A new method of presentation of the average spectral properties of the EEG time series.
In framework of the AR model the transfer function and the impulse response function of the EEG time series were found. The parameters of the impulse response function were interpreted in terms of: frequencies, damping factors and amplitudes of the hypothetical brain rhythm generators. The method of the rhythm diagrams was proposed to describe the spectral properties of the EEG time series. It makes possible the accurate estimation of the EEG rhythm's frequencies and their intensities, especially weak components hardly visible in the conventional spectral analysis are well distinguished. Rhythm diagrams can be a useful tool in the clinical applications and offer new possibilities in the direct comparison of the results of modeling with the experimental data.
Blinowska
K J
KJ
Medical Physics Laboratory, Warsaw University, Poland.
Franaszczuk
P J
PJ
Mitraszewski
P
P
D000818:Animals; D001921:Brain / Q000502:physiology; D004569:Electroencephalography / Q000379:methods*; D005583:Fourier Analysis; D011817:Rabbits; D012044:Regression Analysis; D012815:Signal Processing, Computer-Assisted; D013997:Time Factors