| 摘要 |
FIELD: medicine.SUBSTANCE: invention relates to medicine. Electroencephalogram (EEG) is registered in background mode, spectrograms are calculated by means of wavelet conversion with Morlet mother function. Frequency ranges of leading EEG rhythms are determined by finding values of coordinate minimums by frequency of envelope projections of wavelet spectrograms on "amplitude-frequency" coordinate plane. In frequency ranges times Tof spectrogram peak appearance are determined by values of positions of maximums on envelope projection of wavelet spectrograms. Frequencies Fand amplitudes Aof peaks of spectrograms, which correspond to values of times of their appearance in each frequency range, are determined. For each discretisation window with ?T, ?F parameters, obtained by fragmentation of duration T and frequency range F of EEG registration, values ?Aof sums of amplitudes of spectrogram peaks are calculated. If frequency increases, range of frequencies of peaks expands, interhemispheric asymmetry of electric activity is detected, early stage of Parkinson disease is diagnosed.EFFECT: method makes it possible to increase reliability of determination of early stage of PD.4 cl, 9 dwg, 1 ex |
