Abstract
In this study, the amplitude frequency characteristics, which are obtained by application of Fourier transform to the selectively averaged evoked potentials (SAEPs) recorded from human vertex and occipital scalp electrodes upon acoustical step stimulation, are given and discussed. The resonance phenomena which we have observed in the cat brain are also demonstrated in humans by comparing the components of the single EPs with those of the spontaneous activity (EEG) just preceding the stimulus and by using the concept of amplification factor which we have recently introduced. Besides other types, special emphasis is given to the resonance phenomena in the alpha frequency range (alpha resonances). Various forms of alpha resonances are described and quantitatively demonstrated by using the data recorded during closed-eye and open-eye experiments on eight subjects. A strong resonance phenomenon is also noted in the 2–9 Hz frequency range.
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Supported by Grant No. TAG-345 of the Scientific and Technical Research Council of Turkey
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Başar, E., Gönder, A. & Ungan, P. Important relation between EEG and brain evoked potentials. Biol. Cybernetics 25, 41–48 (1976). https://doi.org/10.1007/BF00337047
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DOI: https://doi.org/10.1007/BF00337047