Electromyography-Triggered Constraint-Induced Movement Cycling Therapy for Enhancing Motor Function in Chronic Stroke...

Area of Science:

• Neurorehabilitation
• Biomedical Engineering
• Physical Therapy

Background:

• Chronic stroke frequently leads to hemiplegia, impacting motor function, balance, and independence.
• Traditional rehabilitation methods may not fully restore lost function in patients with chronic stroke.
• Novel therapeutic approaches are needed to enhance recovery outcomes.

Purpose of the Study:

• To investigate the efficacy of surface electromyography (sEMG)-triggered constraint-induced movement cycling therapy (CIMCT) compared to general cycling training (GCT).
• To assess the impact of CIMCT on lower extremity strength, balance, and activities of daily living in chronic stroke survivors.

Main Methods:

• A single-blind randomized controlled trial involving patients with chronic stroke-induced hemiplegia.
• Participants were assigned to either an sEMG-triggered CIMCT group (n=20) or a GCT group (n=19) for 4 weeks.
• Outcome measures included manual muscle testing, Timed Up and Go (TUG), Berg Balance Scale (BBS), Functional Reach Test (FRT), and modified Barthel index (MBI).

Main Results:

• The CIMCT group showed significant improvements in affected side muscle strength (large effect size, d=1.86) compared to the GCT group.
• Both groups improved dynamic balance (TUG) and static balance (BBS, FRT), with superior outcomes in the CIMCT group (large effect sizes, d=0.96-1.25).
• Activities of daily living (MBI) improved significantly in both groups, with a substantial enhancement in the CIMCT group (large effect size, d=0.87).

Conclusions:

• sEMG-triggered CIMCT is an effective intervention for improving muscle strength in chronic stroke patients.
• CIMCT demonstrates superior efficacy in enhancing balance and functional independence compared to GCT.
• This therapy offers a promising approach to neurorehabilitation for improving outcomes in chronic stroke survivors.