Rehabilitation Through Virtual Immersion & Integrated Exposure for Mild Traumatic Brain Injury (ReVIVE for mTBI)

Inclusion criteria: * History of one or more concussions. * Presence of mild-to-moderate PTSD symptoms, defined as a score between 20 and 44 on the Davidson Trauma Scale (DTS), indicating clinically relevant but not severe symptomatology (Davidson et al., 1997). * Prior or ongoing therapy, defined as current or recent (within the last 3 months) engagement in standard care treatments such as psychiatric medication management, and evidence-based psychotherapy targeting mTBI or PTSD symptoms. * Prior U.S military service (any duration and any branch) is required for eligibility. Exclusion criteria: * Age over 55 to reduce confounding effects of age-related neurodegeneration and cognitive decline. * Diagnosis of severe psychiatric disorders (e.g., schizophrenia, bipolar disorder). * Active substance abuse. * Presence of unrelated neurological conditions such as epilepsy, stroke, seizure disorders, or neurodegenerative diseases (e.g., Alzheimer's, Parkinson's). * Significant cognitive impairment, assessed by standardized cognitive screening, which would interfere with the ability to participate fully in VR and therapy sessions. * Physical impairments that would prevent safe engagement in VR and therapy.