October 1979
Volume 18, Issue 10
Articles  |   October 1979
Blue-sensitive cones of the cat produce a rodlike electroretinogram.
Investigative Ophthalmology & Visual Science October 1979, Vol.18, 1076-1081. doi:
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      E Zrenner, P Gouras; Blue-sensitive cones of the cat produce a rodlike electroretinogram.. Invest. Ophthalmol. Vis. Sci. 1979;18(10):1076-1081.

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      © ARVO (1962-2015); The Authors (2016-present)

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Two cone mechanisms are identifiable in the strongly yellow light-adapted electroretinogram (ERG) of the arterially perfused cat eye. One has its maximum spectral sensitivity near 555 nm; the other has its maximum near 450 nm. The former cone system produces a much larger signal with characteristics of a typical cone or inhibitory ERG. The latter cone system produces a small, saturable signal (less than 5 microV) which resembles a rodlike or excitatory ERC. The results imply that the latter ERG is generated by blue-sensitive cones, which form a small fraction of the total cone population and share some physiological and perhaps anatomical properties of rods.


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