February 1962
Volume 1, Issue 1
Articles  |   February 1962
The Resonant Frequencies of Rod and Cone Electroretinograms
Author Affiliations
    National Institute of Neurological Diseases and Blindness, National Institutes of Health, Public Health Service, United States Department of Health, Education, and Welfare, Bethesda 14, Md.
Investigative Ophthalmology & Visual Science February 1962, Vol.1, 122-126. doi:
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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)

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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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