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ERIC Number: EJ1002030
Record Type: Journal
Publication Date: 2013-Feb
Pages: 9
Abstractor: As Provided
Reference Count: 64
ISBN: N/A
ISSN: ISSN-0278-2626
An fMRI Investigation of Posttraumatic Flashbacks
Whalley, Matthew G.; Kroes, Marijn C. W.; Huntley, Zoe; Rugg, Michael D.; Davis, Simon W.; Brewin, Chris R.
Brain and Cognition, v81 n1 p151-159 Feb 2013
Flashbacks are a defining feature of posttraumatic stress disorder (PTSD), but there have been few studies of their neural basis. We tested predictions from a dual representation model of PTSD that, compared with ordinary episodic memories of the same traumatic event, flashbacks would be associated with activity in dorsal visual stream and related areas rather than in the medial temporal lobe. Participants with PTSD, with depression but not PTSD, and healthy controls were scanned during a recognition task with personally relevant stimuli. The contrast of flashbacks versus ordinary episodic trauma memories in PTSD was associated with increased activation in sensory and motor areas including the insula, precentral gyrus, supplementary motor area, and mid-occipital cortex. The same contrast was associated with decreased activation in the midbrain, parahippocampal gyrus, and precuneus/posterior cingulate cortex. The results were discussed in terms of theories of PTSD and dual-process models of recognition. (Contains 5 tables and 4 figures.)
Elsevier. 6277 Sea Harbor Drive, Orlando, FL 32887-4800. Tel: 877-839-7126; Tel: 407-345-4020; Fax: 407-363-1354; e-mail: usjcs@elsevier.com; Web site: http://www.elsevier.com
Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A