The Role of High-frequency Electrical Brain Activity in the Realization of Psychological Processes

The article discusses the mechanism concerning generation of gammaoscillations. Latest researches demonstrate that gammaoscillations participate in the realization of different psychological processes, including enhancing attention and changing functional states, perception and working memory, processes of recognition and identification, awareness and semantic operations. The author discusses two hypotheses on the origin of gammarhythm: pacemaker and binding. To analyse the problem, the author suggests a special method based on the narrow frequency filtering the socalled evoked gammarhythm, localization of their dipole sources over the structural MRI data. The obtained results are compatible with the pacemaker hypothesis.