UCL logo

UCL Discovery

UCL home » Library Services » Electronic resources » UCL Discovery

Hebbian LTP in feed-forward inhibitory interneurons and the temporal fidelity of input discrimination

Lamsa, K; Heeroma, JH; Kullmann, DM; (2005) Hebbian LTP in feed-forward inhibitory interneurons and the temporal fidelity of input discrimination. NAT NEUROSCI , 8 (7) 916 - 924. 10.1038/nn1486.

Full text not available from this repository.

Abstract

Cortical information processing requires a delicate balance of excitatory and inhibitory signaling. How is this balance preserved during hippocampal memory encoding, which involves NMDA receptor-dependent long term potentiation (LTP)? This form of LTP occurs at synapses between pyramidal neurons but has not been detected in feed-forward inhibitory interneurons. We show that paired pre- and postsynaptic activity evokes pathway-specific LTP in half of rat stratum radiatum interneurons if cytoplasmic integrity is preserved. LTP occurs in aspiny feed-forward interneurons and propagates to pyramidal neurons as an enhancement of disynaptic inhibition. We also show that when LTP is restricted to synapses on pyramidal neurons, the temporal fidelity of synaptic integration and action potential generation in pyramidal cells is compromised. However, when LTP also occurs at synapses on feed-forward interneurons, temporal fidelity is preserved. We propose that Hebbian LTP at synapses driving disynaptic inhibition is necessary to maintain information processing without degradation during memory encoding.

Type: Article
Title: Hebbian LTP in feed-forward inhibitory interneurons and the temporal fidelity of input discrimination
DOI: 10.1038/nn1486
Keywords: LONG-TERM POTENTIATION, RAT HIPPOCAMPAL SLICES, EXCITATORY SYNAPSES, SYNAPTIC PLASTICITY, DENDRITIC SPINES, CA1 NEURONS, CELL, FORM, EXCITABILITY, MECHANISMS
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > UCL Queen Square Institute of Neurology
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > UCL Queen Square Institute of Neurology > Clinical and Experimental Epilepsy
URI: http://discovery.ucl.ac.uk/id/eprint/142719
Downloads since deposit
0Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item