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Long-term potentiation in rat prefrontal slices facilitated by phased application of dopamine

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Abstract

We have previously shown that coupling bath application of dopamine with 50 Hz tetani induces long-term depression in rat prefrontal slices [Neuroscience 85 (1998) 669]. Here, we report a reliable protocol for inducing long-term potentiation in the same preparation. Long-term potentiation was induced by the same dopamine–tetani coupling protocol when the coupling was preceded (∼30 min) by a single bath application of dopamine. We suggest that metaplastic processes triggered by the first application of dopamine might underlie the LTP induction.

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