title: Spontaneous activity in visual systems.
mesh_terms: D000221:Adaptation, Ocular; D000818:Animals; D002415:Cats; D003623:Dark Adaptation; D004558:Electric Stimulation; D004594:Electrophysiology; D005556:Form Perception; D008027:Light; D008991:Monitoring, Physiologic; D009482:Neurophysiology; D011930:Reaction Time; D012160:Retina / Q000502:physiology; D012890:Sleep; D013564:Sympathetic Nervous System / Q000502:physiology; D009435:Synaptic Transmission; D009626:Terminology as Topic; D014785:Vision, Ocular; D014793:Visual Cortex