Prefrontal inputs to the amygdala instruct fear extinction memory formation

Olena Bukalo*, Courtney R. Pinard, Shana Silverstein, Christina Brehm, Nolan D. Hartley, Nigel Whittle, Giovanni Colacicco, Erica Busch, Sachin Patel, Nicolas Singewald, Andrew Holmes

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

129 Scopus citations

Abstract

Persistent anxiety after a psychological trauma is a hallmark of many anxiety disorders. However, the neural circuits mediating the extinction of traumatic fear memories remain incompletely understood. We show that selective, in vivo stimulation of the ventromedial prefrontal cortex (vmPFC)–amygdala pathway facilitated extinction memory formation, but not retrieval. Conversely, silencing the vmPFC-amygdala pathway impaired extinction formation and reduced extinction-induced amygdala activity. Our data demonstrate a critical instructional role for the vmPFC-amygdala circuit in the formation of extinction memories. These findings advance our understanding of the neural basis of persistent fear, with implications for posttraumatic stress disorder and other anxiety disorders.

Original languageEnglish (US)
Article number1500251
JournalScience Advances
Volume1
Issue number6
DOIs
StatePublished - 2015
Externally publishedYes

ASJC Scopus subject areas

  • General

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