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Identification of a narrow post-ovulatory window of vulnerability to distressing involuntary memories in healthy women

Soni, M; Curran, HV; Kamboj, S; (2013) Identification of a narrow post-ovulatory window of vulnerability to distressing involuntary memories in healthy women. Neurobiology of Learning and Memory , 104 (Sep 2013) pp. 32-38. 10.1016/j.nlm.2013.04.003. Green open access

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Abstract

Psychological disorders characterised by intrusive memories are more prevalent in women than men. The biological, social and cognitive processes underlying this gender-difference have yet to be fully elucidated. Some evidence suggests that (fluctuations in) ovarian hormone levels are responsible for altered sensitivity to emotional stimuli during certain phases in the menstrual-cycle and this may form the basis of a specific vulnerability to psychological disorders in women. The post-ovulatory (luteal) phase has been identified as a period of particular vulnerability to the development of Post-Traumatic Stress Disorder (PTSD). Using an experimental model of PTSD, we examine whether differences are detectable between discrete phases in the menstrual-cycle in the experience of intrusive memories. Women (18-35 years-old) in one of three tightly-defined periods within the menstrual cycle – mid-follicular (n=15), early-luteal (n=15) and late-luteal (n=11) - provided saliva samples for ovarian-hormone assay and watched a distressing film. Subsequent intrusive memories, assessed using a daily online-diary, occurred significantly more frequently in the early-luteal group compared to mid-follicular and late-luteal groups. Intrusion frequency was negatively correlated with the estradiol-to-progesterone ratio, but not estradiol or progesterone alone, suggesting that the interactive effect of low estradiol and high progesterone at encoding contributes to the observed effect. Our results support the need for further research in a clinical context with naturally-cycling women who experience a traumatic event, since assessment of days-since-last-menses and ovarian hormone levels may help to identify those at greatest risk of developing re-experiencing symptoms akin to those seen in psychological disorder such as depression and PTSD.

Type: Article
Title: Identification of a narrow post-ovulatory window of vulnerability to distressing involuntary memories in healthy women
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.nlm.2013.04.003
Publisher version: http://dx.doi.org/10.1016/j.nlm.2013.04.003
Keywords: Intrusive memory, Involuntary memory, Post-Traumatic Stress Disorder, Menstrual cycle, Luteal phase, Follicular phase, Estradiol, Progesterone
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > Div of Psychology and Lang Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > Div of Psychology and Lang Sciences > Clinical, Edu and Hlth Psychology
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Population Health Sciences
URI: https://discovery.ucl.ac.uk/id/eprint/1391857
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