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Science. 2013 Mar 15;339(6125):1290-5. doi: 10.1126/science.1229534.

A neural circuit for memory specificity and generalization.

Author information

1
Department of Molecular and Cellular Physiology and Howard Hughes Medical Institute, Stanford University, Stanford, CA 94304-5453, USA. weixu@stanford.edu

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.

PMID:
23493706
PMCID:
PMC3651700
DOI:
10.1126/science.1229534
[Indexed for MEDLINE]
Free PMC Article

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