PMID: 8593296Oct 1, 1995Paper

Rod and cone components in the dog electroretinogram during and after dark adaptation

The Journal of Veterinary Medical Science
J YanaseH Ohtsuka

Abstract

In anesthetized beagle dogs, electroretinograms (ERGs) were recorded with full-field stimuli during, and after, dark adaptation. With blue stimuli, a cornea-positive b-wave appeared at 13 min in the dark, and b-wave increased in amplitude and peak latency with dark adaptation, reaching near-plateau level approximately 61 min after bleaching. This b-wave was considered to be derived from rods (scotopic b-wave) based on its spectral sensitivity function. After about 31 min, oscillatory potentials and a small cornea-negative wave preceding the b-wave appeared. With red stimuli, a small cornea-positive b-wave with a short peak latency appeared immediately after the start of dark adaptation. The amplitude and peak latency of this wave remained substantially unchanged for 16 min. It then gradually became obscure after the appearance, and increase in amplitude, of scotopic components. After 2 hr dark adaptation, ERGs elicited by blue and red stimuli showed essentially the same waveforms, and in contrast to the situation in humans and monkeys, the cone component was not easily distinguished in the waveform elicited by red stimulus. It was confirmed that the ERG elicited by red stimulus, under blue-green background light sufficient to e...Continue Reading

Citations

Apr 15, 2009·Documenta Ophthalmologica. Advances in Ophthalmology·Man Bok JeongKang Moon Seo
Feb 11, 2010·Documenta Ophthalmologica. Advances in Ophthalmology·O Varela LopezS G Rosolen
Jan 24, 2004·Veterinary Ophthalmology·András M KomáromyKirk N Gelatt
Mar 19, 2003·Veterinary Ophthalmology·András M KomáromyWilliam W Dawson
Sep 1, 2007·Veterinary Ophthalmology·Seiya MaeharaYasuharu Izumisawa
Oct 2, 2014·Journal of Veterinary Science·Metita SussadeeAree Thayananuphat
Nov 26, 2010·The Journal of Veterinary Medical Science·Man Bok JeongKang Moon Seo

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