Action Observation Combined With Virtual Reality Promotes Motor Recovery After Stroke: A Randomized Controlled Trial

Area of Science:

• Neurorehabilitation
• Stroke Recovery
• Virtual Reality in Medicine

Background:

• Upper limb rehabilitation post-stroke often utilizes action observation and virtual reality (VR).
• The efficacy of combining action observation with VR for improving hand dexterity and motor recovery after stroke requires further investigation.

Purpose of the Study:

• To compare the effectiveness of combined action observation and VR versus VR alone for upper limb rehabilitation in post-stroke individuals with hemiplegia.

Main Methods:

• A multicenter, assessor-blinded randomized controlled trial involved 48 post-stroke adults with hemiplegia.
• Participants received 20 one-hour sessions over 5 weeks.
• The experimental group combined action observation with VR tasks, while the control group performed VR tasks without action observation.

Main Results:

• The experimental group showed significantly greater improvement in paretic hand function (Box and Block Test scores) compared to the control group at post-treatment and 6-month follow-up.
• Improvements in non-paretic hand function and secondary outcomes like muscle strength and functional independence were similar between groups.
• Treatment effects on paretic hand dexterity varied based on age and time from stroke.

Conclusions:

• Action observation combined with VR is more effective than VR alone for enhancing upper limb motor recovery after stroke.
• This combined approach particularly benefits fine motor function in the paretic hand.
• The findings support the integration of action observation into VR-based rehabilitation strategies for stroke patients.