title: [Electrical activity of the hippocampus during instrumental choice].
abstract: The power of theta-, delta-, alpha-, beta-low rhythms of the dorsal hippocampus telemetrically recorded was studied on four dogs after 24 and 48-hours water or food deprivation, after satisfaction of thirst and hunger as well as in choice between two different reinforcements (dried crust, water). A direct dependence between the strength of motivational state and the power of theta-rhythm has been found. In animals' behaviour two regimes of activity were singled out: stationary regime and transitory one. In the stationary regime, repetition of similar behavioural acts was attended by gradual increase in the power of theta-rhythm in the intervals between the signals. In case of changes from one behavioural form to the other (transitory regime) a selective sharp decline in the theta-rhythm power was observed.
mesh_terms: D000818:Animals; D001931:Brain Mapping; D002755:Choice Behavior / Q000502:physiology*; D003216:Conditioning, Operant / Q000502:physiology*; D004285:Dogs; D004569:Electroencephalography; D004594:Electrophysiology; D006624:Hippocampus / Q000502:physiology*; D006815:Hunger / Q000502:physiology*; D013894:Thirst / Q000502:physiology*
vernacular_title: Elektricheskaia aktivnost' gippokampa v usloviiakh instrumental'nogo vybora.