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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

  • Editor: Franco Gori
  • Vol. 30, Iss. 11 — Nov. 1, 2013
  • pp: 2401–2408

Modeling lateral geniculate nucleus response with contrast gain control. Part 1: formulation

Davis Cope, Barbara Blakeslee, and Mark E. McCourt  »View Author Affiliations


JOSA A, Vol. 30, Issue 11, pp. 2401-2408 (2013)
http://dx.doi.org/10.1364/JOSAA.30.002401


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Abstract

A class of models for lateral geniculate nucleus (LGN) on-cell behavior is proposed. The models consist of a linear filter with divisive normalization by root mean square local contrast and include an intrinsic noise density parameter. The properties of these models are shown to match observed LGN behavior: (1) a linear response to low-magnitude stimuli; (2) a linear response without saturation (luxotonic behavior) for zero-contrast stimuli (homogeneous fields) with increasing magnitude; and (3) response saturation for nonzero contrast stimuli with increasing magnitude. The models possess an intrinsic scale for signal-to-noise ratio (SNR). The models show under and supersaturation, as well as saturation, for sinusoidal grating stimuli with increasing contrast and predict that different SNR regimes will cause a single neuron to show different contrast response curves. A companion paper [1] provides a detailed analysis of the full nonlinear response for sinusoidal grating stimuli and circular spot stimuli.

© 2013 Optical Society of America

OCIS Codes
(330.0330) Vision, color, and visual optics : Vision, color, and visual optics
(330.4060) Vision, color, and visual optics : Vision modeling
(330.4270) Vision, color, and visual optics : Vision system neurophysiology
(330.6110) Vision, color, and visual optics : Spatial filtering
(330.7320) Vision, color, and visual optics : Vision adaptation

ToC Category:
Vision, Color, and Visual Optics

History
Original Manuscript: May 28, 2013
Revised Manuscript: August 7, 2013
Manuscript Accepted: October 3, 2013
Published: October 28, 2013

Virtual Issues
Vol. 9, Iss. 1 Virtual Journal for Biomedical Optics

Citation
Davis Cope, Barbara Blakeslee, and Mark E. McCourt, "Modeling lateral geniculate nucleus response with contrast gain control. Part 1: formulation," J. Opt. Soc. Am. A 30, 2401-2408 (2013)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-30-11-2401

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