Objective Brain Function Assessment of mTBI/Concussion in High School Athletes

Inclusion Criteria: * Concussion-Injury subjects will be defined as follows: Any player who, based on independent clinical impression, is suspected of having suffered a concussion of any severity level, and on whom a routine clinical examination for concussion or head injury would have been conducted prior to implementation of this research protocol according to current standard practice. 1. If loss of consciousness, total duration less than \<20 minutes 2. No evidence of abnormality visible on Computerized Tomography (CT) of the head related to the traumatic event (Note: neuroimaging is not required for enrollment) 3. No hospital admission due to either head injury or collateral injuries for \>24 hours. 4. GCS between 13-15 Exclusion Criteria: 1. Do not speak or read English 2. Current CNS active prescription medications, with the exception of medications being taken for the treatment of Attention Deficit Disorder (ADD) 3. Skull abnormalities, e.g. metal plate 4. History of brain surgery or neurological disease 5. Pregnant women.