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Objective:  Memory problems are frequently endorsed in Veterans following mild traumatic brain injury (mTBI), but subjective complaints are poorly associated with objective memory performance. Few studies have examined associations between subjective memory complaints and brain morphometry. We investigated whether self-reported memory problems were associated with objective memory performance and cortical thickness in Veterans with a history of mTBI.  Methods:  40 Veterans with a history of remote mTBI and 29 Veterans with no history of TBI completed the Prospective-Retrospective Memory Questionnaire (PRMQ), PTSD Checklist (PCL), California Verbal Learning Test-2nd edition (CVLT-II), and 3 T T1 structural magnetic resonance imaging. Cortical thickness was estimated in 14  a priori  frontal and temporal regions. Multiple regressions adjusting for age and PCL scores examined associations between PRMQ, CVLT-II scores, and cortical thickness within each Veteran group.  Results:  Greater subjective memory complaints on the PRMQ were associated with lower cortical thickness in the right middle temporal gyrus ( β  = 0.64,  q  = .004), right inferior temporal gyrus ( β  = 0.56,  q  = .014), right rostral middle frontal gyrus ( β  = 0.45,  q  = .046), and right rostral anterior cingulate gyrus ( β  = 0.58,  q  = .014) in the mTBI group but not the control group ( q ’s &gt; .05). These associations remained significant after adjusting for CVLT-II learning. CVLT-II performance was not associated with PRMQ score or cortical thickness in either group.  Conclusions:  Subjective memory complaints were associated with lower cortical thickness in right frontal and temporal regions, but not with objective memory performance, in Veterans with histories of mTBI. Subjective complaints post-mTBI may indicate underlying brain morphometry independently of objective cognitive testing.

Subjective memory complaints are associated with decreased cortical thickness in Veterans with histories of mild traumatic brain injury