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Childhood adversity and acute stress vulnerability at adulthood: The mediating role of sleep
- R. Admon
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- Journal:
- European Psychiatry / Volume 66 / Issue S1 / March 2023
- Published online by Cambridge University Press:
- 19 July 2023, p. S1105
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- Article
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Introduction
Numerous preclinical and clinical studies established the contribution of childhood adversity to acute stress vulnerability at adulthood. Several different physiological, psychological and behavioral factors have been suggested as putative mediators of this association. Sleep, and more specifically sleep disruption, has emerged as one such promising candidate. First, adverse childhood experiences have been repeatedly associated with adult sleep disorders. Second, individuals that suffer from stress-related psychopathology at adulthood often exhibit sleep disturbances, to the extent that sleep difficulties are diagnostic criteria for many of these disorders. Third, inefficient sleep pre and post exposure to acute stress was shown to increase the likelihood for maladaptive outcome, potently by impairing critical processes that occur during sleep as arousal regulation and memory consolidation.
ObjectivesTo date, very few studies integrated these independent lines of research. Also, previous studies mostly assessed sleep via self-reported diary or a single night measurement at laboratory settings. The current study aimed to provide a more ecological and continuous account for sleep patterns, and their putative associations with childhood adversity on the one hand and vulnerability to acute stress at adulthood on the other hand.
MethodsNinety-six healthy adult female participants completed the well-established childhood trauma questionnaire (CTQ) before wearing a wearable sensor for seven consecutive days and nights while maintaining their regular life routine. Following that, participants all underwent an acute laboratory stress induction procedure while their psychological and endocrine responses were recorded at multiple time points throughout.
ResultsSleep patterns fully mediated the association between childhood adversity and psychological response to acute stress at adulthood (Figure 1). Specifically, elevated levels of childhood trauma were associated with more variation in sleep duration across the recording period, which in turn was associated with higher stress-induced negative affect. Interestingly, this association did not emerge with respect to mean sleep time nor with stress-induced cortisol release.
ConclusionsResults imply that childhood trauma may lead to irregular sleep patterns which in turn contribute to exaggerated emotional response to acute stress at adulthood. These findings support the mediating role of sleep in the link between childhood adversity and acute stress vulnerability at adulthood, and highlight sleep as a viable target for early or even preventive intervention.
Disclosure of InterestNone Declared
A neurobehavioral account for individual differences in resilience to chronic military stress
- T. Lin, S. Vaisvaser, E. Fruchter, R. Admon, I. Wald, D. S. Pine, Y. Bar-Haim, T. Hendler
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- Journal:
- Psychological Medicine / Volume 45 / Issue 5 / April 2015
- Published online by Cambridge University Press:
- 05 September 2014, pp. 1011-1023
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Background.
Military training is a chronic stressful period that often induces stress-related psychopathology. Stress vulnerability and resilience depend on personality trait anxiety, attentional threat bias and prefrontal–limbic dysfunction. However, how these neurobehavioral elements interact with regard to the development of symptoms following stress remains unclear.
Method.Fifty-five healthy combat soldiers undergoing intensive military training completed functional magnetic resonance imaging (fMRI) testing while performing the dot-probe task (DPT) composed of angry (threat) and neutral faces. Participants were then stratified according to their bias tendency to avoidance (n = 25) or vigilance (n = 30) groups, categorized as high or low trait anxiety and assessed for post-stress symptom severity.
Results.Avoidance compared to vigilance tendency was associated with fewer post-trauma symptoms and increased hippocampal response to threat among high anxious but not low anxious individuals. Importantly, mediation analysis revealed that only among high anxious individuals did hippocampal activity lead to lower levels of symptoms through avoidance bias tendency. However, in the whole group, avoidance bias was modulated by the interplay between the hippocampus and the dorsal anterior cingulate cortex (dACC).
Conclusions.Our results provide a neurobehavioral model to explain the resilience to post-trauma symptoms following chronic exposure. The model points to the importance of considering threat bias tendency in addition to personality traits when investigating the brain response and symptoms of trauma. Such a multi-parametric approach that accounts for individual behavioral sensitivities may also improve brain-driven treatments of anxiety, possibly by targeting the interplay between the hippocampus and the dACC.
Dissociable cortico-striatal connectivity abnormalities in major depression in response to monetary gains and penalties
- R. Admon, L. D. Nickerson, D. G. Dillon, A. J. Holmes, R. Bogdan, P. Kumar, D. D. Dougherty, D. V. Iosifescu, D. Mischoulon, M. Fava, D. A. Pizzagalli
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- Journal:
- Psychological Medicine / Volume 45 / Issue 1 / January 2015
- Published online by Cambridge University Press:
- 15 May 2014, pp. 121-131
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Background
Individuals with major depressive disorder (MDD) are characterized by maladaptive responses to both positive and negative outcomes, which have been linked to localized abnormal activations in cortical and striatal brain regions. However, the exact neural circuitry implicated in such abnormalities remains largely unexplored.
MethodIn this study 26 unmedicated adults with MDD and 29 matched healthy controls (HCs) completed a monetary incentive delay task during functional magnetic resonance imaging (fMRI). Psychophysiological interaction (PPI) analyses probed group differences in connectivity separately in response to positive and negative outcomes (i.e. monetary gains and penalties).
ResultsRelative to HCs, MDD subjects displayed decreased connectivity between the caudate and dorsal anterior cingulate cortex (dACC) in response to monetary gains, yet increased connectivity between the caudate and a different, more rostral, dACC subregion in response to monetary penalties. Moreover, exploratory analyses of 14 MDD patients who completed a 12-week, double-blind, placebo-controlled clinical trial after the baseline fMRI scans indicated that a more normative pattern of cortico-striatal connectivity pre-treatment was associated with greater improvement in symptoms 12 weeks later.
ConclusionsThese results identify the caudate as a region with dissociable incentive-dependent dACC connectivity abnormalities in MDD, and provide initial evidence that cortico-striatal circuitry may play a role in MDD treatment response. Given the role of cortico-striatal circuitry in encoding action–outcome contingencies, such dysregulated connectivity may relate to the prominent disruptions in goal-directed behavior that characterize MDD.