title: Electrophysiology in pigment epithelial changes.
abstract: The c-wave of the ERG and the slow SP variations reflect mainly the activity of the pigment epithelium. However, both potentials are dependent upon the photoreceptors and/or the inner retina as well. In pigment epithelial abnormalities the c-wave is reduced or abolished, and the slow SP variations, d.c. recorded directly or investigated with the EOG, reduced or abolished as well.
mesh_terms: D000222:Adaptation, Physiological; D000818:Animals; D003623:Dark Adaptation; D004285:Dogs; D004585:Electrooculography; D004596:Electroretinography; D006801:Humans; D008027:Light; D009472:Neuronal Ceroid-Lipofuscinoses / Q000503:physiopathology / Q000662:veterinary; D010857:Pigment Epithelium of Eye / Q000502:physiology* / Q000503:physiopathology; D011188:Potassium / Q000502:physiology; D012174:Retinitis Pigmentosa / Q000503:physiopathology
chemical_list: D011188:Potassium