JN AJP: Gastrointestinal and Liver Physiology
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH
 QUICK SEARCH:   [advanced]


     


J Neurophysiol (January 2, 2008). doi:10.1152/jn.01223.2007
This Article
Right arrow Full Text (PDF)
Right arrow Supplemental Videos
Right arrow All Versions of this Article:
99/3/1380    most recent
01223.2007v1
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Vinberg, J.
Right arrow Articles by Grill-Spector, K.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Vinberg, J.
Right arrow Articles by Grill-Spector, K.
Submitted on November 2, 2007
Accepted on December 26, 2007

Representation of Shapes, Edges, and Surfaces Across Multiple Cues in the Human Visual Cortex

Joakim Vinberg1 and Kalanit Grill-Spector1*

1 Psychology, Stanford University, Stanford, California, United States

* To whom correspondence should be addressed. E-mail: kalanit{at}psych.stanford.edu.

The lateral occipital complex (LOC) responds preferentially to objects compared to random stimuli or textures independent of the visual cue. However, it is unknown whether the LOC (or other cortical regions) are involved in the processing of edges or global surfaces without shape information. Here, we examined processing of (1) global shape, (2) disconnected edges without a global shape, and (3) global surfaces without edges vs. random stimuli across motion and stereo cues. The LOC responded more strongly to global shapes than edges, surfaces or random stimuli, for both motion and stereo cues, but its responses to local edges or global surfaces were not different than random stimuli. This suggests that the LOC processes shapes, not edges or surfaces. LOC also responded more strongly to objects than holes with the same shape, suggesting sensitivity to border ownership. V7 responded more strongly to edges than surfaces or random stimuli for both motion and stereo cues, while V3a and V4 preferred motion-edges. Finally, a region in the caudal intra-parietal sulcus (cIPS) responded more strongly to stereo versus motion, and to stereo-surfaces versus random stereo, (but not to motion-surfaces versus random-motion). Thus, we found evidence for cue-specific responses to surfaces in the cIPS, both cue-specific and cue-independent responses to edges in intermediate visual areas and shape-selective responses across multiple cues in the LOC. Overall, these data suggest that integration of visual information across multiple cues is mainly achieved at the level of shape and underscore LOC's role in shape computations.




This article has been cited by other articles:


Home page
J. Neurophysiol.Home page
J. Haushofer, C. I. Baker, M. S. Livingstone, and N. Kanwisher
Privileged Coding of Convex Shapes in Human Object-Selective Cortex
J Neurophysiol, August 1, 2008; 100(2): 753 - 762.
[Abstract] [Full Text] [PDF]




HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH
Visit Other APS Journals Online
Copyright © 2008 by the The American Physiological Society.