J. Cogn. Neurosci.
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The Journal of Cognitive Neuroscience, Vol 10, 704-716, Copyright © 1998 by The MIT Press

ARTICLES

Effects of Parietal Lesions in Humans on Color and Location Priming

Paola Marangolo, Enrico Di Pace, Robert Rafal and Donatella Scabini

To determine whether the parietal lobes contribute to the selection of nonspatial features known to be processed in the ventral stream, the current study examined the effect of chronic unilateral parietal lobe lesions in humans on color and location priming. Patients and normal controls performed a go/no-go color discrimination task in which either the same color and different color pairs of stimuli (prime and probe) were projected sequentially either in the same hemifield or in opposite hemifields. Control subjects and patients both showed independent effects of color and location priming. In the patients, primes in either field produced color priming for target probes in the ipsilesional field but not for probes in the contralesional field. This observation implicates the parietal cortex in processing activated codes of stimulus attributes not only for spatial information but also for visual features processed in the ventral visual pathways.


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NEURAL COMPUTATION J COGNITIVE NEUROSCIENCE MIT PRESS JOURNALS
Copyright © 1998 by The MIT Press.