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The influence of traumatic brain lesion on sleep architecture.

The authors deal with sleep changes in patients after brain injury. Ten patients were examined with the use of daytime routine EEG and night polysomnography. The amount of REM sleep is most sensitive to brain damage and is reduced in all patients with nonspecific epileptiform changes in the EEG. Changes in deep synchronous sleep are less frequent and are not in correlation with the prevalence of epileptiform changes. Thus the reduction of REM sleep seems to be a sensitive marker of development of epileptiform EEG-changes and perhaps could play a predictive role of development of post-traumatic epilepsy.