Detection of bimodal stimuli in the frog retina

Neuroscience and Behavioral Physiology
Ch A Izmaĭlov, M M Zimachev

Abstract

The present report addresses the electrical activity of the frog retina assessed using electroretinogram (ERG) recordings of responses to instantaneous changes from a reference line stimulus with fixed luminance and orientation to a test stimulus consisting of a line of different luminance and orientation. The analysis revealed two types of retinal responses. Responses to onset and offset of the line stimulus were analogous to responses obtained by homogeneous illumination of the retina and were characterized by a high-amplitude b wave (hundreds of microvolts) and significant asymmetry between the b and d waves. At the same time, interaction of these two stimuli yielded more symmetrical b and d waves, with amplitudes an order of magnitude lower, such that this frog retinal activity approached the ERG pattern recorded in response to formed stimuli in higher vertebrates. Analysis of the interaction of the mechanisms detecting the luminance and configurative characteristics of the stimuli, based on construction of V-shaped discrimination functions, showed that when the luminance of the stimulus line was only slightly different from the luminance of the reference line (i.e., discrimination occurred in the retinal stimulus adaptatio...Continue Reading

References

Jan 1, 1990·Annual Review of Psychology·R Shapley
Jan 1, 1985·Experimental Brain Research·L MaffeiH Holländer
Dec 1, 1974·The Journal of Comparative Neurology·T N Wiesel, D H Hubel
Dec 1, 1974·The Journal of Comparative Neurology·D H Hubel, T N Wiesel
Feb 15, 1974·Experimental Brain Research·O Estévez, H Spekreijse
Feb 1, 1971·Experimental Parasitology·D G EricksonA W Cheever
May 1, 1969·Journal of the Optical Society of America·L A Riggs, C E Sternheim
Aug 1, 1983·The Journal of Physiology·G B Arden, Vaegan
May 1, 1984·Journal of Neurophysiology·R F Hess, C L Baker
Jan 1, 1982·Vision Research·O Estévez, H Spekreijse
Jan 1, 1953·British Medical Bulletin·H J A DARTNALL
Nov 1, 1955·Journal of Neurophysiology·A FORBESM NEYLAND

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