Journal
JOURNAL OF REHABILITATION RESEARCH AND DEVELOPMENT
Volume 51, Issue 2, Pages 213-227Publisher
JOURNAL REHAB RES & DEV
DOI: 10.1682/JRRD.2013.02.0050
Keywords
anklebot; ankle robotics; chronic hemiparetic stroke; cognitive motor learning; EEG; EEG coherence; EEG spectral power; gait; plasticity; reward
Categories
Funding
- VA Rehabilitation Research and Development Service (CDA-1 grant) [A7251M]
- pilot grant from the VA Maryland Exercise and Robotics Center of Excellence
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Robotics is rapidly emerging as a viable approach to enhance motor recovery after disabling stroke. Current principles of cognitive motor learning recognize a positive relationship between reward and motor learning. Yet no prior studies have established explicitly whether reward improves the rate or efficacy of robotics-assisted rehabilitation or produces neurophysiologic adaptations associated with motor learning. We conducted a 3 wk, 9-session clinical pilot with 10 people with chronic hemiparetic stroke, randomly assigned to train with an impedance-controlled ankle robot (anklebot) under either high reward (HR) or low reward conditions. The 1 h training sessions entailed playing a seated video game by moving the paretic ankle to hit moving onscreen targets with the anklebot only providing assistance as needed. Assessments included paretic ankle motor control, learning curves, electroencephalograpy (EEG) coherence and spectral power during unassisted trials, and gait function. While both groups exhibited changes in EEG, the HR group had faster learning curves (p = 0.05), smoother movements (p
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