CHARACTERIZATION OF TOPOGRAPHIC EEG CHANGES WHEN SMOKING A CIGARETTE

The acute effects of cigarette smoking on the human electroencephalogr am (EEG) were investigated by the topographic mapping technique. Twent y-six subjects participated in this study, which involved sham smoking and real smoking of preferred cigarettes. Effects of smoking were ana lyzed by statistical and multivariate analysis. Analysis of variance a nd t-test results showed a significant decrease in the theta and alpha , bands but a significant increase in the alpha(2), beta(1), and beta( 2) bands. Factor analysis and cluster analysis showed that there were two or three independent regions on the scalp that indicate the effect s of smoking on topographic EEG. A hypothesis was formed that smoking has different effects on human EEG profiles for different brain region s and that there are individual variations in the EEG responses to smo king.