SYMMETRY AND STABILITY OF EEG SPECTRA IN HEALTHY SUBJECTS

  • 1 January 1976
    • journal article
    • research article
    • Vol. 26  (3) , 576-587
Abstract
Stability and symmetry of the power spectra and the EEG coherence function were investigated in 40 healthy subjects with different characteristics of cerebral electrical activity. The power spectra in all healthy subjects were characterized by a high degree of symmetry and stability. The average levels of coherence of the symmetric points of the right and left hemisphere was a reliable EEG characteristic of a healthy subject. The pattern of the coherence spectrum displayed considerable variability and non-stability. Subjects with a desynchronized EEG differed from those with .alpha.-rhythm predominance in having the highest coherence and similarity of spectra and a low stability in the anterior hemisphere, suggesting a high dynamic integration of the frontal systems.

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