Title

Sensitivity Loss and Adaptation within the Short‐Wavelength Cone Pathway

Document Type

Article

Publication Date

6-1993

Digital Object Identifier (DOI)

https://doi.org/10.1002/col.5080180310

Abstract

Two‐color increment threshold data are used to develop a model of sensitivity control in short‐wavelength detection. The model includes two sites of compressive nonlinearity. The first site has the characteristics of the S cones. Their output combines antagonistically with signals from the L and M cones at a second (blue/yellow opponent) stage. The response nonlinearities were examined by measuring thresholds for a 420‐nm probe presented at the onset of flashed fields of 420‐nm, 520‐nm, and 580‐nm light. Adaptive mechanisms of multiplication and subtraction were identified by presenting probe and flash on steady backgrounds of varying intensity. Adaptation partially restores the sensitivity lost to response compression.

Was this content written or created while at USF?

Yes

Citation / Publisher Attribution

Color Research and Application, v. 18, issue 3, p. 210-217

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