In France, the incidence of head injuries is estimated at 100,000 per year in France. 80% of mild head trauma. This is a pattern of frequent use of the health system. The reason for consultation, benign appearance, present a significant risk of complication. In 15 to 25% of the evolution of head injury is unfavorable. Disorders of attention, memory disorders, psychiatric events and mood changes may occur. These symptoms are grouped into a syndrome, post-concussion syndrome.