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Hemispheric antagonism in visuo-spatial neglect: A case study

Published online by Cambridge University Press:  26 February 2009

John C. Marshall  and
Peter W. Halligan
John C. Marshall
Affiliation:
University Department of Clinical Neurology, The Radeliffe Infirmary, Oxford, U.K.
Peter W. Halligan
Affiliation:
Rivermead Rehabilitation Centre, Oxford, U.K.
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Abstract

We report a case of severe visuo-spatial neglect consequent upon right-hemisphere stroke. At the time of testing, the patient had no visual field cut and no significant hemiparesis. Conventional testing on cancellation tasks with the right hand revealed reliable left neglect, but performance was significantly improved when the left hand was used. Investigations of (manual) line bisection showed normal performance with the right hand but right neglect when the left hand was used. Right neglect was also observed on a purely perceptual version of the line bisection task. We argue that the attentional vectors of the cerebral hemispheres can be modulated by (perceptual) task-demands and by (motorie) response demands. (JINS, 1996, 2, 412–418.)

Keywords

Visuo-spatial neglectCancellation and line bisectionLaterality of manual response
Type
Thematic Articles
Information
Journal of the International Neuropsychological Society , Volume 2 , Issue 5 , September 1996 , pp. 412 - 418
Copyright
Copyright © The International Neuropsychological Society 1996

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