Aversive-CS-specific alterations of evoked potentials in limbic and related areas of rats.
Averaged evoked potentials (EP) to a CS (flash) were recorded sequentially in classical appetitive conditioning, satiated state after appetitive conditioning, highly alert state by noncontingent shocks, and classical aversive conditioning from a rat. The EPs were obtained from the central gray matter, superior colliculus, perifornical hypothalamic area, dorsal frontal cortex, and occipital cortex. Alterations unique to aversive conditioning were found in the dorsal frontal cortex (40-60 msec in latency) and in the perifornical hypothalamus (80-120 msec) but not in the central gray or occipital cortex. The frontal cortex might start processing information related to aversive or defensive emotion before the perifornical hypothalamic area might do it.
D000818:Animals; D001070:Appetitive Behavior / Q000502:physiology; D001143:Arousal / Q000502:physiology*; D001362:Avoidance Learning / Q000502:physiology*; D003214:Conditioning, Classical / Q000502:physiology*; D004569:Electroencephalography; D004644:Emotions / Q000502:physiology; D005071:Evoked Potentials; D005625:Frontal Lobe / Q000502:physiology; D007034:Hypothalamus, Posterior / Q000502:physiology; D008032:Limbic System / Q000502:physiology*; D008297:Male; D009434:Neural Pathways / Q000502:physiology; D009778:Occipital Lobe / Q000502:physiology; D010487:Periaqueductal Gray / Q000502:physiology; D051381:Rats; D011919:Rats, Inbred Strains; D012154:Reticular Formation / Q000502:physiology; D013477:Superior Colliculi / Q000502:physiology