Exposure-based therapy changes amygdala and hippocampus resting-state functional connectivity in patients with posttraumatic stress disorder

Xi Zhu, Benjamin Suarez-Jimenez, Amit Lazarov, Liat Helpman, Santiago Papini, Ari Lowell, Ariel Durosky, Martin A. Lindquist, John C. Markowitz, Franklin Schneier, Tor D. Wager, Yuval Neria*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Background: Recent research suggests that posttraumatic stress disorder (PTSD) is associated with altered amygdala and hippocampal resting-state functional connectivity (rsFC). However, less research has examined whether Prolonged Exposure (PE), a first line exposure-based treatment for PTSD, has the potential to alter resting state neural networks. Methods: A total of 24 patients with PTSD and 26 matched trauma-exposed healthy controls (TEHCs) underwent resting-state functional magnetic resonance imaging (fMRI) at baseline. PTSD patients were scanned a second time after completing 10-session PE in which patients narrated a detailed trauma account (imaginal exposure) and confronted trauma reminders (in vivo exposure) to extinguish trauma-related fear responses. TEHC were scanned again following a 10-week waiting period. Seed regions of interest (ROIs) included centromedial amygdala (CMA), basolateral amygdala (BLA), and the hippocampus. Results: Post- versus pretreatment comparisons indicated increased rsFC of the BLA and CMA with the orbitofrontal cortex (OFC), and hippocampus-medial prefrontal cortex (mPFC) among patients with PTSD, but not among TEHC participants. Conclusions: Enhanced amygdala and hippocampus rsFC with prefrontal cortical regions following PE could underlie improved capacity for inhibition and re-evaluation of threat, and heightened memory encoding and retrieval ability, respectively. These findings encourage further investigation of this circuitry as a therapeutic target in PTSD.

Original languageEnglish
Pages (from-to)974-984
Number of pages11
JournalDepression and Anxiety
Volume35
Issue number10
DOIs
StatePublished - Oct 2018
Externally publishedYes

Funding

FundersFunder number
Donald D. Harrington Fellows Program
New York Presbyterian Hospital
National Institute of Mental HealthT32MH015144, MH096724, R01MH072833, MH020004, R01MH105355
New York State Psychiatric Institute
Mack Foundation

    Keywords

    • PTSD
    • amygdala
    • fMRI
    • hippocampus
    • prolonged exposure treatment
    • resting-state functional connectivity

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