Pre-movement parietal lobe input to human sensorimotor cortex

Robert T. Knight, Jaswinder Singh, David L Woods

Research output: Contribution to journalArticle

19 Scopus citations

Abstract

Movement-related cortical potentials (MRPs) were recorded in an auditory dichotic selective attention experiment in patients with focal lesions centered in either posterior superior temporal gyrus (temporal) or in lateral parietal cortex (parietal). Controls and temporal patients generated comparable pre-movement negative shifts (NSs) and motor potentials (MPs), onsetting about 400 ms prior to movement and maximal in amplitude over scalp sites contralateral to button press. Unilateral parietal cortex lesions markedly reduced the NSs but preserved the MP component of the MRP. The results indicate that human parietal association cortex exerts modulatory input to sensorimotor cortex, beginning at least 400 ms prior to movememt. The differential effect on the NSs and MPs by parietal lesions suggests that these MRP components may have independent intracranial generators.

Original languageEnglish (US)
Pages (from-to)190-194
Number of pages5
JournalBrain Research
Volume498
Issue number1
DOIs
StatePublished - Sep 25 1989

Keywords

  • Motor potential
  • Movement
  • Movement-related cortical potential
  • Parietal lobe
  • Sensorimotor

ASJC Scopus subject areas

  • Developmental Biology
  • Molecular Biology
  • Clinical Neurology
  • Neuroscience(all)

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