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Brain, Vol. 113, No. 1, 191-205, 1990
© 1990 Oxford University Press

research-article

PERIPERSONAL AND VERTICAL NEGLECT

PAUL A. SHELTON, DAWN BOWERS and KENNETH M. HEILMAN

Department of Neurology, Veterans Administration Medical Center and University of Florida College of Medicine Gainesville, Florida, USA

Correspondence to: Correspondence to: Dr Paul A. Shelton, Section of Neurology, University of Manitoba, Clinical Neurophysiology Laboratory, St Boniface Hospital, 409 Taché Avenue, Winnipeg, Manitoba, Canada R2H 2A6 (Present address).

When bisecting radial lines visually, normal subjects err towards distant peripersonal space, and when bisecting vertical lines visually, they err towards upper vertical space. In contrast, when bisecting lines under tactile-proprioceptive guidance, subjects err towards near peripersonal space, suggesting that normally attention is preferentially distributed away from the body during visual exploration but distributed towards the body during tactile exploration. A patient with ischacmic lesions, however, involving both inferior temporal lobes neglected far peripersonal and upper vertical space. He also demonstrated a motor bias away from the neglected space. These findings suggest that in man attention is spatially directed in threeorthogonal axes (horizontal, vertical and radial), that attention may normally be unequally distributed in each of these axes, and that neglect may occur in not only the horizontal axis but also in the radial and vertical axes.

Received October 5, 1988. Revised April 18, 1989. Accepted April 26, 1989.


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