We have presented 38 EEG studies of healthy adult subjects with well developed alpha-rhythm, who participated in training with imaging different stimuli. We revealed in the first seconds of imaging stimulus different reactivity of alpha-rhythm which correlated with feelings of the subjects in 93% of cases. The strongest alpha-rhythm depression was seen in the left hemisphere to visual stimuli, then less to hearing stimuli, smell stimuli, touch stimuli, and warming imaging stimuli. Weak reaction was found for heart beat, imaging, heaviness, and cold. This EEG data could be used before biofeedback training to choose the best modality for self-regulation.
The EEGs from 80 healthy subjects of wide-ranging age, 48 athletes, and 20 neurotic patients complaining of anxiety were compared. All subjects had a well-developed alpha-rhythm. Subjects were instructed to close their eyes and to imagine various stimuli. After eye closure, the so-called "exhaustion of the alpha-rhythm" occurred in the majority of patients (75%) and in the majority of healthy elderly subjects (52%), but was absent in all athletes. Suppression of alpha-rhythm in response to the visual stimulus was better marked than the suppression in response to imaging the stimulus of accelerated heart beat for all subjects. In one patient, sharp waves and pulse artifacts that could not be removed were registered in the anterior leads 5 days before a myocardial infarct.
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