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Psychopharmacology

, Volume 236, Issue 1, pp 59–72 | Cite as

Preclinical studies of stress, extinction, and prefrontal cortex: intriguing leads and pressing questions

  • Cara L. WellmanEmail author
  • Kelly M. Moench
Review
  • 206 Downloads

Abstract

Background

Stress is associated with cognitive and emotional dysfunction, and increases risk for a variety of psychological disorders, including depression and posttraumatic stress disorder. Prefrontal cortex is critical for executive function and emotion regulation, is a target for stress hormones, and is implicated in many stress-influenced psychological disorders. Extinction of conditioned fear provides an excellent model system for examining how stress-induced changes in corticolimbic structure and function are related to stress-induced changes in neural function and behavior, as the neural circuitry underlying this behavior is well characterized.

Objectives

This review examines how acute and chronic stress influences extinction and describes how stress alters the structure and function of the medial prefrontal cortex, a potential neural substrate for these effects. In addition, we identify important unanswered questions about how stress-induced change in prefrontal cortex may mediate extinction deficits and avenues for future research.

Key findings

A substantial body of work demonstrates deficits in extinction after either acute or chronic stress. A separate and substantial literature demonstrates stress-induced neuronal remodeling in medial prefrontal cortex, along with several key neurohormonal contributors to this remodeling, and there is substantial overlap in prefrontal mechanisms underlying extinction and the mechanisms implicated in stress-induced dysfunction of—and neuronal remodeling in—medial prefrontal cortex. However, data directly examining the contribution of changes in prefrontal structure and function to stress-induced extinction deficits is currently lacking.

Conclusions

Understanding how stress influences extinction and its neural substrates as well as individual differences in this effect will elucidate potential avenues for novel interventions for stress-sensitive disorders characterized by deficits in extinction.

Keywords

Chronic stress Infralimbic cortex Prelimbic cortex Extinction 

Notes

Funding

This work was supported in part by National Institute of Health Award Number T32MH103213, National Institute of Health Award Number T32HD049336, and National Institute of Health Award Number UL1TR001108.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Psychological & Brain SciencesIndiana UniversityBloomingtonUSA
  2. 2.Center for the Integrative Study of Animal BehaviorIndiana UniversityBloomingtonUSA
  3. 3.Program in NeuroscienceIndiana UniversityBloomingtonUSA

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