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- W2137989076 abstract "The ventral form vision pathway of the primate brain comprises a sequence of areas that include V1, V2, V4 and the inferior temporal cortex (IT) [1]. Although contour extraction in the V1 area and responses to complex images, such as faces, in the IT have been studied extensively, much less is known about shape extraction at intermediate cortical levels such as V4. Here, we used functional magnetic resonance imaging (fMRI) to demonstrate that the human V4 is more strongly activated by concentric and radial patterns than by conventional sinusoidal gratings. This is consistent with global pooling of local V1 orientations to extract concentric and radial shape information in V4. Furthermore, concentric patterns were found to be effective in activating the fusiform face area. These findings support recent psychophysical [2,3] and physiological [4,5] data indicating that analysis of concentric and radial structure represents an important aspect of processing at intermediate levels of form vision." @default.
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- W2137989076 date "2000-11-01" @default.
- W2137989076 modified "2023-09-27" @default.
- W2137989076 title "An fMRI study of the selective activation of human extrastriate form vision areas by radial and concentric gratings" @default.
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- W2137989076 doi "https://doi.org/10.1016/s0960-9822(00)00800-9" @default.
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