title: Circadian rhythm of synaptic excitability in rat and monkey central nervous system.
abstract: Synaptic responses in hippocampal granule cells to stimulation of their afferent fibers from the entorhinal cortex fluctuate with a 24-hour period. The phase of this cycle for rats and monkeys depends on whether the animal is naturally nocturnal or diurnal. In a rat blinded by enucleation, the rhythm persists but drifts out of phase with the rhythm of sighted controls.
mesh_terms: D000200:Action Potentials; D000818:Animals; D002940:Circadian Rhythm; D003624:Darkness; D005071:Evoked Potentials; D000882:Haplorhini; D006624:Hippocampus / Q000502:physiology*; D008027:Light; D051381:Rats; D012453:Saimiri; D013569:Synapses / Q000502:physiology*; D009435:Synaptic Transmission; D014785:Vision, Ocular