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Trends Neurosci. 2015 Mar;38(3):158-66. doi: 10.1016/j.tins.2014.12.007. Epub 2015 Jan 9.

Amygdala-prefrontal interactions in (mal)adaptive learning.

Author information

1
Associate Research Scientist, Department of Psychiatry, 1051 Riverside Drive, Unit 87, Kolb Annex, Room 136, New York, NY 10032, USA. Electronic address: ebl2102@columbia.edu.
2
Department of Neurobiology, Weizmann Institute of Science, Rehovot, 76100 Israel. Electronic address: rony.paz@weizmann.ac.il.

Abstract

The study of neurobiological mechanisms underlying anxiety disorders has been shaped by learning models that frame anxiety as maladaptive learning. Pavlovian conditioning and extinction are particularly influential in defining learning stages that can account for symptoms of anxiety disorders. Recently, dynamic and task related communication between the basolateral complex of the amygdala (BLA) and the medial prefrontal cortex (mPFC) has emerged as a crucial aspect of successful evaluation of threat and safety. Ongoing patterns of neural signaling within the mPFC-BLA circuit during encoding, expression and extinction of adaptive learning are reviewed. The mechanisms whereby deficient mPFC-BLA interactions can lead to generalized fear and anxiety are discussed in learned and innate anxiety. Findings with cross-species validity are emphasized.

KEYWORDS:

amygdala; generalization; oscillations; pavlovian learning; prefrontal cortex; safety

PMID:
25583269
PMCID:
PMC4352381
DOI:
10.1016/j.tins.2014.12.007
[Indexed for MEDLINE]
Free PMC Article

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