Responses to sinusoidal gratings of two types of very nonlinear retinal ganglion cells of cat

Visual Neuroscience
J B TroyC Enroth-Cugell

Abstract

Perhaps 35% of all of the ganglion cells of the cat do not have classical center-surround organized receptive fields. This paper describes, quantitatively, the responses of two such cell types to stimulation with sinusoidal luminance gratings, whose spatial frequency, mean luminance, contrast, and temporal frequency were varied independently. The patterns were well-focused on the retina of the anesthetized and paralyzed cat. In one type of cell, the maintained discharge was depressed or completely suppressed when a contrast pattern was imaged onto the receptive field (suppressed-by-contrast cell). In the other type of cell, the introduction of a pattern elicited a burst of spikes (impressed-by-contrast cell). When stimulated with drifting gratings, the cell's mean rate of discharge was reduced (suppressed-by-contrast cell) or elevated (impressed-by-contrast cell) over a limited band of spatial frequencies. There was no significant modulated component of response. The reduction in mean rate of suppressed-by-contrast cells caused by drifting gratings had a monotonic dependence on contrast, a relatively low-pass temporal-frequency characteristic and was greater under photopic than mesopic illuminance. If grating of spatial frequen...Continue Reading

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Citations

Nov 16, 2002·Progress in Retinal and Eye Research·Masami Watanabe, Yutaka Fukuda
Jul 26, 2012·Acta Histochemica Et Cytochemica·Chae-Woo YiChang-Jin Jeon
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Sep 29, 2011·Visual Neuroscience·Walter F Heine, Christopher L Passaglia
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