Behavioral and Neuroimaging Changes After Cognitive Rehab in Traumatic Brain Injuries (TBI) and Mild Cognitive Impairment (MCI)

Inclusion Criteria: General inclusion criteria (all patients): * A minimum of 12 years of education or attainment of a Graduation Equivalency Diploma; * All medications stable for approximately 3 months; * No history of severe mental illness; * No current untreated alcohol or substance abuse/dependence; * English as native and preferred language; * MRI-compatible if taking part in fMRI studies 7) Able to give informed consent. MCI Inclusion Criteria: * Diagnosis of amnestic MCI based on criteria set forth by Petersen (2004). Additionally, other potential causes of cognitive deficit ruled out by the referring physician; * 55 years of age or older. TBI Inclusion criteria: * History of a mild to moderate TBI; * No history of other neurological disease or injury; * A minimum of 6 months and maximum of 5 years post-onset of TBI; * 18 - 45 years old. Exclusion Criteria: * History of neurological disease or injury (other than TBI) * History of severe mental illness * Current untreated alcohol or substance abuse * Other conditions may exclude; please discuss with contact