Abstract
According to the data of analysis of coherence indices of the frequency components of background EEGs of hard-of-hearing teenagers (12 to 15 years), the latter are characterized by a greater spatial regularity of delta- and theta-range oscillations in various cerebral cortex regions, as compared with the coherence in normal-hearing teenagers of the same age. This fact can be a manifestation of profound localization of generators structures initiating this slow-wave EEG activity. No clear focus of activity was found for the alpha range of hard-of-hearing teenagers; at the same time, considerable levels of coherence of alpha oscillations were observed in spatially remote cortical zones. This feature shows that the alpha-frequency activity can also be initiated, to a considerable extent, from one source localized in subcortical structures.
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