[The functional role of neocortical gamma activity in the process of interrelations between different areas]

In the context of understanding of the mechanisms of cognitive human accounting functional role in these processes of neocortical gamma activity, the science progress of the 21st century at least three new logically related directions are outstanding to: 1) combination with intracranial recordings by functional magnetic resonance imaging (fMRI) has indicated a closely correlation between the level of power of high gamma-band (90-150 Hz) at corresponding localization and the level of blood oxygenation (responses BOLD; blood oxygenation level dependent), which provides an estimate of the dynamics of power in aspect of metabolic resources; 2) results parallel evaluation of parameters gamma activity (frequency, bandwidth, amplitude) in combination with the size of BOLD responses and the GABA concentration as measured by magnetic resonance spectroscopy, formed the basis of hypothesis about the individual peculiarities (specific features) of the subject (trait); 3) new methods of measuring the phase synchrony of gamma frequencies has created the phenomenon of cross-frequency interaction (cross-frequency coupling, CFC) between phases of gamma oscillations with theta, alpha waves. This phenomenon is considered by some authors as the basis of interrelations of different separated networks, possibly providing approach to understanding of various aspects of defining the mechanisms of cognitive processes.