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PETER GOURAS, RALPH D. GUNKEL; The Resonant Frequencies of Rod and Cone Electroretinograms. Invest. Ophthalmol. Vis. Sci. 1962;1(1):122-126.
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© ARVO (1962-2015); The Authors (2016-present)
The ERG of the albino rat and the gray squirrel was studied tuith sinusoidally flickering light and D.C. amplification. It was found that: The rat's ERG has a resonant frequency of 2 to 4 c.p.s. ivith attenuation at both lower and higher frequencies; the bandwidth of the response extends from 0.05 to 25 c.p.s. The squirrel's ERG has a resonant frequency of 9 to 10 c.p.s. with a bandwidth of approximately 1 to 100 c.p.s. Increasing the light intensity broadens the bandwidth but does not shift the resonant frequency greatly. Analogies are made between the response of these pure rod and cone retinas and the low-frequency characteristics of human vision.
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