Abstract
BIDIRECTIONAL control of synaptic strength is thought to be important for the development of neuronal circuits and information storage. The demonstration of homosynaptic long-term depression1 greatly enhances the usefulness of the synapse as a mnemonic device, but theoreticians have also seen the need for heterosynaptic decreases in synaptic efficacy, both in neuronal development2–4 and information storage5. Indeed, induction of long-term potentiation in one population of synapses can be associated with a modest depression at neighbouring inactive synapses in the same population of cells6–10. Here we report that in the CA1 region of the hippocampus this heterosynaptic long-term depression has the property that its sites of induction and expression occur in different populations of cells and thus requires the spread of a signal between neurons. Such a mechanism ensures a widespread distribution of this form of plasticity.
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Scanziani, M., Malenka, R. & Nicoll, R. Role of intercellular interactions in heterosynaptic long-term depression. Nature 380, 446–450 (1996). https://doi.org/10.1038/380446a0
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DOI: https://doi.org/10.1038/380446a0
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