Sensitivity Loss and Adaptation within the Short‐Wavelength Cone Pathway
Digital Object Identifier (DOI)
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.
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Citation / Publisher Attribution
Color Research and Application, v. 18, issue 3, p. 210-217
Scholar Commons Citation
Finkelstein, Marcie A., "Sensitivity Loss and Adaptation within the Short‐Wavelength Cone Pathway" (1993). Psychology Faculty Publications. 791.