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  Enhanced Selectivity for Natural Image Color in V4 but Not PF

Liebe, S., Logothetis, N., & Rainer, G. (2007). Enhanced Selectivity for Natural Image Color in V4 but Not PF. Poster presented at 10th Tübinger Wahrnehmungskonferenz (TWK 2007), Tübingen, Germany.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-CCD9-E Version Permalink: http://hdl.handle.net/21.11116/0000-0003-F4A1-3
Genre: Poster

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 Creators:
Liebe, S1, 2, Author              
Logothetis, NK1, 2, Author              
Rainer, G1, 2, Author              
Affiliations:
1Department Physiology of Cognitive Processes, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497798              
2Max Planck Institute for Biological Cybernetics, Max Planck Society, Spemannstrasse 38, 72076 Tübingen, DE, ou_1497794              

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 Abstract: Color in natural images adds a perceptual dimension which may facilitate object identification. Here we investigate whether color in natural images leads to changes in visual memory performance in the primate and study the neural basis of this effect in extrastriate area V4 and dorsolateral prefrontal cortex (PF). We used a procedure based on Fourier analysis to create colored and achromatic natural images as well as control patterns that carried no task specific information. We employed a delayed matching to sample paradigm: a sample stimulus (250ms) was presented followed by a probe stimulus (1s) after a delay period (1500ms). A lever press was required if the sample stimulus matched the probe. Monkeys’ recognition performance was near ceiling for both chromatic and achromatic natural images, and at chance for both kinds of control patterns. We have single neuron responses from a total of 84 neurons in V4 and 62 neurons in PF recorded from two monkeys. In V4 the majority of visually responsive units showed greater selectivity for chromatic than achromatic natural images in both monkeys (paired t-test p

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 Dates: 2007-07
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: BibTex Citekey: 4889
 Degree: -

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Title: 10th Tübinger Wahrnehmungskonferenz (TWK 2007)
Place of Event: Tübingen, Germany
Start-/End Date: 2007-07-27 - 2007-07-29

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Title: 10th Tübinger Perception Conference: TWK 2007
Source Genre: Proceedings
 Creator(s):
Bülthoff, HH1, Editor            
Chatziastros, A1, Editor            
Mallot, HA, Editor            
Ulrich, R, Editor
Affiliations:
1 Department Human Perception, Cognition and Action, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497797            
Publ. Info: Kirchentellinsfurt, Germany : Knirsch
Pages: - Volume / Issue: - Sequence Number: - Start / End Page: 135 Identifier: ISBN: 3-927091-77-4