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Temporal nulling of induction from spatial patterns modulated in time

Published online by Cambridge University Press:  06 September 2006

FLORENT AUTRUSSEAU  and
STEVEN K. SHEVELL
FLORENT AUTRUSSEAU
Affiliation:
Visual Science Laboratories, University of Chicago, Chicago, Illinois Polytech'Nantes, IRCCyN, Nantes, France
STEVEN K. SHEVELL
Affiliation:
Visual Science Laboratories, University of Chicago, Chicago, Illinois
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Abstract

Temporally varying chromatic-inducing light was used to infer receptive-field organization. Time-varying shifts in color appearance within a test field were induced by a surrounding chromatic pattern; the shifts were then nulled by adding a time-varying stimulus to the test area so the observer perceived a steady test. This method measured chromatic induction without requiring an observer to judge the color appearance of the test. The induced color shifts were consistent with a +s/−s spatially antagonistic neural receptive field, which also accounts for color shifts induced by static chromatic patterns (Monnier & Shevell, 2003, Monnier & Shevell, 2004). The response of this type of receptive-field, which is found only in the visual cortex, increases with S-cone stimulation at its center and decreases with S-cone stimulation within its surround. The measurements also showed a negligible influence of temporal inducing frequency in the range 0.5–4 Hz.

Keywords

chromatic inductiontemporal nulling+s/−s spatially antagonistic receptive field

Information

Type
TEMPORAL FACTORS
Information
Visual Neuroscience , Volume 23 , Issue 3-4 , May 2006 , pp. 479 - 482
Copyright
© 2006 Cambridge University Press

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