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Sex differences in intrusive memories following trauma


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Hsu, C-MK, Kleim, B, Nicholson, E, Zuj, DV ORCID: 0000-0002-6376-8354, Cushing, PJ, Gray, Kate, Clark, L and Felmingham, KL 2018 , 'Sex differences in intrusive memories following trauma' , PLoS ONE, vol. 13, no. 12 , e0208575 , doi: 10.1371/journal.pone.0208575.

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Background: A key mechanism thought to underlie Posttraumatic Stress Disorder (PTSD) is enhanced emotional memory consolidation. Recent evidence in healthy controls revealed that women have greater negative memory consolidation following stress relative to men. This study examined emotional memory consolidation in women and men with PTSD, and in trauma-exposed and non-trauma controls to test the hypothesis that emotionally negative memory consolidation would be greater in women with PTSD. Method: One hundred and forty-seven men and women (47 with PTSD, 49 trauma-exposed controls, and 51 non-trauma controls) completed an emotional memory task where they looked at negative, neutral and positive images from the International Affective Picture System (IAPS). Delayed recall and an intrusive memory diary were completed two days later. Results: Women displayed greater recall, and reported more negative intrusive memories than men. A gender x group interaction effect showed that both women with PTSD and trauma-exposed women reported more intrusive memories than women without trauma exposure or men. Conclusion: This study provided preliminary evidence of sex differences in intrusive memories in those with PTSD as well as those with a history of trauma exposure. Future research should include measures of sex hormones to further examine sex differences on memory consolidation in the context of trauma exposure and PTSD.

Item Type: Article
Authors/Creators:Hsu, C-MK and Kleim, B and Nicholson, E and Zuj, DV and Cushing, PJ and Gray, Kate and Clark, L and Felmingham, KL
Keywords: memory, sex differences, PTSD
Journal or Publication Title: PLoS ONE
Publisher: United States
ISSN: 1932-6203
DOI / ID Number: 10.1371/journal.pone.0208575
Copyright Information:

Copyright 2018 Hsu et al. Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0)

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