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In patients after craniocerebral trauma 24-hour EEG and routine EEG records were obtained. 44 cases were studied between 6 and 38 days after trauma and 45 cases were examined between 6 and 12 months after trauma. The diagnosis of brain commotion in early phase based on neurological examination and computed tomography was made in 22 cases, while in 22 cases late posttraumatic phase was diagnosed. Brain contusion in early and late phase was diagnosed in 22 and 23 cases, respectively. Early after craniocerebral trauma the study demonstrated changes in routine EEG in 8 cases (18.1%), while 24-hour EEG demonstrated them in 26 cases (59.0%), that is three times more as frequently. Changes in 24-hour EEG were found nearly twice as frequently than in routine EEG 6-12 months after trauma (51.0% and 28.9% respectively). In patients with brain commotion in the first week after trauma only 24-hours EEG revealed changes. Late after trauma 24-hour EEG could demonstrate seizure activity more frequently than routine EEG.
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