Low intensity tetanic stimulation induces long-term potentiation in hippocampal neurons.
A minimal intensity of the stimulation necessary for the induction of long-term potentiation of synaptic transmission (LTP) was investigated by intracellular recording in guinea pig in vitro hippocampal slices. High frequency stimulation of afferent fibres at intensities evoking in CA 1 neurons control excitatory postsynaptic potentials (EPSPs) of amplitudes 1-5 mV, resulted usually in a long-lasting increase in response amplitude. LTP was not observed at lower stimulus strength. The coactivation of a certain, though small number of synaptic contacts is thus necessary for the production of LTP.
Hess
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Kuhnt
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D000200:Action Potentials / Q000502:physiology; D000818:Animals; D004558:Electric Stimulation; D005260:Female; D006168:Guinea Pigs; D006624:Hippocampus / Q000166:cytology / Q000502:physiology*; D008297:Male; D009474:Neurons / Q000502:physiology*; D013569:Synapses / Q000502:physiology