Journal
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
Volume 114, Issue 49, Pages 13024-13029Publisher
NATL ACAD SCIENCES
DOI: 10.1073/pnas.1614452114
Keywords
binocular disparity; population coding; V2; optical imaging; monkey
Categories
Funding
- National Natural Science Foundation [31471052, 31371111, 31530029, 31625012, 81430010, 31627802]
- Fundamental Research Funds for the Central Universities [2015QN81007]
- Zhejiang Provincial Natural Science Foundation of China [LR15C090001]
- NIH [EY11744]
- National Hi-Tech Research and Development Program [2015AA020515]
- Vanderbilt University Vision Research Center, Center for Integrative & Cognitive Neuroscience
- Institute of Imaging Science
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Stereoscopic vision depends on correct matching of corresponding features between the two eyes. It is unclear where the brain solves this binocular correspondence problem. Although our visual system is able to make correct global matches, there are many possible false matches between any two images. Here, we use optical imaging data of binocular disparity response in the visual cortex of awake and anesthetized monkeys to demonstrate that the second visual cortical area (V2) is the first cortical stage that correctly discards false matches and robustly encodes correct matches. Our findings indicate that a key transformation for achieving depth perception lies in early stages of extrastriate visual cortex and is achieved by population coding.
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