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Transmission of spatial information in S-cone pathways

Published online by Cambridge University Press:  20 May 2002

ANDREW B. METHA  and
PETER LENNIE
ANDREW B. METHA
Affiliation:
Center for Visual Science, University of Rochester, Rochester, New York
PETER LENNIE
Affiliation:
Present address of Peter Lennie: Center for Neural Science, New York University, 4 Washington Place, New York, NY 10003, USA.
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Abstract

The mosaics of S-cones and the neurons to which they are connected are relatively well characterized, so the S-cone system is a good vehicle for exploring how the sampling of the retinal image controls visual performance. We used an interferometer to measure the grating acuity of the S-cone system in the fovea and at a range of eccentricities out to 20 deg. We also developed a simple model observer that, by assuming only that cone pathways are noisy and that signals are subject to eccentricity-dependent postreceptoral pooling, predicts the measured acuities from the sampling properties of the S-cone mosaic. The amount of pooling required to explain performance is consistent with that suggested by anatomical and physiological measurements.

Keywords

S-conesAliasingAcuitySpatial frequency
Type
Research Article
Information
Visual Neuroscience , Volume 18 , Issue 6 , November 2001 , pp. 961 - 972
Copyright
© 2001 Cambridge University Press

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