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

Bong Soo Han, Sung Ho Jang, Yongmin Chang, Woo Mok Byun, Seung Kwan Lim, Duk Sik Kang

Research output: Contribution to journalArticlepeer-review

66 Scopus citations

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 t 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.

Original languageEnglish
Pages (from-to)17-20
Number of pages4
JournalAmerican Journal of Physical Medicine and Rehabilitation
Volume82
Issue number1
DOIs
StatePublished - 1 Jan 2003

Keywords

  • Cortical activation
  • Electric stimulation
  • Functional magnetic resonance imaging

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