J. Cogn. Neurosci.
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(Journal of Cognitive Neuroscience. 2004;16:665-682.)
© 2004 The MIT Press

Attention to 3-D Shape, 3-D Motion, and Texture in 3-D Structure from Motion Displays

Hendrik Peuskens

K.U.Leuven Medical School

Kristl G. Claeys

K.U.Leuven
University of Antwerpen

James T. Todd

The Ohio State University

J. Farley Norman

Western Kentucky University

Paul Van Hecke

UZ Gasthuisberg

Guy A. Orban

K.U.Leuven

We used fMRI to directly compare the neural substrates of three-dimensional (3-D) shape and motion processing for realistic textured objects rotating in depth. Subjects made judgments about several different attributes of these objects, including 3-D shape, the 3-D motion, and the scale of surface texture. For all of these tasks, we equated visual input, motor output, and task difficulty, and we controlled for differences in spatial attention. Judgments about 3-D shape from motion involve both parietal and occipito-temporal regions. The processing of 3-D shape is associated with the analysis of 3-D motion in parietal regions and the analysis of surface texture in occipito-temporal regions, which is consistent with the different behavioral roles that are typically attributed to the dorsal and ventral processing streams.


Key Words: 3-D structure from motion • discrimination • extrastriate cortex • humans • functional imaging • two visual pathways




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