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Upper extremity improvements in chronic stroke: coupled bilateral load training.

James H Cauraugh¹, Stephen A Coombes, Neha Lodha

¹Motor Behavior Laboratory, Applied Physiology and Kinesiology Department, University of Florida, Gainesville, FL 32611, USA. jcaura@hhp.ufl.edu

Restorative Neurology and Neuroscience

|January 24, 2009

Summary

Coupled bilateral training, with or without added load, improved upper extremity motor recovery in chronic stroke patients. Adding a load to the unimpaired arm enhanced reaction times, suggesting better neural activation.

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Area of Science:

Neurorehabilitation
Motor Recovery
Stroke Rehabilitation

Background:

Chronic stroke impairs upper extremity motor function.
Current rehabilitation strategies aim to improve motor recovery.
Coupled bilateral training (CBT) involves simultaneous limb movements and EMG-triggered neuromuscular stimulation.

Purpose of the Study:

To investigate the effects of CBT with and without resistive load on upper extremity motor recovery in chronic stroke survivors.
To determine if adding a load to the unimpaired limb influences motor recovery outcomes.

Main Methods:

Thirty chronic stroke subjects participated in the study.
Participants were randomly assigned to three groups: CBT with load, CBT without load, or control.
Rehabilitation consisted of 6 hours over 4 days.

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Main Results:

Both CBT groups showed significant improvements in motor capabilities compared to the control group.
Participants in CBT groups moved more blocks and demonstrated increased regularity in sustained contractions.
The CBT with load group exhibited faster motor reaction times.

Conclusions:

Coupled bilateral training contributes to improved motor capabilities in the impaired arm after stroke.
Adding a load to the unimpaired arm during CBT may enhance motor recovery by stabilizing the neuromuscular system.
These findings suggest that CBT promotes balanced interhemispheric interactions, beneficial for stroke rehabilitation.