Norepinephrine regulates long-term potentiation of both the population spike and dendritic EPSP in hippocampal dentate gyrus.
Hippocampal slices from norepinephrine (NE)-depleted rats exhibited marked reductions in long-term potentiation (LTP) of both the population spike and dendritic EPSP in the dentate gyrus. In contrast, depletion of serotonin (5-hydroxytryptamine, 5-HT) had no effect on either population spike or EPSP-LTP. In addition, superfusion of slices with NE produced potentiation of both the granule cell population spike and dendritic EPSP which persisted long after NE washout. These data support a role for NE in regulating long-term plasticity of both granule cell action potential firing and dendritic EPSPs.
D000200:Action Potentials; D000818:Animals; D003712:Dendrites / Q000502:physiology; D006624:Hippocampus / Q000502:physiology*; D066298:In Vitro Techniques; D008297:Male; D009473:Neuronal Plasticity; D009638:Norepinephrine / Q000502:physiology*; D051381:Rats; D012701:Serotonin / Q000502:physiology; D009435:Synaptic Transmission
D012701:Serotonin; D009638:Norepinephrine