Ipsilateral hemisphere activation during motor and sensory tasks

Andrew Li, F. Zerrin Yetkin, Robert Cox, Victor M. Haughton

Research output: Contribution to journalArticlepeer-review

86 Scopus citations


PURPOSE: To compare activation of the ipsilateral cerebral hemisphere during tactile sensory and motor tasks involving the right and left hands. METHODS: Eight volunteers had functional MR imaging to measure the extent of cerebral hemisphere activation during a motor task and a sensory task involving each hand. Hemispheric indexes (left hemisphere activation minus right hemisphere activation)/(left hemisphere activation plus right hemisphere activation) were computed for each hand and each task. The indexes for the two tasks and the two hands were compared. RESULTS: The left-hand motor tasks activated the ipsilateral hemisphere in right handers significantly more than did the right-hand tasks. Motor tasks produced a greater activation of the ipsilateral hemisphere than did the sensory tasks. No significant differences were found between the hemispheric indexes for the right-hand and left-hand sensory tasks. CONCLUSION: This study confirms findings of a previous study, showing that the left hemisphere is active in left-hand motor tasks. Activation of the ipsilateral hemisphere is significantly less pronounced during sensory tasks than during motor tasks.

Original languageEnglish (US)
Pages (from-to)651-655
Number of pages5
JournalAmerican Journal of Neuroradiology
Issue number4
StatePublished - Apr 1 1996


  • Brain, magnetic resonance
  • Magnetic resonance, functional
  • Movement

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Clinical Neurology


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