Abstract
The frontal midline Θ rhythm in the GO/NOGO paradigm was studied in a group of apparently healthy children at ages of 7–13 years. Calculated event-related synchronization in response to stimulus presentation in tests was used as an index of the phasic component, and the relative change in the EEG power in the Θ band (compared to the activity in the state of quiet wakefulness) in response to test performance was used as an index of the tonic component. Subjects were divided into two groups according to the characteristics of the baseline Θ activity. A statistically significant correlation between the phasic and tonic components of the Θ rhythm was found in the group of children characterized by the absence of the frontal midline Θ rhythm in the baseline EEG. No such correlation was found in the group of children characterized by a pronounced baseline Θ rhythm. The results testify to the functional heterogeneity of the phasic and tonic components of the human midline Θ rhythm.
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