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Published July 31, 2003 | Submitted + Supplemental Material
Journal Article Open

Stereopsis Activates V3A and Caudal Intraparietal Areas in Macaques and Humans


Stereopsis, the perception of depth from small differences between the images in the two eyes, provides a rich model for investigating the cortical construction of surfaces and space. Although disparity-tuned cells have been found in a large number of areas in macaque visual cortex, stereoscopic processing in these areas has never been systematically compared using the same stimuli and analysis methods. In order to examine the global architecture of stereoscopic processing in primate visual cortex, we studied fMRI activity in alert, fixating human and macaque subjects. In macaques, we found strongest activation to near/far compared to zero disparity in areas V3, V3A, and CIPS. In humans, we found strongest activation to the same stimuli in areas V3A, V7, the V4d topolog (V4d-topo), and a caudal parietal disparity region (CPDR). Thus, in both primate species a small cluster of areas at the parieto-occipital junction appears to be specialized for stereopsis.

Additional Information

© 2003 by Cell Press. Under an Elsevier user license. Received 30 July 2002, Revised 5 June 2003, Accepted 3 July 2003, Available online 2 August 2003. We are grateful to Egon Pasztor for building the barrel chair and to Doug Greve, Bruce Fischl, Rick Hoge, Don Rogers, Mike Lafratta, Koen Nelissen, and Katrien Denys for technical support. Greg DeAngelis, James Lewis, David Hubel, Bevil Conway, Winrich Freiwald, and Robert Savoy provided helpful discussions and comments on the manuscript. This work was supported by grants from the MIND Institute, NIH (1RO1MH67529), BRP (1RO1EB00790), the Queen Elisabeth Foundation (GSKE), NFWO (G3106.94 and G0112.00), GOA (95/6 and 2000/11), and IUAP (4/22).

Attached Files

Submitted - Tsao_manuscript2.docx.pdf

Supplemental Material - 1-s2.0-S0896627303004598-mmc1.jpg

Supplemental Material - 1-s2.0-S0896627303004598-mmc2.jpg

Supplemental Material - 1-s2.0-S0896627303004598-mmc3.jpg

Supplemental Material - 1-s2.0-S0896627303004598-mmc4.jpg

Supplemental Material - 1-s2.0-S0896627303004598-mmc5.jpg

Supplemental Material - 1-s2.0-S0896627303004598-mmc6.jpg

Supplemental Material - 1-s2.0-S0896627303004598-mmc7.doc


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