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4.69

Journal of Cognitive Neuroscience

January 1997, Vol. 9, No. 1, Pages 133-142
(doi: 10.1162/jocn.1997.9.1.133)
© 1997 by the Massachusetts Institute of Technology
A Locus in Human Extrastriate Cortex for Visual Shape Analysis
Article PDF (2.71 MB)
Abstract

Positron emission tomography (PET) was used to locate an area in human extrastriate cortex that subserves a specific component process of visual object recognition. Regional blood flow increased in a bilateral extrastriate area on the inferolateral surface of the brain near the border between the occipital and temporal lobes (and a smaller area in the right fusiform gyms) when subjects viewed line drawings of 3-dimensional objects compared to viewing scrambled drawings with no clear shape interpretation. Responses were Seen for both novel and familiar objects, implicating this area in the bottom-up (i.e., memory-independent) analysis of visual shape.