Functional magnetic resonance image finding of cortical activation by neuromuscular electrical stimulation on wrist extensor muscles.

Abstract:

OBJECTIVE:To investigate the effects that neuromuscular electrical stimulation on the wrist extensor muscles have on the cerebral cortex. DESIGN:A functional magnetic resonance imaging study was performed on eight normal volunteers. The activation task was the maximum wrist extension by neuromuscular electrical stimulation, applied through a two-channel electrical stimulator. Monophasic square-wave pulses were used. The activation maps were generated by the threshold test maps. The level of primary motor cortex and primary sensory cortex activations was estimated. RESULTS:Among the eight subjects, seven showed significant activation on contralateral primary sensorimotor cortex by neuromuscular electrical stimulation on the wrist extensor muscles. In these seven subjects, additional bilateral or contralateral supplementary motor area activations were also observed. The number of activated pixels on the primary sensory cortex was slightly greater than that on the primary motor cortex. CONCLUSION:Neuromuscular electrical stimulation, when applied to the peripheral muscles, seems to have a direct effect on the cerebral cortex.

journal_name

Am J Phys Med Rehabil

authors

Han BS,Jang SH,Chang Y,Byun WM,Lim SK,Kang DS

doi

10.1097/00002060-200301000-00003

subject

Has Abstract

pub_date

2003-01-01 00:00:00

pages

17-20

issue

1

eissn

0894-9115

issn

1537-7385

pii

00002060-200301000-00003

journal_volume

82

pub_type

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