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A network of areas for 3-D shape processing in the anesthetized monkey

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http://pubman.mpdl.mpg.de/cone/persons/resource/persons84209

Sereno,  MA
Department Physiology of Cognitive Processes, Max Planck Institute for Biological Cybernetics, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons83787

Augath,  M
Department Physiology of Cognitive Processes, Max Planck Institute for Biological Cybernetics, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons84262

Trinath,  T
Department Physiology of Cognitive Processes, Max Planck Institute for Biological Cybernetics, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons84063

Logothetis,  NK
Department Physiology of Cognitive Processes, Max Planck Institute for Biological Cybernetics, Max Planck Society;

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Sereno, M., Augath, M., Trinath, T., & Logothetis, N. (2001). A network of areas for 3-D shape processing in the anesthetized monkey. Talk presented at 31st Annual Meeting of the Society for Neuroscience (Neuroscience 2001). San Diego, CA, USA.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0013-E1E4-0
Abstract
Using fMRI in anesthetized monkeys and a variety of computer-generated 3-D objects defined by shading, random dots, texture elements, or silhouettes and presented either statically or dynamically (rotating), we have previously identified 3-D shape-specific areas in occipital (areas VP and V3) and temporal (areas MT and FST; mid-to-anterior STS; and the AMTS) cortices (Sereno et al., Soc. Neurosci. Abstr., 26, 498.11, 2000). The present study investigates representation of 3-D shape from motion parallax using dynamic random dots in brain regions beyond the occipital and temporal lobes. Control stimuli consist of constructed objects with scrambled motion gradients. Such stimuli contain the same local motion information as the original objects, but the disruption of the cue gradient across the image diminishes an impression of depth. Spatially resolved BOLD contrast-based functional images of monkey visual cortex were obtained using a high-field (4.7 T) scanner and multi-shot, multi-slice, gradient-recalled, echo-planar imaging (EPI) sequences (voxel size, 1 x1 x 2 mm). Results showed significant activation in previously identified shape-specific regions of occipital and temporal lobes but also several areas in the intraparietal sulcus and two frontal lobe regions (the FEF and ventrolateral prefrontal cortex). This distributed network of areas cuts across both ventral and dorsal processing streams, reflecting multiple uses for 3-D shape representation in perception, recognition, and action.