Journal
SCIENCE
Volume 339, Issue 6125, Pages 1290-1295Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1229534
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Funding
- Simons Foundation [177850]
- National Institute of Mental Health [P50 MH086403]
- National Institute of Neurological Disorders and Stroke [NS077906]
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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.
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