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Psychiatry Res Neuroimaging. 2017 Aug 30;266:1-9. doi: 10.1016/j.pscychresns.2017.05.008. Epub 2017 May 19.

Frontal and subcortical grey matter reductions in PTSD.

Author information

1
The University of Sydney, Brain and Mind Centre, 100 Mallett Street, Camperdown, NSW 2050, Australia. Electronic address: daniel.odoherty@sydney.edu.au.
2
The University of Sydney, Brain and Mind Centre, 100 Mallett Street, Camperdown, NSW 2050, Australia.
3
University of the Sunshine Coast, Sunshine Coast Mind and Neuroscience - Thompson Institute, 12 Innovation Parkway, Birtinya, QLD 4575, Australia.

Abstract

Post-traumatic stress disorder (PTSD) is characterised by a range of debilitating psychological, physical and cognitive symptoms. PTSD has been associated with grey matter atrophy in limbic and frontal cortical brain regions. However, previous studies have reported heterogeneous findings, with grey matter changes observed beyond limbic/frontal areas. Seventy-five adults were recruited from the community, 25 diagnosed with PTSD along with 25 healthy and 25 trauma exposed age and gender matched controls. Participants underwent clinical assessment and magnetic resonance imaging. The data-analyses method Voxel Based Morphometry (VBM) was used to estimate cortical grey matter volumes. When compared to both healthy and trauma exposed controls, PTSD subjects demonstrated decreased grey matter volumes within subcortical brain regions-including the hippocampus and amygdala-along with reductions in the anterior cingulate cortex, frontal medial cortex, middle frontal gyrus, superior frontal gyrus, paracingulate gyrus, and precuneus cortex. Significant negative correlations were found between total CAPS lifetime clinical scores/sub-scores and GM volume of both the PTSD and TC groups. GM volumes of the left rACC and right amygdala showed a significant negative correlation within PTSD diagnosed subjects.

KEYWORDS:

MRI; Posttraumatic stress disorder; VBM

[Indexed for MEDLINE]

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