ERP and RT signs of a rightward bias for spatial orienting in a split-brain patient

A. M. Proverbio, A. Zani, M. S. Gazzaniga, George R Mangun

Research output: Contribution to journalArticle

33 Scopus citations

Abstract

Neuropsychological data have shown that the two cerebral hemispheres differ in the control of spatial attention. The present study investigated hemispheric asymmetries and visuomotor integration in a split-brain patient and three control subjects. Simple reaction times (RTs) and event-related potentials (ERPs) were recorded to lateralized stimuli presented at different eccentricities in the left and right visual hemifields. Both electrophysiological and behavioural data showed that, unlike controls, the split-brain patient showed a strong rightward attentional bias resulting in shorter RTs and larger P300 potentials to stimuli falling in the rightmost space. Furthermore, ERPs also showed that while the RH has a bilateral control of visual space, the LH spatial orienting capability is most restricted to the contralateral hemifield.

Original languageEnglish (US)
Pages (from-to)2457-2461
Number of pages5
JournalNeuroReport
Volume5
Issue number18
StatePublished - 1994

Keywords

  • Cerebral hemispheres
  • Event-related potentials
  • Human split-brain
  • P300 component
  • Right hemisphere bilateral control over attention to space
  • Rightward bias in spatial orienting
  • RTS
  • Spatial attention

ASJC Scopus subject areas

  • Neuroscience(all)

Fingerprint Dive into the research topics of 'ERP and RT signs of a rightward bias for spatial orienting in a split-brain patient'. Together they form a unique fingerprint.

  • Cite this

    Proverbio, A. M., Zani, A., Gazzaniga, M. S., & Mangun, G. R. (1994). ERP and RT signs of a rightward bias for spatial orienting in a split-brain patient. NeuroReport, 5(18), 2457-2461.