[Value of quantitative serial EEG analysis during supervision of evolutive cerebral diseases (author's transl)]

The authors emphasize the value of quantitative EEG analysis in patients with acute or subacute evolutive diseases, who have undergone serial EEG records. On the basis of the power spectra, the topographical distribution of the different frequency components and their changes during disease evolution, it is shown (by 142 investigations in 44 patients with various evolutive cerebral diseases) that these analyses (with their immediately interpretable histographic representation) are able: (1) to follow the step-by-step evolution of the disease and to apprehend the (favourable or unfavourable) evolutive tendencies of the cerebral process in a condensed form and often before the appearance of typical clinical and electroencephalographic disturbances; (2) to note a focalisation or lateralisation which does not always clearly appear with the clinical or conventional electroencephalographic data.