NDLI: Contributions of Parvocelular and Magnocellular Pathways to Metacontrast and Target Recovery

Content Provider	IEEE Xplore Digital Library
Author	Ogmen, H. Breitmeyer, B.G. Todd, S. Mardon, L.
Copyright Year	2005
Description	Author affiliation: Dept. of Electr. & Comput. Eng., Houston Univ., TX (Ogmen, H.)
Abstract	The visibility of a target stimulus (T) can be reduced by an aftercoming and spatially non-overlapping mask stimulus (M1), a phenomenon known as metacontrast masking. Interestingly, the visibility of the masked target can be recovered when a secondary mask (M2) is added to the T-M1 sequence. We analyzed a computational model of retino-cortical dynamics (RECOD) and derived the prediction that contrast dependence of metacontrast and target recovery should parallel the contrast dependence of afferent magnocellular and parvocellular pathways, respectively. In a psychophysical experiment, we tested this prediction by varying systematically M2's contrast. At the optimal T-M2 stimulus onset asynchrony (SOA), target recovery effect increased with M2's contrast without saturating, but at the optimal T-M2 metacontrast SOA, M1's visibility saturated very rapidly. Quantitative comparisons of psychophysical results with model simulations provide strong support for our prediction. We conclude that metacontrast masking is driven by signals originating from the magnocellular pathway and target recovery in metacontrast is driven by signals originating from the parvocellular pathway. These findings provide a link between the dynamics of the visual system and the architecture of the underlying neural processes
Starting Page	289
Ending Page	292
File Size	2075277
Page Count	4
File Format	PDF
ISBN	0780387104
DOI	10.1109/CNE.2005.1419614
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-03-16
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Semiconductor optical amplifiers Concurrent computing Visual system System testing Computational modeling Psychology Neural engineering Predictive models Timing Cognitive science
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in