JN AJP: Cell Physiology
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH
QUICK SEARCH:   [advanced]


     

J Neurophysiol (September 1, 2004). doi:10.1152/jn.00039.2004
This Article
Right arrow Full Text (PDF)
Right arrow All Versions of this Article:
93/1/620    most recent
00039.2004v1
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 Hegde, J.
Right arrow Articles by Van Essen, D. C.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Hegde, J.
Right arrow Articles by Van Essen, D. C.
Submitted on January 12, 2004
Accepted on August 19, 2004

Stimulus Dependence of Disparity Coding in Primate Visual Area V4

Jay Hegde1 and David C. Van Essen1*

1 Anatomy & Neurobiology, Washington University, St. Louis, MO, USA

* To whom correspondence should be addressed. E-mail: vanessen{at}pulvinar.wustl.edu.

Disparity tuning in visual cortex has been demonstrated using a variety of stimulus types that contain stereoscopic depth cues. It is not known whether different stimuli yield similar disparity tuning curves. We studied whether cells in visual area V4 of the macaque show similar disparity tuning profiles when the same set of disparity values were tested using bars or dynamic random dot stereograms, which are among the most commonly used stimuli for this purpose. In a majority of V4 cells (61%) the shape of the disparity tuning profile differed significantly for the two stimulus types. The two sets of stimuli yielded statistically indistinguishable disparity tuning profiles for only a small minority (6%) of V4 cells. These results indicate that disparity tuning in V4 is stimulus-dependent. Given the fact that bar stimuli contain 2-D shape cues and the random dot stereograms do not, our results also indicate that V4 cells represent 2-D shape and binocular disparity in an interdependent fashion, revealing an unexpected complexity in the analysis of depth and 3-D shape.




This article has been cited by other articles:


Home page
 Physiol. Rev.Home page
G. A. Orban
Higher Order Visual Processing in Macaque Extrastriate Cortex
Physiol Rev, January 1, 2008; 88(1): 59 - 89.
[Abstract] [Full Text] [PDF]

Home page
 J. Neurophysiol.Home page
K. Umeda, S. Tanabe, and I. Fujita
Representation of Stereoscopic Depth Based on Relative Disparity in Macaque Area V4
J Neurophysiol, July 1, 2007; 98(1): 241 - 252.
[Abstract] [Full Text] [PDF]

Home page
 J. Neurophysiol.Home page
C. Chandrasekaran, V. Canon, J. C. Dahmen, Z. Kourtzi, and A. E. Welchman
Neural Correlates of Disparity-Defined Shape Discrimination in the Human Brain
J Neurophysiol, February 1, 2007; 97(2): 1553 - 1565.
[Abstract] [Full Text] [PDF]

Home page
 J. Neurophysiol.Home page
S. Tanabe, T. Doi, K. Umeda, and I. Fujita
Disparity-Tuning Characteristics of Neuronal Responses to Dynamic Random-Dot Stereograms in Macaque Visual Area V4
J Neurophysiol, October 1, 2005; 94(4): 2683 - 2699.
[Abstract] [Full Text] [PDF]

Home page
 J. Neurophysiol.Home page
D. A. Hinkle and C. E. Connor
Quantitative Characterization of Disparity Tuning in Ventral Pathway Area V4
J Neurophysiol, October 1, 2005; 94(4): 2726 - 2737.
[Abstract] [Full Text] [PDF]

Home page
 J. Neurophysiol.Home page
J. Hegde and D. C. Van Essen
Role of Primate Visual Area V4 in the Processing of 3-D Shape Characteristics Defined by Disparity
J Neurophysiol, October 1, 2005; 94(4): 2856 - 2866.
[Abstract] [Full Text] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH
Visit Other APS Journals Online
Copyright © 2004 by the The American Physiological Society.