Peculiarities of brain processes during the stop and switch of motor programs among women
Keywords: cerebral cortex, synchronization/desynchronization, manual movements, Stop-Signal paradigm, Stop-Change paradigm, women
AbstractThe purpose of the study is to establish differences in the cortical electrical activity among women under conditions of complete inhibition of a running motor program of manual movement (Stop-Signal paradigm) and under conditions of its inhibition, with subsequent switching to an alternative motor task (Stop-Change paradigm). We used the “event-related desynchronization/synchronization” (ERD/ERS) method. Indicators ERD and ERS were evaluated in the frequency range of EEG (1-35 Hz) in the frontal, central, and parietal leads. It was established that women demonstrated greater precision in conducting the task in the set with the Stop-Change paradigm than men. In both sets of the experiment, the predominance of ERS events in the range of α- and partially β1-activity of EEG is distinguished as a common regularity. Meanwhile, in different sets of the experiment, cortical electrical activity acquired certain specific features of the frequency-spatial organization that could indicate different brain processes during the response to Stop and Stop-Change stimuli. In the set of the use of the Stop-Change paradigm, a higher level of activation processes in the frontal, central, and parietal cortex areas in the EEG α- and β-activity range is generally showed among women.