Framework Cellsmentioning

confidence: 99%

Recommendations for studies on dynamic arm support devices in people with neuromuscular disorders: a scoping review with expert-based discussion

Essers

Murgia

Peters

et al. 2020

Disability and Rehabilitation: Assistive Technology

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Purpose: Neuromuscular disorders are characterised by muscle weakness that limits upper extremity mobility, but can be alleviated with dynamic arm support devices. Current research highlights the importance and difficulties of evidence-based recommendations for device development. We aim to provide research recommendations primarily concerning upper extremity body functions, and secondarily activity and participation, environmental and personal factors. Methods: Evidence was synthesised from literature, ongoing studies, and expert opinions and tabulated within a framework based on a combination of the International Classification of Functioning, Disability and Health (ICF) model and contextual constructs. Results: Current literature mostly investigated the motor capacity of muscle function, joint mobility, and upper body functionality, and a few studies also addressed the impact on activity and participation. In addition, experts considered knowledge on device utilisation in the daily environment and characterising the beneficiaries better as important. Knowledge gaps showed that ICF model components and contextual constructs should be better integrated and more actively included in future research. Conclusions: It is recommended to, first, integrate multiple ICF model components and contextual constructs within one study design. Second, include the influence of environmental and personal factors when developing and deploying a device. Third, include short-term and long-term measurements to monitor adaptations over time. Finally, include user satisfaction as guidance to evaluate the device effectiveness. ä IMPLICATIONS ON REHABILITATION Synthesized evidence will support future research and development of dynamic arm supports. Tabulated evidence stresses the importance of integrating ICF model components and contextual constructs to fill the knowledge gaps. Presented knowledge gaps and proposed steps guide the set up of future studies on dynamic arm supports ARTICLE HISTORY

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Superficial Shoulder Muscle Synergy Analysis in Facioscapulohumeral Dystrophy During Humeral Elevation Tasks

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Cited by 9 publications

References 44 publications

Age-Related Differences in Muscle Synergy Organization during Step Ascent at Different Heights and Directions

Age-Related Differences in Muscle Synergy Organization during Step Ascent at Different Heights and Directions

Recommendations for Studies on Dynamic Arm Support Devices in People with Neuromuscular Disorders: a Scoping Review with Expert-Based Discussion

Recommendations for studies on dynamic arm support devices in people with neuromuscular disorders: a scoping review with expert-based discussion

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