Abstract
The delayed response from frog retinal ganglion cells is preceded by a long silent period which has been shown to depend upon (i) intensity of the stimulus light flash, (ii) background illumination, and (iii) instantaneous level of adaptation. Also the duration of the delayed response and the total number of spikes elicited are functions of these three parameters. A linear relationship has been found between the silent period and both delayed response duration and total number of spikes. Double-flash experiments indicate that the ganglion cell output is strongly inhibited during the silent period. Experiments using an inhomogenous stimulus field have led to the conclusion that parts of the receptive field contribute independently to the delayed response.
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