Diagnostic criteria and differential diagnosis of mild traumatic brain injury.

Brain injury is classified clinically as severe, moderate or mild brain injury characteristics, including admission Glasgow coma score, duration of unconsciousness and post-traumatic amnesia and any focal neurological findings. Most traumatic brain injuries are classified as mild traumatic brain injury (MTBI). Headache, nausea and dizziness are frequent symptoms after MTBI and may continue for weeks to months after the trauma. MTBI may also be complicated by intracranial injuries. Experimental animal models and post-mortem studies have shown axonal damage and dysfunction in MTBI. This damage is mostly localized in the frontal lobes. Serum S-100 and NSE have been reported to be markers for the seventy of brain damage. In the literature, indications for radiodiagnostic evaluation following MTBI have been the subject of debate. Radiographs of the skull are used to exclude skull fractures, but are not useful for an evaluation of brain injury. Computed tomography of the brain seems to be the best way to exclude the development of relevant intracranial lesions. MTBI has a good clinical outcome, although a substantial group of patients develop post-concussional complaints (PCC). There is little information on the effectiveness of various methods suggested for reducing the frequency of PCC.

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