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Published on: October 10, 2012
A coordinate-based meta-analytic model of trauma processing in posttraumatic stress disorder
Amy E Ramage1, Angela R Laird, Simon B Eickhoff
1Research Imaging Institute, University of Texas Health Science Center at San Antonio, San Antonio, Texas; Department of Psychiatry, University of Texas Health Science Center at San Antonio, San Antonio, Texas.
Human Brain Mapping
|September 1, 2012
Summary
This study identified unique brain activation patterns in patients with posttraumatic stress disorder (PTSD) during trauma imagery tasks. These findings highlight specific regions involved in PTSD, aiding future neuroimaging research.
Area of Science:
- Neuroimaging
- Psychiatry
- Cognitive Neuroscience
Background:
- Posttraumatic stress disorder (PTSD) symptoms can be triggered by traumatic imagery.
- Trauma imagery tasks are frequently used in functional neuroimaging studies of PTSD.
Purpose of the Study:
- To identify brain regions uniquely activated in PTSD patients during traumatic imagery tasks using coordinate-based meta-analysis (CBM).
- To explore the functional roles and interactions of these identified regions using meta-analytic connectivity modeling (MACM).
Main Methods:
- Coordinate-based meta-analysis (CBM) of eight studies involving 170 PTSD patients and 104 healthy controls.
- Meta-analytic connectivity modeling (MACM) with behavioral filtering to analyze functional interactions.
Main Results:
- Right anterior cingulate (ACC), right posterior cingulate (PCC), and left precuneus (Pcun) showed unique activation in PTSD patients.
- PCC and Pcun were co-active in cognitive information processing and explicit memory.
- ACC and PCC co-activity, mediated by the thalamus, was linked to emotional processing.
Conclusions:
- Identified specific brain regions (ACC, PCC, Pcun) uniquely active in PTSD during trauma recall.
- Established functional connectivity patterns linking these regions to cognitive and emotional processing relevant to PTSD.
- Proposed a model for enhanced statistical power in PTSD neuroimaging by integrating CBM and MACM findings.
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