Browsing by Author "Sheridan, Margaret A"

Filter results by typing the first few letters
Now showing 1 - 2 of 2
  • Thumbnail Image
    ItemOpen Access
    Altered white matter microstructural organization in posttraumatic stress disorder across 3047 adults: results from the PGC-ENIGMA PTSD consortium.
    (Molecular psychiatry, 2021-08) Dennis, Emily L; Disner, Seth G; Fani, Negar; Salminen, Lauren E; Logue, Mark; Clarke, Emily K; Haswell, Courtney C; Averill, Christopher L; Baugh, Lee A; Bomyea, Jessica; Bruce, Steven E; Cha, Jiook; Choi, Kyle; Davenport, Nicholas D; Densmore, Maria; du Plessis, Stefan; Forster, Gina L; Frijling, Jessie L; Gonenc, Atilla; Gruber, Staci; Grupe, Daniel W; Guenette, Jeffrey P; Hayes, Jasmeet; Hofmann, David; Ipser, Jonathan; Jovanovic, Tanja; Kelly, Sinead; Kennis, Mitzy; Kinzel, Philipp; Koch, Saskia BJ; Koerte, Inga; Koopowitz, Sheri; Korgaonkar, Mayuresh; Krystal, John; Lebois, Lauren AM; Li, Gen; Magnotta, Vincent A; Manthey, Antje; May, Geoff J; Menefee, Deleene S; Nawijn, Laura; Nelson, Steven M; Neufeld, Richard WJ; Nitschke, Jack B; O'Doherty, Daniel; Peverill, Matthew; Ressler, Kerry J; Roos, Annerine; Sheridan, Margaret A; Sierk, Anika; Simmons, Alan; Simons, Raluca M; Simons, Jeffrey S; Stevens, Jennifer; Suarez-Jimenez, Benjamin; Sullivan, Danielle R; Théberge, Jean; Tran, Jana K; van den Heuvel, Leigh; van der Werff, Steven JA; van Rooij, Sanne JH; van Zuiden, Mirjam; Velez, Carmen; Verfaellie, Mieke; Vermeiren, Robert RJM; Wade, Benjamin SC; Wager, Tor; Walter, Henrik; Winternitz, Sherry; Wolff, Jonathan; York, Gerald; Zhu, Ye; Zhu, Xi; Abdallah, Chadi G; Bryant, Richard; Daniels, Judith K; Davidson, Richard J; Fercho, Kelene A; Franz, Carol; Geuze, Elbert; Gordon, Evan M; Kaufman, Milissa L; Kremen, William S; Lagopoulos, Jim; Lanius, Ruth A; Lyons, Michael J; McCauley, Stephen R; McGlinchey, Regina; McLaughlin, Katie A; Milberg, William; Neria, Yuval; Olff, Miranda; Seedat, Soraya; Shenton, Martha; Sponheim, Scott R; Stein, Dan J; Stein, Murray B; Straube, Thomas; Tate, David F; van der Wee, Nic JA; Veltman, Dick J; Wang, Li; Wilde, Elisabeth A; Thompson, Paul M; Kochunov, Peter; Jahanshad, Neda; Morey, Rajendra A
    A growing number of studies have examined alterations in white matter organization in people with posttraumatic stress disorder (PTSD) using diffusion MRI (dMRI), but the results have been mixed which may be partially due to relatively small sample sizes among studies. Altered structural connectivity may be both a neurobiological vulnerability for, and a result of, PTSD. In an effort to find reliable effects, we present a multi-cohort analysis of dMRI metrics across 3047 individuals from 28 cohorts currently participating in the PGC-ENIGMA PTSD working group (a joint partnership between the Psychiatric Genomics Consortium and the Enhancing NeuroImaging Genetics through Meta-Analysis consortium). Comparing regional white matter metrics across the full brain in 1426 individuals with PTSD and 1621 controls (2174 males/873 females) between ages 18-83, 92% of whom were trauma-exposed, we report associations between PTSD and disrupted white matter organization measured by lower fractional anisotropy (FA) in the tapetum region of the corpus callosum (Cohen's d = -0.11, p = 0.0055). The tapetum connects the left and right hippocampus, for which structure and function have been consistently implicated in PTSD. Results were consistent even after accounting for the effects of multiple potentially confounding variables: childhood trauma exposure, comorbid depression, history of traumatic brain injury, current alcohol abuse or dependence, and current use of psychotropic medications. Our results show that PTSD may be associated with alterations in the broader hippocampal network.
  • Thumbnail Image
    ItemOpen Access
    Dimensions of deprivation and threat, psychopathology, and potential mediators: A multi-year longitudinal analysis.
    (Journal of abnormal psychology, 2018-02) Miller, Adam Bryant; Sheridan, Margaret A; Hanson, Jamie L; McLaughlin, Katie A; Bates, John E; Lansford, Jennifer E; Pettit, Gregory S; Dodge, Kenneth A
    Prior research demonstrates a link between exposure to childhood adversity and psychopathology later in development. However, work on mechanisms linking adversity to psychopathology fails to account for specificity in these pathways across different types of adversity. Here, we test a conceptual model that distinguishes deprivation and threat as distinct forms of childhood adversity with different pathways to psychopathology. Deprivation involves an absence of inputs from the environment, such as cognitive and social stimulation, that influence psychopathology by altering cognitive development, such as verbal abilities. Threat includes experiences involving harm or threat of harm that increase risk for psychopathology through disruptions in social-emotional processing. We test the prediction that deprivation, but not threat, increases risk for psychopathology through altered verbal abilities. Data were drawn from the Child Development Project (N = 585), which followed children for over a decade. We analyze data from assessment points at age 5, 6, 14, and 17 years. Mothers completed interviews at age 5 and 6 on exposure to threat and deprivation experiences. Youth verbal abilities were assessed at age 14. At age 17, mothers reported on child psychopathology. A path analysis model tested longitudinal paths to internalizing and externalizing problems from experiences of deprivation and threat. Consistent with predictions, deprivation was associated with risk for externalizing problems via effects on verbal abilities at age 14. Threat was associated longitudinally with both internalizing and externalizing problems, but these effects were not mediated by verbal abilities. Results suggest that unique developmental mechanisms link different forms of adversity with psychopathology. (PsycINFO Database Record