title: [Cerebral refractory period of visual evoked potentials following total field and foveal stimulation].
abstract: Ten normal subjects of the age of 21 to 57 years were examined with single stimulus- and double stimulus-VEP following checkerboard whole field stimulation, foveal stimulation with a small checkerboard and flash. The latencies of the VEP following foveal stimulation are longer than those following whole field stimulation. There could not be determined a relative refractory period following checkerboard whole field stimulation at double stimulation. There is a relative refractory period following foveal stimulation between 80 and 100 ms. With retrobulbar neuritis at a late stage the relative refractory period is prolonged and it appears at about 150 ms.
mesh_terms: D000293:Adolescent; D000328:Adult; D005074:Evoked Potentials, Visual; D005260:Female; D005584:Fovea Centralis / Q000502:physiology; D006801:Humans; D008297:Male; D008875:Middle Aged; D009103:Multiple Sclerosis / Q000503:physiopathology; D009902:Optic Neuritis / Q000503:physiopathology; D010364:Pattern Recognition, Visual / Q000502:physiology; D011930:Reaction Time / Q000502:physiology*; D012033:Refractory Period, Psychological / Q000502:physiology*
vernacular_title: Zerebrale Refraktärperiode des VEP nach Ganzfeld- und fovealer Stimulation.