Somatosensory evoked potentials after removal of somatosensory cortex in man

Electroencephalogr Clin Neurophysiol. 1986 Mar;65(2):111-7. doi: 10.1016/0168-5597(86)90043-2.


Somatosensory evoked potentials (SEPs) to median nerve, ulnar nerve, thumb, middle finger, and posterior tibial nerve stimulation were recorded in a patient with a discrete resection of part of the postcentral somatosensory cortex as a treatment for focal epilepsy. Comparison of the different stimulation sites confirmed electrophysiologically the restricted locus of the lesion. The results strongly suggest that the early negative component (N20) and subsequent components recorded postcentrally are of cortical origin and depend upon postcentral gyrus cytoarchitectonic areas 3, 2, and 1. Moreover, these postcentral SEPs are distinct from precentrally recorded activity.

Publication types

  • Case Reports

MeSH terms

  • Adult
  • Cerebral Cortex / physiology*
  • Electroencephalography
  • Evoked Potentials, Somatosensory*
  • Humans
  • Male
  • Neural Pathways / physiology
  • Peripheral Nerves / physiology
  • Somatosensory Cortex / surgery*