Theta RhythmCircadian RhythmSeptum of BrainHippocampusHypothalamus, PosteriorUrethaneElectroencephalographyAlpha RhythmEntorhinal CortexSeptal NucleiBiological ClocksRats, Long-EvansSeptum PellucidumAmnesia, AnterogradePeriodicityMamillary BodiesDiagonal Band of BrocaMemoryAction PotentialsNeural PathwaysNeuronsInterneuronsWakefulnessPyramidal CellsSleep, REMSpatial BehaviorCA1 Region, HippocampalSpace PerceptionCholinergic FibersCholinergic AgonistsModels, NeurologicalRats, Sprague-DawleyAnesthesiaNerve NetProcaineBehavior, AnimalEvoked PotentialsNeural InhibitionMaze LearningAnesthetics, IntravenousDentate Gyrusgamma-Aminobutyric AcidSuprachiasmatic NucleusElectrophysiologySpectrum AnalysisPeriod Circadian ProteinsLong-Term PotentiationCircadian Rhythm Signaling Peptides and ProteinsNeural Networks (Computer)Time FactorsSynaptic TransmissionDelta RhythmActivity CyclesSleep Disorders, Circadian RhythmPhotoperiodRats, WistarElectric StimulationCerebral CortexCircadian ClocksSynapsesCLOCK ProteinsAtrial Fibrillation