Reliability and state dependence of pyramidal cell-interneuron synapses in the hippocampus: an ensemble approach in the behaving rat Journal Article


Author(s): Csicsvári, József; Hirase, Hajima; Czurkó, András; Buzsáki, György
Article Title: Reliability and state dependence of pyramidal cell-interneuron synapses in the hippocampus: an ensemble approach in the behaving rat
Affiliation
Abstract: Spike transmission probability between pyramidal cells and interneurons in the CA1 pyramidal layer was investigated in the behaving rat by the simultaneous recording of neuronal ensembles. Population synchrony was strongest during sharp wave (SPW) bursts. However, the increase was three times larger for pyramidal cells than for interneurons. The contribution of single pyramidal cells to the discharge of interneurons was often large (up to 0.6 probability), as assessed by the presence of significant (<3 ms) peaks in the cross-correlogram. Complex-spike bursts were more effective than single spikes. Single cell contribution was higher between SPW bursts than during SPWs or theta activity. Hence, single pyramidal cells can reliably discharge interneurons, and the probability of spike transmission is behavior dependent.
Keywords: Animals; Time Factors; Rats; Male; Rats, Sprague-Dawley; Synaptic Transmission; Action Potentials; Hippocampus; Interneurons; Pyramidal Cells; Neural Pathways; Synapses
Journal Title: Neuron
Volume: 21
Issue 1
ISSN: 0896-6273
Publisher: Elsevier  
Date Published: 1998-07-01
Start Page: 179
End Page: 189
DOI: 10.1016/S0896-6273(00)80525-5
Open access: no