Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4035617 | Vision Research | 2005 | 10 Pages |
Abstract
In response to progressively brighter flashes, the amplitude of the photopic b-wave of the human electroretinogram (ERG) first increases, then saturates at a maximal value (Vmax) to finally decrease with the brightest flashes. The purpose of this study was to investigate if this “photopic hill” could be modulated with the use of stimuli of different wavelengths. ERGs were evoked to flashes of white, blue, green and red light presented against a white background in 30 normal subjects. Each chromatic stimulus produced a photopic hill. Findings indicate that the amplitude of Vmax was essentially identical except for that measured in response to the red stimuli, where it was 20% smaller than the others.
Keywords
Related Topics
Life Sciences
Neuroscience
Sensory Systems
Authors
Marianne Rufiange, Marie Dumont, Pierre Lachapelle,