Cognitive Neuroscience And NeuropsychologyDisparity tuning in macaque area V4Hinkle, David A.; Connor, Charles E.CAAuthor Information Department of Neuroscience, Johns Hopkins University School of Medicine and Zanvyl Krieger Mind/Brain Institute, 338 Krieger Hall, 3400 N Charles Street, Johns Hopkins University, Baltimore MD 21218, USA CACorresponding Author Received 8 November 2000; accepted 22 November 2000 Neuroreport: February 12, 2001 - Volume 12 - Issue 2 - p 365-369 Buy Abstract Neural processing of stereoscopic depth is conventionally associated with the dorsal (spatial) pathway in primate visual cortex. The role of depth information in the ventral (object) pathway has been less certain. We found prominent tuning for stereoscopic disparity in area V4, an intermediate stage in the ventral pathway. Eighty percent of the cells in our sample exhibited significant disparity tuning over the −1.0° to 1.0° range, and the majority showed > 2:1 response differences. Tuning function shapes were similar to those reported previously in other visual areas. We observed a significant tuning bias towards crossed (near) disparities. This could reflect an emphasis in the ventral pathway on foreground objects or parts of objects projecting towards the viewer. © 2001 Lippincott Williams & Wilkins, Inc.