Article abstract
Nature Neuroscience 11, 1352 - 1360 (2008)
Published online: 5 October 2008 | Corrected online: 12 October 2008 | doi:10.1038/nn.2202
A neural code for three-dimensional object shape in macaque inferotemporal cortex
Yukako Yamane1, Eric T Carlson1,2, Katherine C Bowman1,3, Zhihong Wang1 & Charles E Connor1,3
Abstract
Previous investigations of the neural code for complex object shape have focused on two-dimensional pattern representation. This may be the primary mode for object vision given its simplicity and direct relation to the retinal image. In contrast, three-dimensional shape representation requires higher-dimensional coding derived from extensive computation. We found evidence for an explicit neural code for complex three-dimensional object shape. We used an evolutionary stimulus strategy and linear/nonlinear response models to characterize three-dimensional shape responses in macaque monkey inferotemporal cortex (IT). We found widespread tuning for three-dimensional spatial configurations of surface fragments characterized by their three-dimensional orientations and joint principal curvatures. Configural representation of three-dimensional shape could provide specific knowledge of object structure to support guidance of complex physical interactions and evaluation of object functionality and utility.
- Zanvyl Krieger Mind/Brain Institute, Johns Hopkins University, 3400 N. Charles Street, Baltimore, Maryland 21218, USA.
- Department of Biomedical Engineering, Johns Hopkins University, School of Medicine, 720 Rutland Avenue, Baltimore, Maryland 21205, USA.
- Department of Neuroscience, Johns Hopkins University, School of Medicine, 725 N. Wolfe Street, Baltimore, Maryland 21205, USA.
Correspondence to: Charles E Connor1,3 e-mail: connor@jhu.edu
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