title: Visually-evoked potentials elicited by a light-emitting diode chronically implanted in the frontal sinus of the freely moving cat.
abstract: Visually-evoked potentials (VEPs) were obtained with a small yellow light-emitting diode (LED), chronically implanted in the frontal sinus of the cat. The VEPs obtained in scotopic conditions through the LED have a similar morphology to those obtained with a stroboscopic flash. A noticeable delay was observed in LED wave latencies versus flash values. Analysis of wave intervals indicated a long-lasting generation of LED VEPs primary components. Secondary responses have a similar pattern with both modalities of stimulation. Implanted LEDs can be used as a reliable method to obtain VEPs and especially in those behavioural or pathological conditions in which variations exist in the constancy of the ocular media.
mesh_terms: D000818:Animals; D002415:Cats; D005074:Evoked Potentials, Visual; D005626:Frontal Sinus; D008297:Male; D010775:Photic Stimulation / Q000295:instrumentation*; D012160:Retina / Q000502:physiology; D014793:Visual Cortex / Q000502:physiology; D014795:Visual Pathways / Q000502:physiology