Rod–cone interactions and the temporal impulse response of the cone pathway

Zele, Andrew J., Cao, Dingcai, & Pokorny, Joel (2008) Rod–cone interactions and the temporal impulse response of the cone pathway. Vision Research, 48(26), pp. 2593-2598.

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Dark-adapted rods suppress cone-mediated flicker detection. This study evaluates the effect that rod activity has on cone temporal processing by investigating whether rod mediated suppression changes the cone pathway impulse response function, regardless of the form of the temporal signal. Stimuli were generated with a 2-channel photostimulator that has four primaries for the central field and four primaries for the surround. Cone pathway temporal impulse response functions were derived from temporal contrast sensitivity data with periodic stimuli, and from two-pulse discrimination data in which pairs of briefly pulsed stimuli were presented successively at a series of stimulus onset asynchronies. Dark-adapted rods altered the amplitude and timing of cone pathway temporal impulse response functions, irrespective of whether they were derived from measurements with temporally periodic stimuli or in a brief presentation temporal resolution task with pulsed stimuli. Rod–cone interactions are a fundamental operation in visual temporal processing under mesopic light levels, acting to decrease the temporal bandwidth of the visual system.

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ID Code: 18828
Item Type: Journal Article
Refereed: Yes
DOI: 10.1016/j.visres.2008.04.003
ISSN: 0042-6989
Divisions: Current > QUT Faculties and Divisions > Faculty of Health
Current > Institutes > Institute of Health and Biomedical Innovation
Current > Schools > School of Optometry & Vision Science
Copyright Owner: Copyright 2008 Elsevier
Deposited On: 16 Apr 2009 03:08
Last Modified: 12 Nov 2012 22:34

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