Cortical motor areas in plantar response: An event-related functional magnetic resonance imaging study in normal subjects

Kenichi Oishi, Keiichiro Toma, Kayako Matsuo, Toshiharu Nakai, Kazuo Chihara, Hidenao Fukuyama

Research output: Contribution to journalArticlepeer-review

Abstract

The role of the cerebral cortices in normal plantar response was investigated with event-related functional magnetic resonance imaging (fMRI) at 3 Tesla in 12 right-handed normal subjects. During fMRI acquisition, the lateral (LS) and medial (MS) side of the left sole was mechanically stimulated every 16 s to evoke the plantar response under monitoring of the surface electromyogram. LS activated the contralateral supplementary motor area (SMA) more intensively than MS. In contrast, no difference was found in the commonly activated areas including the contralateral primary sensorimotor area, bilateral secondary sensory areas and the thalamus. The results support the hypothesis that the normal plantar response is influenced by the cerebral cortices, and that the SMA likely participates in the regulation of the plantar reflex arc at the spinal level.

Original languageEnglish (US)
Pages (from-to)17-20
Number of pages4
JournalNeuroscience Letters
Volume345
Issue number1
DOIs
StatePublished - Jul 10 2003
Externally publishedYes

Keywords

  • Babinski sign
  • Brain activation
  • Cortical reflex arc
  • Event-related functional magnetic resonance imaging
  • Plantar response
  • Plantar stimulation
  • Supplementary motor area

ASJC Scopus subject areas

  • Neuroscience(all)

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