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Science 31 October 2003:
Vol. 302. no. 5646, pp. 789 - 791
DOI: 10.1126/science.1091065
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Perspectives

NEUROSCIENCE:
Illusions and Perceived Images in the Primate Brain

Ulf T. Eysel

A question that has puzzled neuroscientists for more than 100 years is how the brain represents a real stimulus versus its perceived illusion. In his Perspective, Eysel discusses new work in monkeys and humans (Chen et al., Whitney et al.) showing that illusory representations of tactile and visual stimuli in the primary sensory cortex depend on the type of stimulus and how it is presented.

The author is in the Department of Neurophysiology, Ruhr-University-Bochum, Bochum 44780, Germany. E-mail: eysel{at}rub.de

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Science. ISSN 0036-8075 (print), 1095-9203 (online)