Propagation of activity-dependent synaptic depression in simple neural networks

Reiko Maki Fitzsimonds, Hong Jun Song, Mu Ming Poo

Research output: Contribution to journalArticlepeer-review

133 Scopus citations


Triple whole-cell recordings from simple networks of cultured hippocampal neurons show that induction of long-term depression at glutamatergic synapses is accompanied by a back propagation of depression to input synapses on the dendrite of the presynaptic neuron. The depression also propagates laterally to divergent outputs of the presynaptic neuron and to convergent inputs on the postsynaptic neuron. There is no forward propagation of depression to the output of the postsynaptic neuron and no presynaptic propagation accompanying long-term depression at GABAergic synapses. Activity-induced synaptic modification is therefore not restricted to the activated synapse, but selectively propagates throughout the neural network.

Original languageEnglish (US)
Pages (from-to)439-448
Number of pages10
Issue number6641
StatePublished - 1997
Externally publishedYes

ASJC Scopus subject areas

  • General


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