title: Visual unpatterned input determines the occurrence of reward-contingent positive variation.
mesh_terms: D000818:Animals; D002415:Cats; D002540:Cerebral Cortex / Q000502:physiology*; D003216:Conditioning, Operant; D004569:Electroencephalography; D005260:Female; D005508:Food Deprivation; D008027:Light; D008297:Male; D008892:Milk; D011603:Psychophysiology; D012201:Reward; D014796:Visual Perception; D014868:Water Deprivation