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Changes in anterior cingulate and amygdala after cognitive behavior therapy of Posttraumatic Stress Disorder

Citation

Felmingham, KL and Kemp, A and Williams, LM and Das, P and Hughes, G and Peduto, A and Bryant, R, Changes in anterior cingulate and amygdala after cognitive behavior therapy of Posttraumatic Stress Disorder, Psychological Science, 18, (2) pp. 127-129. ISSN 0956-7976 (2007) [Refereed Article]


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The definitive published version is available online at: http://onlinelibrary.wiley.com/

DOI: doi:10.1111/j.1467-9280.2007.01860.x

Abstract

Posttraumatic stress disorder (PTSD) may develop from impaired extinction of conditioned fear responses. Exposure-based treatment of PTSD is thought to facilitate extinction learning (Charney, 2004). Fear extinction is mediated by inhibitory control of the ventromedial prefrontal cortex (vmPFC) over amygdala-based fear processes (Phelps, Delgado, Nearing, & LeDoux, 2004; Quirk, Russo, Barron, & LeBron, 2000). Most neuroimaging studies of PTSD reveal reduced vmPFC activity (particularly in rostral anterior cingulate cortex, or rACC; Lanius et al., 2001; Shin et al., 2005), and some find increased amygdala activity during threat processing (Shin et al., 2005). In addition, increased amygdala activity during fear conditioning and reduced vmPFC activity during extinction have been reported in PTSD (Bremner et al., 2005). Although PTSD patients show increased orbitofrontal and medial prefrontal activity following treatment with serotonin reuptake inhibitors (SSRIs; Fernandez et al., 2001; Seedat et al., 2004), no studies have investigated neural networks before and after exposure-based treatment of PTSD. We report the first such study. We hypothesized that symptom reduction would be associated with increased rACC activity and reduced amygdala activity during fear processing.

Item Details

Item Type:Refereed Article
Research Division:Psychology and Cognitive Sciences
Research Group:Psychology
Research Field:Biological Psychology (Neuropsychology, Psychopharmacology, Physiological Psychology)
Objective Division:Health
Objective Group:Clinical Health (Organs, Diseases and Abnormal Conditions)
Objective Field:Clinical Health (Organs, Diseases and Abnormal Conditions) not elsewhere classified
Author:Felmingham, KL (Professor Kim Felmingham)
ID Code:72323
Year Published:2007
Web of Science® Times Cited:118
Deposited By:Psychology
Deposited On:2011-08-25
Last Modified:2012-02-17
Downloads:2 View Download Statistics

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