Distinct syndromes of hemineglect

J. Binder, R. Marshall, R. Lazar, J. Benjamin and J. P. Mohr
Department of Neurology, Columbia Presbyterian Medical Center, New York, NY.

Hemineglect was assessed in 34 patients with right-hemisphere stroke using a letter-cancellation task and a line bisection task. No significant correlation (r = .39) was found between scores on the two tests. Ten patients who showed neglect on the cancellation task but performed normally on line bisection had frontal or deep lesions. Eleven patients with posterior lesions deviated rightward on line bisection; several of these had minimal or no cancellation deficit. A nonmotor task involving judgment of a bisected line was also performed abnormally by six patients with line bisection shift, suggesting that such shift does not result from a motor response asymmetry. We propose that separable components of the neglect syndrome may be associated with damage to discrete areas of the nondominant hemisphere.

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