Orcadian rhythmicity of retinal photosensitivity in Japanese quail found in ERG pattern

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Abstract
The circadian change of the encephalic photosensitivity of quail has been demonstrated. In this study the diurnal variation of the retinal photosensitivity was investigated by the electroretinogram (ERG) to explore the phase relation between the retinal and encephalic systems. The b‐wave, a major component of the ERG, was used as a measure of retinal photosensitivity. These observations suggest that the diurnal rhythm of the neural retina in quail might be generated endogenously and appears to control the encephalic photosensitive system.