An adolescent was implied in a car accident in which he suffered a head trauma without any substantial loss of consciousness. The posttraumatic syndrome was characterized by headaches and mental symptoms: nervousness, feelings of depersonalization, impaired memory, difficulty in concentration. Neurological examination and laboratory tests have always been normal but for a large perduring asymmetry at the Cortical Auditory Evoked Response. This finding is commented in the light of a review of the literature and of some neuropsychological findings.
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