A neural circuit for memory specificity and generalization

Wei Xu, Thomas C. Südhof

Research output: Contribution to journalArticle

279 Scopus citations

Abstract

Increased fear memory generalization is associated with posttraumatic stress disorder, but the circuit mechanisms that regulate memory specificity remain unclear. Here, we define a neural circuit - composed of the medial prefrontal cortex, the nucleus reuniens (NR), and the hippocampus - that controls fear memory generalization. Inactivation of prefrontal inputs into the NR or direct silencing of NR projections enhanced fear memory generalization, whereas constitutive activation of NR neurons decreased memory generalization. Direct optogenetic activation of phasic and tonic action-potential firing of NR neurons during memory acquisition enhanced or reduced memory generalization, respectively. We propose that the NR determines the specificity and generalization of memory attributes for a particular context by processing information from the medial prefrontal cortex en route to the hippocampus.

Original languageEnglish (US)
Pages (from-to)1290-1295
Number of pages6
JournalScience
Volume339
Issue number6125
DOIs
StatePublished - Mar 15 2013

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ASJC Scopus subject areas

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