Combat exposure, posttraumatic stress disorder, and head injuries differentially relate to alterations in cortical thickness in military Veterans

被引:34
作者
Clausen, Ashley N. [1 ,2 ]
Clarke, Emily [1 ,2 ]
Phillips, Rachel D. [1 ,2 ]
Haswell, Courtney [1 ,2 ]
Morey, Rajendra A. [1 ,2 ,3 ,4 ]
Brancu, Mira
Beckham, Jean C.
Calhoun, Patrick S.
Dedert, Eric
Elbogen, Eric B.
Fairbank, John A.
Hurley, Robin A.
Kilts, Jason D.
Kimbrel, Nathan A.
Kirby, Angela
Marx, Christine E.
McDonald, Scott D.
Moore, Scott D.
Morey, Rajendra A. [1 ,2 ,3 ,4 ]
Naylor, Jennifer C.
Rowland, Jared
Swinkels, Cindy
Szabo, Steven T.
Taber, Katherine H.
Tupler, Larry A.
Van Voorhees, Elizabeth E.
Wagner, H. Ryan
Yoash-Gantz, Ruth E.
机构
[1] Durham VAHCS, VA Midatlantic MIRECC, 508 Fulton St, Durham, NC 27705 USA
[2] Duke Univ, Duke UNC Brain Imaging & Anal Ctr, Durham, NC 27708 USA
[3] Duke Univ, Ctr Cognit Neurosci, Durham, NC USA
[4] Duke Univ, Dept Psychiat & Behav Sci, Durham, NC USA
关键词
TRAUMATIC BRAIN-INJURY; NORMAL OLDER-ADULTS; NEURAL SYSTEMS; PTSD; IRAQ; DEPLOYMENT; ARMY; CONNECTIVITY; AFGHANISTAN; HEALTH;
D O I
10.1038/s41386-019-0539-9
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
Combat-exposed Veterans are at increased risk for developing psychological distress, mood disorders, and trauma and stressor-related disorders. Trauma and mood disorders have been linked to alterations in brain volume, function, and connectivity. However, far less is known about the effects of combat exposure on brain health. The present study examined the relationship between severity of combat exposure and cortical thickness. Post-9/11 Veterans (N = 337; 80% male) were assessed with structural neuroimaging and clinically for combat exposure, depressive symptoms, prior head injury, and posttraumatic stress disorder (PTSD). Vertex-wide cortical thickness was estimated using FreeSurfer autosegmentation. FreeSurfer's Qdec was used to examine relationship between combat exposure, PTSD, and prior head injuries on cortical thickness (Monte Carlo corrected for multiple comparisons, vertex-wise cluster threshold of 1.3, p < 0.01). Covariates included age, sex, education, depressive symptoms, nonmilitary trauma, alcohol use, and prior head injury. Higher combat exposure uniquely related to lower cortical thickness in the left prefrontal lobe and increased cortical thickness in the left middle and inferior temporal lobe; whereas PTSD negatively related to cortical thickness in the right fusiform. Head injuries related to increased cortical thickness in the bilateral medial prefrontal cortex. Combat exposure uniquely contributes to lower cortical thickness in regions implicated in executive functioning, attention, and memory after accounting for the effects of PTSD and prior head injury. Our results highlight the importance of examining effects of stress and trauma exposure on neural health in addition to the circumscribed effects of specific syndromal pathology.
引用
收藏
页码:491 / 498
页数:8
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