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Suppressive effect of sustained low-contrast adaptation followed by transient high-contrast on peripheral target detection

Moradi, Farshad and Shimojo, Shinsuke (2004) Suppressive effect of sustained low-contrast adaptation followed by transient high-contrast on peripheral target detection. Vision Research, 44 (5). pp. 449-460. ISSN 0042-6989. http://resolver.caltech.edu/CaltechAUTHORS:20130816-103216311

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Abstract

We observed that presenting a low-contrast Gabor patch (2 cpd, 5° eccentricity, contrast=4%) for 8 s and then flashing a 20–30 ms high-contrast patch over it could elicit the perceptual disappearance of a subsequent low-contrast stimulus, whereas neither low-contrast adaptation nor high-contrast flash alone had any considerable effect (p<0.00001). In other experiments we found (a) suppressive components are phase-insensitive, (b) the effect transfers between eyes, (c) suppression is selective for orientation, and (d) the induction by the transient high-contrast Gabor patch could be transferred to another previously adapted location up to a few degrees. Results indicate synergy between contrast and adaptation through a non-linear interaction between rapid gain adjustment to transient change and adaptation to sustained spatial patterns. Findings are compatible with non-local mechanisms presumably at the cortical level.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1016/j.visres.2003.10.005DOIArticle
http://www.sciencedirect.com/science/article/pii/S0042698903006485PublisherArticle
Additional Information:Received 4 March 2003; received in revised form 2 October 2003. c2003 Elsevier Ltd.
Group:Koch Laboratory, KLAB
Subject Keywords:Contrast and edge adaptation; Peripheral visual field; Detection; Filling-in; Troxler fading; Visual transients
Record Number:CaltechAUTHORS:20130816-103216311
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20130816-103216311
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:40477
Collection:CaltechAUTHORS
Deposited By: KLAB Import
Deposited On:11 Mar 2010 06:04
Last Modified:16 Sep 2013 18:18

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