The report deals with the changes of brain functions in the course of traumatic apallic syndrome (TAS) by means of the EEG examination, in the classical way, and by computer analysis as well. The development of EEG changes during individual stages of the TAS is studied. The EEG examination was performed repeatedly in 35 patients from the first days up to several years after injury. As for EEG findings as a possible prognostic index, the authors find that a gradual increase of frequency from delta to theta and alpha zones can be considered a favourable prognostic.