{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,11,3]],"date-time":"2026-11-03T13:21:46Z","timestamp":1793712106014,"version":"4.6.1"},"reference-count":87,"publisher":"SAGE Publications","license":[{"start":{"date-parts":[[2026,4,7]],"date-time":"2026-04-07T00:00:00Z","timestamp":1775520000000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"funder":[{"DOI":"10.13039\/100000738","name":"U.S. Department of Veterans Affairs","doi-asserted-by":"crossref","award":["I01 CX002293"],"award-info":[{"award-number":["I01 CX002293"]}],"id":[{"id":"10.13039\/100000738","id-type":"DOI","asserted-by":"crossref"}]}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Journal of Neurotrauma"],"abstract":"<jats:p>\n                    Mild traumatic brain injury (mTBI), a common health burden among combat veterans, has been associated with alterations in brain structure. Moreover, post-traumatic stress disorder (PTSD), frequently comorbid with mTBI, is linked to smaller cerebellum volumes; however, little is known about whether mTBI (absent comorbid psychiatric symptoms) similarly affects cerebellar structure. The cerebellum may play a central role in common postconcussive symptoms due to its contributions to cognitive and emotional functions. In a sample of 122 combat veterans, we examined whether total cerebellum volumes differed among those with a remote history of mTBI with (\n                    <jats:italic toggle=\"yes\">n<\/jats:italic>\n                    = 29) or without (\n                    <jats:italic toggle=\"yes\">n<\/jats:italic>\n                    = 42) comorbid PTSD and healthy controls (\n                    <jats:italic toggle=\"yes\">n<\/jats:italic>\n                    = 51). An automated cerebellum parcellation protocol was applied to T1-weighted anatomical scans to derive volumetric estimates of the cerebellum (and 28 subregions). Hierarchical regression analysis (adjusting for total intracranial volume, age, sex, and combat exposure) revealed that, compared with controls, participants with comorbid mTBI-PTSD had a significantly smaller volume of the total cerebellum (\n                    <jats:italic toggle=\"yes\">p<\/jats:italic>\n                    = 0.010). There was no significant effect of mTBI-only on total cerebellum volume (\n                    <jats:italic toggle=\"yes\">p<\/jats:italic>\n                    = 0.165). Follow-up exploratory analyses of subregional cerebellum volume differences suggested that volume differences in comorbid mTBI-PTSD were primarily localized to the posterior lobe (crus I, lobules VIIB, VIIIB). In sum, in a sample of combat veterans, mTBI was associated with a smaller volume of the cerebellum, but only when comorbid with PTSD. Consistent with recent work, exploratory subregional analyses indicated that volume differences were primarily attributable to regions of the cerebellum most prominently involved in cognition and emotion. These results underscore the profound effects of PTSD on brain health in military veterans and suggest that mTBI may not produce long-lasting structural damage to the cerebellum. Future work is needed, as it remains possible that subtle cerebellar volume changes may emerge in specific subgroups or as a function of injury-related factors (e.g., mechanism of injury, time since injury) not fully captured in the present study.\n                  <\/jats:p>","DOI":"10.1177\/08977151261438986","type":"journal-article","created":{"date-parts":[[2026,4,7]],"date-time":"2026-04-07T09:10:37Z","timestamp":1775553037000},"update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":1,"title":["Cerebellar Volumes Are Smaller in Veterans with PTSD and a History of Mild Traumatic Brain Injury, but Not Mild Traumatic Brain Injury Alone"],"prefix":"10.1177","author":[{"given":"Ashley A.","family":"Huggins","sequence":"first","affiliation":[{"name":"Department of Psychology, University of Arizona, Tucson, Arizona, USA."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Brandy S.","family":"Martinez","sequence":"additional","affiliation":[{"name":"Mid-Atlantic Mental Illness Research, Education, and Clinical Center, Durham VA Health Care System, Durham, North Carolina, USA."},{"name":"Brain Imaging and Analysis Center, Duke University, Durham, North Carolina, USA."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"C. Lexi","family":"Baird","sequence":"additional","affiliation":[{"name":"Mid-Atlantic Mental Illness Research, Education, and Clinical Center, Durham VA Health Care System, Durham, North Carolina, USA."},{"name":"Brain Imaging and Analysis Center, Duke University, Durham, North Carolina, USA."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ahmed","family":"Hussain","sequence":"additional","affiliation":[{"name":"Mid-Atlantic Mental Illness Research, Education, and Clinical Center, Durham VA Health Care System, Durham, North Carolina, USA."},{"name":"Brain Imaging and Analysis Center, Duke University, Durham, North Carolina, USA."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ashley N.","family":"Clausen","sequence":"additional","affiliation":[{"name":"Behavioral Health Specialists, St. Luke\u2019s Health System, Kansas City, Missouri, USA."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Courtney C.","family":"Haswell","sequence":"additional","affiliation":[{"name":"Mid-Atlantic Mental Illness Research, Education, and Clinical Center, Durham VA Health Care System, Durham, North Carolina, USA."},{"name":"Brain Imaging and Analysis Center, Duke University, Durham, North Carolina, USA."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rajendra A.","family":"Morey","sequence":"additional","affiliation":[{"name":"Mid-Atlantic Mental Illness Research, Education, and Clinical Center, Durham VA Health Care System, Durham, North Carolina, USA."},{"name":"Brain Imaging and Analysis Center, Duke University, Durham, North Carolina, USA."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"name":"VA Mid-Atlantic MIRECC Workgroup","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2026,4,7]]},"reference":[{"key":"e_1_3_5_2_2","doi-asserted-by":"publisher","DOI":"10.1037\/a0025462"},{"key":"e_1_3_5_3_2","doi-asserted-by":"publisher","DOI":"10.1176\/appi.ajp.2015.14121572"},{"key":"e_1_3_5_4_2","doi-asserted-by":"publisher","DOI":"10.1080\/13854040903074652"},{"key":"e_1_3_5_5_2","doi-asserted-by":"publisher","DOI":"10.1371\/journal.pone.0174847"},{"key":"e_1_3_5_6_2","doi-asserted-by":"publisher","DOI":"10.1212\/WNL.0000000000200041"},{"key":"e_1_3_5_7_2","doi-asserted-by":"publisher","DOI":"10.1001\/jamapsychiatry.2013.3080"},{"key":"e_1_3_5_8_2","doi-asserted-by":"publisher","DOI":"10.1001\/archpsyc.61.1.42"},{"key":"e_1_3_5_9_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.psc.2013.12.001"},{"key":"e_1_3_5_10_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.biopsych.2021.09.024"},{"key":"e_1_3_5_11_2","doi-asserted-by":"publisher","DOI":"10.1002\/hbm.25811"},{"key":"e_1_3_5_12_2","doi-asserted-by":"publisher","DOI":"10.1097\/HTR.0000000000000559"},{"key":"e_1_3_5_13_2","doi-asserted-by":"publisher","DOI":"10.1002\/hbm.22117"},{"key":"e_1_3_5_14_2","doi-asserted-by":"publisher","DOI":"10.1038\/s41386-019-0539-9"},{"key":"e_1_3_5_15_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.nlm.2019.01.004"},{"key":"e_1_3_5_16_2","doi-asserted-by":"publisher","DOI":"10.1007\/s12311-016-0815-8"},{"key":"e_1_3_5_17_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.neulet.2018.07.005"},{"key":"e_1_3_5_18_2","doi-asserted-by":"publisher","DOI":"10.1093\/brain\/awh729"},{"key":"e_1_3_5_19_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.cortex.2009.06.009"},{"key":"e_1_3_5_20_2","doi-asserted-by":"publisher","DOI":"10.1002\/cne.21974"},{"key":"e_1_3_5_21_2","doi-asserted-by":"publisher","DOI":"10.1016\/B978-0-444-63956-1.00005-9"},{"key":"e_1_3_5_22_2","doi-asserted-by":"publisher","DOI":"10.1093\/cercor\/bhab260"},{"key":"e_1_3_5_23_2","doi-asserted-by":"publisher","DOI":"10.1093\/scan\/nsaa076"},{"key":"e_1_3_5_24_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.cortex.2009.11.008"},{"key":"e_1_3_5_25_2","doi-asserted-by":"publisher","DOI":"10.1146\/annurev-neuro-070918-050258"},{"key":"e_1_3_5_26_2","doi-asserted-by":"publisher","DOI":"10.1080\/14734220500348584"},{"key":"e_1_3_5_27_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.neuroimage.2008.04.254"},{"key":"e_1_3_5_28_2","doi-asserted-by":"publisher","DOI":"10.1093\/brain\/awx354"},{"issue":"1","key":"e_1_3_5_29_2","doi-asserted-by":"crossref","first-page":"189","DOI":"10.1093\/brain\/awh352","article-title":"Cognitive sequelae of head injury: Involvement of basal forebrain and associated structures","volume":"128","author":"Salmond CH","year":"2005","unstructured":"Salmond CH, , Chatfield DA, , Menon DK, et al. 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