Inclusion Criteria:  I am between the ages of 18 and 65. I have been diagnosed with a TBI. I am an individual without TBI. I am right-handed. I have normal vision or corrected to normal vision. I can read and speak English fluently. I do or do not have a current diagnosis of Depression. I am not currently pregnant.  Exclusion Criteria:  I have had a neurological disease, other than TBI. I have a significant history of alcohol or drug abuse as determined by study staff. I have metal in my body (shrapnel, piercing that cannot be taken off, retainer on the upper jaw). I have something in my body that restricts me from having an MRI such as: an aneurysm clip; implanted neural stimulator; implanted cardiac pacemaker or auto-defibrillator; cochlear implant (internal hearing aids); ocular foreign body (e.g. metal shavings in my eye), insulin pump or any pre- existing eye conditions (such as blurry vision, seeing double, and abnormal eye movements). I experience discomfort in closed spaces (claustrophobia). I have been diagnosed with a neurologic illness such as epilepsy, brain tumors, etc. (e.g. schizophrenia and bipolar disorder). I have had corticosteroid treatment less than a month ago as determined by study staff review of my medications. I have been informed by my doctor that is it unsafe for me to receive regular MRI as part of my medical care.