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Long-Lasting Contralateral Motor Cortex Excitability is Increased by Unilateral Hand Movement That Triggers Electrical Stimulation of Opposite Homologous Muscles
Citation
Schmidt, MW and Hinder, MR and Summers, JJ and Garry, MI, Long-Lasting Contralateral Motor Cortex Excitability is Increased by Unilateral Hand Movement That Triggers Electrical Stimulation of Opposite Homologous Muscles, Neurorehabilitation and Neuro Repair, 25, (6) pp. 521-530. ISSN 1545-9683 (2011) [Refereed Article]
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Copyright Statement
Copyright 2011 American Society of Neurorehabilitation
DOI: doi:10.1177/1545968310397202
Abstract
Background/objective. Long-term changes in the motor cortex can be induced by practicing motor tasks with simultaneous
application of peripheral nerve stimulation. This combination may augment motor rehabilitation after stroke but has been
used primarily during contraction of the affected hand. The authors tested the effect of a right hand movement that electrically
stimulated left hand contraction on right motor cortex excitability. Methods. Three tasks were used in 15 healthy subjects—a
motor and stimulation task (MStask), stimulation only task (Stask), and motor only task (Mtask). The MStask consisted of isometric
thumb abduction of the right hand that triggered paired electrical stimulation of the left abductor pollicis brevis (APB) and
first dorsal interosseus (FDI) motor points. The Stask was performed 1 week later and matched the stimulation received in
the MStask. The Mtask was performed as a control. Transcranial magnetic stimulation applied to the right motor cortex assessed
corticospinal excitability, short latency intracortical inhibition, and intracortical facilitation of the FDI and APB before, immediately
after, and 30 minutes after task performance. Results. Corticospinal excitability increased in the FDI and APB following
the MStask but not following the Stask or Mtask. The increased excitability present 30 minutes after the MStask also correlated
with excitability measures recorded 1 week later. Conclusion. A bilateral motor and electrical stimulation task can drive persistent
adaptation within the corticospinal system. Hemiplegic subjects who have poor voluntary movement of the affected
hand may be able to contract the unaffected hand to activate and train homologous movements.
Item Details
Item Type: | Refereed Article |
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Keywords: | motor cortex, plasticity, transcranial magnetic stimulation (TMS), attention |
Research Division: | Psychology |
Research Group: | Cognitive and computational psychology |
Research Field: | Sensory processes, perception and performance |
Objective Division: | Expanding Knowledge |
Objective Group: | Expanding knowledge |
Objective Field: | Expanding knowledge in the health sciences |
UTAS Author: | Schmidt, MW (Mr Matthew Schmidt) |
UTAS Author: | Hinder, MR (Associate Professor Mark Hinder) |
UTAS Author: | Summers, JJ (Professor Jeffery Summers) |
UTAS Author: | Garry, MI (Associate Professor Michael Garry) |
ID Code: | 74840 |
Year Published: | 2011 |
Web of Science® Times Cited: | 11 |
Deposited By: | Psychology |
Deposited On: | 2011-12-14 |
Last Modified: | 2017-11-05 |
Downloads: | 0 |
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