Usefulness of Biomarkers in the Management of Mild Traumatic Brain Injury in Adults (Biotraumap)

Inclusion Criteria: * Male and female patient, major * Patient admitted to the Emergency Department for mTBI, with a medium risk of intracranial lesions according to the SFMU (French Emergency Medicine Society) criteria, for which an S100B protein assay is indicated: * GCS score of 15 with at least one associated risk factor: amnesia facts more than 30 minutes before the mTBI loss of consciousness, anti platelet aggregating agent * Time between mTBI and blood draw (for the S100B protein assay) less than 3 hours. * Patient covered by a Social Security scheme. Exclusion Criteria: * Patient classified in the high risk group of intracranial lesions according to SFMU criteria : * GCS score less than 15, 2 hours after the trauma * Focused neurological deficit * Post-traumatic convulsion * Suspicion of open fracture of the skull or embarrassment * Any sign of fracture of the base of the skull (hemotympanum, bilateral periorbital bruise, otorrhea or rhinorrhea of cerebrospinal fluid) * Treatment with anticoagulants * More than one episode of vomiting. * Patient classified in the group at low risk of intracranial lesions according to the SFMU criteria, presenting a GCS score of 15 without any criteria for moderate or high risk groups of intracranial lesions. * Patient consulting for moderate or severe head trauma (GCS score less than 13). * Refusal of the patient (signature of the opposition form).