[Study of fast rhythms and their variations using automatic analysis].

In two dispatching centers, 50 recordings were obtained from 14 workers. The recorded parameters were 2 EEG, 1 ECG, 1 EOG and 1 EMG; the whole day was covered by the various shifts. The results presented here are about the occipito-vertex EEG. After recording, a Fast Fourier Transform was done and the variations of the parameters beta1, beta2 and delta were analysed. Some periodicities are found during the night and the day. The variation of the high frequencies parameters is associated with the working constraints and the internal time-structure of the subject.