[Changes of the alpha-rhythm after introducing stimuli Go/NoGo in the context of experiments with a set to an angry face].

At healthy adults is (n = 35) in the middle of 16 second pauses between target (faces) and starting stimuli conditioning signals Go/NoGo. Lack of essential changes of flexibility of the set after introduction of an additional cognitive task is explained by enhansment of the induced synchronization of an alpha rhythm in time intervals between target, conditioning and starting stimuli. The increase of alpha potentials synchronization reflect the top-down inhibitory control suppressing effect of irrelevant factors, and that facilitating processing of significant information. In the range of time between NoGo and starting stimuli locally in a motor zone of cortex of only the left hemisphere (C3, FC3) the induced synchronization of low-frequency and especially high-frequency alpha rhythm is registered. One more experimental confirmation of the theory on the brake nature of this electrophysiological phenomenon is obtained. Used in physiology of the highest nervous activity of concept about internal or conditional inhibition is considered within the theory of top-down inhibitory control from prefrontal cortex.