Glutamatergic synapses onto hippocampal interneurons: Precision timing without lasting plasticity

Chris J. McBain, Tamas F. Freund, Istvan Mody

Research output: Contribution to journalReview article

94 Citations (Scopus)

Abstract

In the hippocampal formation GABAergic inhibitory interneurons have a major role in the synchronization of neuronal activity and are involved in the generation of large-scale network oscillations. Thus, interneurons function as a 'clock' that dictates when principal cells fire during suprathreshold excitatory drive. Interneurons receive strong excitatory innervation from glutamatergic neurons and it has been much debated whether these synapses show mechanisms of long-term plasticity similar to those found at principal-cell synapses. Recent findings support the lack of conventional forms of LTP and LTD in most interneurons, partly owing to the distinct anatomical and neurochemical features of interneuronal excitatory synapses. The uncommon properties of excitatory synapses on interneurons might be required for their functioning as accurate and reliable neuronal oscillators.

Original languageEnglish
Pages (from-to)228-235
Number of pages8
JournalTrends in Neurosciences
Volume22
Issue number5
DOIs
Publication statusPublished - May 1 1999

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ASJC Scopus subject areas

  • Neuroscience(all)

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