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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Vol. 2, Iss. 9 — Sep. 1, 1985
  • pp: 1607–1610

Neurophysiological evaluation of the differential response model for orientation and spatial-frequency discrimination

Arthur Bradley, Bernt C. Skottun, Izumi Ohzawa, Gary Sclar, and Ralph D. Freeman  »View Author Affiliations


JOSA A, Vol. 2, Issue 9, pp. 1607-1610 (1985)
http://dx.doi.org/10.1364/JOSAA.2.001607


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Abstract

Recent models have attempted to reconcile low psychophysical orientation and spatial-frequency discrimination thresholds with relatively broad orientation and spatial-frequency tuning of cortical neurons. These models have relied on the ability of the neurons to convert small stimulus changes into reliable response changes. We have examined this ability in a sample of neurons from the cat’s striate cortex. We present here data from two cells that reliably signaled the smallest orientation and spatial-frequency differences. Using receiver operating characteristic analysis, we find that these cells could reliably signal orientation differences of 1.84 deg and spatial-frequency differences of 0.073 octave. We compare these single-cell results to cat and human behavioral discrimination thresholds.

© 1985 Optical Society of America

History
Original Manuscript: February 19, 1985
Manuscript Accepted: April 29, 1985
Published: September 1, 1985

Citation
Arthur Bradley, Bernt C. Skottun, Izumi Ohzawa, Gary Sclar, and Ralph D. Freeman, "Neurophysiological evaluation of the differential response model for orientation and spatial-frequency discrimination," J. Opt. Soc. Am. A 2, 1607-1610 (1985)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-2-9-1607


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