Aims: 

Such cognitive reactions, as attention and memory cause depression of low-frequency subrange of alpha-rhythm. The purpose of the investigation was to check up the changes of dominant frequency and spectral power of alpha range during the praxis concerned with cognitive activity and memory processes.

Methods: 

By the method of electro-encephalography (EEG) were inspected 32 volunteers in age from 18 to 24 years. We registered their EEG in a state of vigil at implementation of cognitive exercises of related to memory.

Results: 

Sharply expressed alterations of rhythmic structure of alpha range do not take place, although there was its depression – sufficiently clear sentinel oppression in reply to the cognitive exercises. It shows up in the substantial decline of spectral power of alpha-rhythm during memorizing of words, during their maintenance in memory, and in transition of inspected person to afterwork rest relative to starting data.

Conclusion: 

During activating of brain, which is related to the mechanisms of memory, does not take place complete disappearance of alpha-rhythm. Dominant frequency of range of alpha does not change here. There is sufficiently the substantial decline of spectral power of dominant frequency of alpha range during realization of such cognitive functions as memory and attention.