This application seeks to identify cognitive and neurobiological markers of risk for posttraumatic stress disorder (PTSD) and/or major depressive disorder (MDD) in the acute aftermath of trauma. In addition, a plan is outlined for the candidate to acquire the necessary training to develop an independent program of research focused on understanding markers and mechanisms of risk for PTSD and MDD. The candidate's prior training in life stress, mood disorders and PTSD research has allowed him to hone many skills necessary for achieving this goal. However, he requires additional training, mentoring and experience in five key areas: (1) diurnal sympathetic nervous system (SNS) and hypothalamic-pituitary-adrenal (HPA) activity;(2) SNS and HPA reactivity to stress;(3) neurobiological risk markers for PTSD;(4) cognitive risk factors for PTSD and MDD;and (5) longitudinal designs to study coping and neuroendocrine trajectories for the onset and course of PTSD and/or MDD. A comprehensive training plain has been developed that includes hands-on didactic experiences, formal coursework, independent readings, seminars, webinars, mentoring meetings and consultation with experts in these five key areas. The proposed study will investigate longitudinal pathways leading from interpersonal violence (IPV) exposure to PTSD and/or MDD in a sample of 60 women recently exposed to IPV and 40 non-exposed women using four waves of data collection (within 1 month after exposure to IPV, and at 1, 3, and 6 months following the initial assessment). Although women are twice as likely as men to develop PTSD and/or MDD after exposure to trauma, the mechanisms underlying this increased risk remain unclear. Identifying individuals at elevated risk for these disorders is critical for developing effective early intervention programs. The HPA and SNS systems serve as main lines of defense in responding to stress or trauma. Individuals who develop PTSD have reduced activity in the HPA system and increased activity in the SNS following trauma. Cross-sectional studies suggest that a progressive divergence of HPA and SNS activity following trauma may contribute to the maintenance of PTSD, but there is scant longitudinal research to support this hypothesis. Although PTSD and MDD frequently co-occur, the role of MDD symptoms in the patterns of HPA and SNS function following trauma-exposure has not yet been described. The primary aims of the proposed study are to (a) examine whether a progressive divergence in SNS and HPA daily output is associated with higher levels of PTSD symptoms over time, and (b) to determine whether women at greater risk for PTSD fail to habituate in terms of their cortisol responses to a psychosocial stress task. Secondary goals will examine the role of co-occurring MDD symptoms on diurnal secretion and reactivity of HPA/SNS systems. Psychosocial factors such as coping strategies may also determine the risk for PTSD and/or MDD and may influence SNS/HPA function. Results will identify cognitive and neurobiological factors associated with risk for PTSD and/or MDD that could be used to develop more "personalized" early intervention programs.
Violence against women is a major social problem and is associated with poor performance in school and work, and increased risk for emotional and behavioral problems. Women are twice as likely as men to develop posttraumatic stress disorder (PTSD) following a traumatic event;however, the mechanisms underlying this elevated risk remain unclear. The proposed study will assess coping skills and stress responses repeatedly over a 6-month period in women who have recently experienced interpersonal violence to identify individual differences in risk factors for PTSD that could be used to develop more effective early treatment programs.
|Morris, Matthew C; Hellman, Natalie; Abelson, James L et al. (2016) Cortisol, heart rate, and blood pressure as early markers of PTSD risk: A systematic review and meta-analysis. Clin Psychol Rev 49:79-91|
|Kouros, Chrystyna D; Morris, Matthew C; Garber, Judy (2016) Within-Person Changes in Individual Symptoms of Depression Predict Subsequent Depressive Episodes in Adolescents: a Prospective Study. J Abnorm Child Psychol 44:483-94|
|Morris, Matthew C; Mielock, Alyssa S; Rao, Uma (2016) Salivary stress biomarkers of recent nicotine use and dependence. Am J Drug Alcohol Abuse 42:640-648|
|Morris, Matthew C; Walker, Lynn S; Bruehl, Stephen et al. (2016) Impaired conditioned pain modulation in youth with functional abdominal pain. Pain 157:2375-81|
|Morris, Matthew C; Walker, Lynn; Bruehl, Stephen et al. (2015) Race Effects on Conditioned Pain Modulation in Youth. J Pain 16:873-80|
|Hellman, Natalie; Morris, Matthew C; Rao, Uma et al. (2015) Depression history as a moderator of relations between cortisol and shame responses to social-evaluative threat in young adults. Biol Psychol 109:159-65|
|Sherman, Amanda L; Morris, Matthew C; Bruehl, Stephen et al. (2015) Heightened Temporal Summation of Pain in Patients with Functional Gastrointestinal Disorders and History of Trauma. Ann Behav Med 49:785-92|
|Morris, Matthew C; Walker, Lynn; Bruehl, Stephen et al. (2015) Race effects on temporal summation to heat pain in youth. Pain 156:917-22|
|Morris, Matthew C; Evans, Lindsay D; Rao, Uma et al. (2015) Executive function moderates the relation between coping and depressive symptoms. Anxiety Stress Coping 28:31-49|
|Morris, Matthew C; Kouros, Chrystyna D; Fox, Kathryn R et al. (2014) Interactive models of depression vulnerability: the role of childhood trauma, dysfunctional attitudes, and coping. Br J Clin Psychol 53:245-63|
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