Hippocampal synaptic depression following spatial learning in a complex maze.

Abstract:

:Activity-dependent alteration in synaptic efficacy is referred to as synaptic plasticity and is the believed hallmark of any learning process. Here we employed a recently validated complex maze for spatial training and investigated the impact of repeated and extensive training on basal synaptic transmission of the hippocampal Schaffer collateral-CA1 synaptic connection in vitro. In the present experiments, male CD-1 mice were trained in a complex maze for eight consecutive days five times a day. Subsequently, input-output functions of field excitatory postsynaptic potentials (fEPSPs) recorded in the CA1 area following stimulation of the Schaffer collateral-commissural fiber pathway were analyzed in acute hippocampal slices. We found a marked right shift of the fEPSP response in trained compared to untrained animals while fiber volley size remained unchanged. The findings provide evidence for a direct implication of homosynaptic hippocampal long-term depression in a spatial learning paradigm.

journal_name

Exp Neurol

journal_title

Experimental neurology

authors

Lange-Asschenfeldt C,Lohmann P,Riepe MW

doi

10.1016/j.expneurol.2006.08.025

subject

Has Abstract

pub_date

2007-02-01 00:00:00

pages

481-5

issue

2

eissn

0014-4886

issn

1090-2430

pii

S0014-4886(06)00532-2

journal_volume

203

pub_type

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