Time-Frequency Spectral Differences in Event-Related Potentials between Neurotic and Stable Persons in Human EEG

• Published in: Bioautomation Vol. 11; no. 1; pp. 57 - 64
• Main Authors: Georgiev, S, Minchev, Z, Philipova, D, Christova, C
• Format: Journal Article
• Language: English
• Published: Sophia Bulgarska Akademiya na Naukite / Bulgarian Academy of Sciences 01.12.2008; Academic Publishing House
• Subjects: EEG; Event Related Potentials; S-transform Power Spectrum Analysis; Spectrum analysis; Wavelet Power Spectrum Analysis
• ISSN: 1314-1902; 1313-261X; 1314-2321; 1312-451X

The aim of this work is to show how Wavelet and S-transform Power Spectrum Analysis could be used for detection of the time-frequency spectral differences in series of Event-Related Potentials recorded from neurotic and stable persons. We compared the EEG records in simple counting task condition of 30 healthy subjects divided in stable and neurotic groups according to there scores in neuroticism scale on Eysenck's Personality Questionnaire. Significant differences were found in the theta and alpha EEG bands. The stable persons are characterized with more prominent theta and less prominent alpha spectral power compared to the neurotic group. The application of complex decomposed functions for both Wavelet and S-transform Power Spectrum Analysis showed to be more useful for the discrimination between both groups of subjects.