Remotely Administered tDCS to Improve Cognitive Function in Veterans With mTBI and PTSD Principal Investigator

Inclusion Criteria: * History of chronic mTBI as measured by Ohio State University Traumatic Brain Injury Identification Method * mTBI occurred \> 5 years prior to study enrollment * History of PTSD with symptoms within the last month as confirmed PTSD Checklist (past month) score greater than or equal to 33, * Cognitive impairment as defined by telephone Montreal Cognitive Assessment \< 19 * No history of reported or documented age-related or neurodegenerative condition * Access to internet for 1 hour per day * Willing and able to comply with all study related procedures and capable of independently reading and understanding study materials and providing informed consent. Exclusion Criteria: * Skin lesions at the stimulation site that may increase conductance * Metallic objects in the face or head (e.g. braces, fillings, implants) * Pregnancy/lactation or planning to become pregnant during study * History of other significant neurological disorders including seizure disorder, central nervous system tumors, stroke, cerebral aneurysm * History of primary psychotic disorder, bipolar I disorder, active substance use disorder (moderate or greater, measured by Drug Abuse Screening Test-10) * Active suicidal intent or plan, measured by Columbia-Suicide Severity Rating Scale * Other conditions or circumstances that, in the opinion of investigator team, have the potential to prevent completion and/or have a confounding effect on outcome assessments. * Unable to tolerate 2mA transc…