Changes in hemiplegic grasp following distributed repetitive intervention: a case series

Area of Science:

• Neuroscience
• Rehabilitation Medicine
• Physical Therapy

Background:

• Stroke often results in chronic hemiplegia, leading to limited hand recovery and functional deficits.
• Repetitive task-specific training is a cornerstone of neurorehabilitation, but optimal delivery models require further investigation.
• Understanding the impact of distributed practice on motor recovery is crucial for optimizing therapeutic interventions.

Purpose of the Study:

• To investigate the efficacy of a distributed model of repetitive and focused intervention for improving hand function in chronic hemiplegia.
• To assess the impact of this intervention on grasp force, clinical measures, and functional hand abilities.
• To evaluate the retention of improvements following the intervention period.

Main Methods:

• A case series pilot study design was employed.
• Three participants with chronic upper limb hemiplegia received focused, repetitive unilateral and bilateral hand interventions over 6 weeks, three times weekly.
• Instrumented grasp force, clinical assessments, and functional measures were collected at baseline, mid-intervention, and post-intervention, including a 3-week follow-up.

Main Results:

• All participants demonstrated improvement in at least one grasp force measure.
• Clinical skills and functional hand use improved across all participants.
• Handwriting quality significantly improved, and these gains were sustained above baseline after a 3-week detraining period.

Conclusions:

• Distributed repetitive practice appears sufficient to induce positive changes in hand function for individuals with chronic hemiplegia.
• The observed improvements align with evidence suggesting adaptive cortical plasticity following intensive, repeated motor practice.
• Larger controlled studies are recommended to confirm these findings and explore the effectiveness of specific intervention components.