A new component in the a-wave of the human cone electroretinogram.
The human cone electroretinogram (ERG) to a full field flash has been examined on a rod saturating background (17,000 photopic trolands). With strong stimuli, a negative wavelet appears in the falling phase of the a-wave. This response has a latency of 10-12 milliseconds, about 6-8 milliseconds after the start of the a-wave and just before the rising phase of the corneal positive b-wave begins. We suggest that it may represent a hyperpolarizing response of second order retinal neurons.
Gouras
P
P
Department of Ophthalmology, Columbia University, New York City, NY 10032, USA. pg10@columbia.edu
MacKay
C
C
D000328:Adult; D004596:Electroretinography / Q000379:methods*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009474:Neurons / Q000502:physiology; D010775:Photic Stimulation; D017949:Retinal Cone Photoreceptor Cells / Q000502:physiology*