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Science 11 August 1995:
Vol. 269. no. 5225, pp. 853 - 855
DOI: 10.1126/science.7638604
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Articles

Science, Vol 269, Issue 5225, 853-855
Copyright © 1995 by American Association for the Advancement of Science

articles

Parietal contributions to visual feature binding: evidence from a patient with bilateral lesions

Friedman-Hill SR, LC Robertson, and A Treisman

Center for Neuroscience, University of California, Davis 95616, USA.

Neurophysiologists have documented the existence of multiple cortical areas responsive to different visual features. This modular organization has sparked theoretical interest in how the "binding problem" is solved. Recent data from a neurological patient (R.M.) with bilateral parietal-occipital lesions demonstrates that the binding problem is not just a hypothetical construct; it can be a practical problem, as rare as the selective inability to perceive motion or color. R.M. miscombines colors and shapes even under free viewing conditions and is unable to judge either relative or absolute visual locations. The evidence suggests that a single explanation--an inadequate spatial representation--can account for R.M.'s spatial judgment and feature-binding deficits.


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