Comparing the Difference in Muscle Synergies Between Healthy Participants and Chronic Stroke Survivors
NCT ID: NCT04155866
Last Updated: 2025-12-26
Study Results
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Basic Information
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COMPLETED
30 participants
OBSERVATIONAL
2021-07-01
2025-12-01
Brief Summary
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It is hypothesized that FES will promote motor recovery by supplying the missing normal muscle synergies to chronic stroke survivors at their supposed times of activations in each step cycle during interventional training. It is also expected that the walk synergies of the paretic side of chronic stroke survivors should be more similar to healthy muscle synergies at the two post-training time points than before training. The healthy normal muscle synergies will be defined by EMG recordings from the recruited healthy participants.
Detailed Description
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Among the many new post-stroke interventions, functional electrical stimulation (FES) of muscles remains attractive. FES is a neural-rehabilitative technology that communicates control signals from an external device to the neuromuscular system. There is increasing recognition that rehabilitation paradigms should promote restitution of the patient's muscle coordination towards the normal pattern during training, and FES can achieve this goal when stimulations are applied to the set of muscles whose natural coordination is impaired. For this reason, FES is a very promising interventional strategy. Existing FES paradigms, however, have yielded ambiguous results in previous clinical trials, especially those for chronic survivors, likely because either stimulation were applied only to single or a few muscles, or the stimulation pattern did not mimic the natural muscle coordination pattern during gait. A multi-muscle FES, when applied to a larger functional set of muscles and driven by their natural coordination pattern, can guide muscle activations towards the normal pattern through neuroplasticity, thus restore impairment at the level of muscle-activation deficit.
The aim of our project is to rehabilitate the gait of chronic stroke survivors by delivering stimulations to multiple muscles, in their natural coordination pattern, using our wearable. participants will utilize the theory of muscle synergy from motor neuroscience to guide our personalizable selections of muscles for FES. Muscle synergies are hypothesized neural modules of motor control that coordinate the spatiotemporal activation patterns of multiple muscles. Our customizable FES pattern for each stroke survivor will be constructed based on the normal muscle synergies - identified from age-matched healthy subjects - that are absent in the stroke survivor's muscle pattern during walking. Since muscle synergies represent the natural motor-control units used by the nervous system, reinforcement of their activations through FES should lead to a restoration of normal neuromuscular coordination, thus more natural post-training gait.
Conditions
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Study Design
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CASE_CONTROL
CROSS_SECTIONAL
Study Groups
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Healthy participants
Measurement of lower-limb muscle activation from healthy participants.
Measurement of muscle activation.
Measurement of lower-limb muscle activation during walking for healthy participants.
Chronic Stroke Survivors
Measurement of lower-limb muscle activation from chronic stroke survivors
Measurement of muscle activation.
Measurement of lower-limb muscle activation during walking for healthy participants.
Interventions
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Measurement of muscle activation.
Measurement of lower-limb muscle activation during walking for healthy participants.
Eligibility Criteria
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Inclusion Criteria
1. Right-handed elderly chronic stroke survivors; age ≥40; ≥6 months post-stroke
2. Unilateral ischemic brain lesions
3. Participants should be able to walk continuously for ≥15 min. with or without assistive aid
For healthy participants:
1. Healthy, right-handed subjects, age ≥40, free from any history of major neurological, musculoskeletal, and psychiatric disorders
2. Able to walk continuously for ≥20 min. without fatigue.
Exclusion Criteria
1. Cannot comprehend and follow instructions, or with a score \<21 on the mini-mental state exam;
2. Have cardiac pacemaker;
3. Have skin lesions at the locations where FES or EMG electrodes may be attached;
4. Have major depression;
5. Present with severe neglect
40 Years
85 Years
ALL
Yes
Sponsors
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The Hong Kong Polytechnic University
OTHER
City University of Hong Kong
OTHER
Shanghai Jiao Tong University School of Medicine
OTHER
Chinese University of Hong Kong
OTHER
Responsible Party
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Cheung Chi Kwan Vincent
Assistant Professor
Locations
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The Hong Kong Polytechnic University
Hong Kong, Hong Kong, Hong Kong
Countries
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References
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Krasovsky T, Levin MF. Review: toward a better understanding of coordination in healthy and poststroke gait. Neurorehabil Neural Repair. 2010 Mar-Apr;24(3):213-24. doi: 10.1177/1545968309348509. Epub 2009 Oct 12.
Peckham PH, Knutson JS. Functional electrical stimulation for neuromuscular applications. Annu Rev Biomed Eng. 2005;7:327-60. doi: 10.1146/annurev.bioeng.6.040803.140103.
Sheffler LR, Chae J. Neuromuscular electrical stimulation in neurorehabilitation. Muscle Nerve. 2007 May;35(5):562-90. doi: 10.1002/mus.20758.
Heller BW, Clarke AJ, Good TR, Healey TJ, Nair S, Pratt EJ, Reeves ML, van der Meulen JM, Barker AT. Automated setup of functional electrical stimulation for drop foot using a novel 64 channel prototype stimulator and electrode array: results from a gait-lab based study. Med Eng Phys. 2013 Jan;35(1):74-81. doi: 10.1016/j.medengphy.2012.03.012. Epub 2012 May 4.
Springer S, Vatine JJ, Wolf A, Laufer Y. The effects of dual-channel functional electrical stimulation on stance phase sagittal kinematics in patients with hemiparesis. J Electromyogr Kinesiol. 2013 Apr;23(2):476-82. doi: 10.1016/j.jelekin.2012.10.017. Epub 2012 Dec 8.
You G, Liang H, Yan T. Functional electrical stimulation early after stroke improves lower limb motor function and ability in activities of daily living. NeuroRehabilitation. 2014;35(3):381-9. doi: 10.3233/NRE-141129.
Zhuang C, Marquez J, Qu H, He X, Lan N (2015) A neuromuscular electrical stimulation strategy based on muscle synergy for stroke rehabilitation. 2015:816-819.
Ferrante S, Chia Bejarano N, Ambrosini E, Nardone A, Turcato AM, Monticone M, Ferrigno G, Pedrocchi A. A Personalized Multi-Channel FES Controller Based on Muscle Synergies to Support Gait Rehabilitation after Stroke. Front Neurosci. 2016 Sep 16;10:425. doi: 10.3389/fnins.2016.00425. eCollection 2016.
Barroso FO, Torricelli D, Molina-Rueda F, Alguacil-Diego IM, Cano-de-la-Cuerda R, Santos C, Moreno JC, Miangolarra-Page JC, Pons JL. Combining muscle synergies and biomechanical analysis to assess gait in stroke patients. J Biomech. 2017 Oct 3;63:98-103. doi: 10.1016/j.jbiomech.2017.08.006. Epub 2017 Aug 20.
Other Identifiers
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RIF_Healthy_version 01
Identifier Type: -
Identifier Source: org_study_id