Activation of human mesial cortex during somatosensory target detection task

Brain Res. 1996 Sep 23;734(1-2):229-35.

Abstract

We recorded somatosensory evoked fields (SEFs) from 10 healthy subjects to ulnar and median nerve stimuli presented at random intervals of 2.4-21.6 s. The subjects either counted the stimuli or ignored them by reading a book. The stimuli activated in both conditions the contralateral SI cortex, the ipsi- and contralateral SII cortices, and the posterior parietal cortex (PPC), in line with earlier observations. In addition, a novel response was observed in nine subjects at 120-160 ms. It was clearly enhanced by attention and was generated in the mesial cortex of the paracentral lobule, close to the end of the central sulcus.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Acoustic Stimulation
  • Adult
  • Attention / physiology
  • Cerebral Cortex / anatomy & histology
  • Cerebral Cortex / physiology*
  • Electric Stimulation
  • Evoked Potentials, Somatosensory*
  • Female
  • Humans
  • Magnetic Resonance Imaging
  • Magnetoencephalography
  • Male
  • Median Nerve / physiology
  • Middle Aged
  • Ulnar Nerve / physiology