Relationships between the flexibility of cognitive performance and the α-rhythm response to conditioning stimuli

Changes in Electroencephalogram (Eeg) Power During Subdominant (Left) Hand Finger Movements in Females With Different Alpha Rhythm Characteristics

“…According to Ioffe [1], in the course of MMs performed with the subdominant hand, such descending inhibitory influences generally prevent motor programming. Kostandov et al [30] reported they may indicate that processes of plasticity reduced motor programming in our experiment if they were performed by women with low IαF, particularly with their unresponsive hand, and a need to observe the specified tempo. Some β-and γ-activity intensively increased in the cortex was nonspecific.…”

“…The observation of increasing capacity measures for θ-, α3-, β-and γ-waves were more generalized (with p ≤ 0.05 to p ≤ 0.01) ( Figure 2). Typical power increases of α3-waves in the frontal area (r ≤ 0.05) found in women with a low IαF is suggestive of an additional selective inhibition mechanism of the sensory input [1,30] during motor programming. From a functional point of view, these results allow for the elucidation of a pattern -an EEG-correlate of the process comparing the afferent information flows with the new parameters from muscle activities, characterized by the top-down effects of the frontal cortex, with the previous motor program.…”

“…Any execution of MM by means of the subdominant (left) hand was accompanied by higher EEG power in the cerebral cortex of women with low IαF versus women with high α-frequency (p ≤ 0.05 to p ≤ 0.01) ( Figure 3). According to Kostandov et al [30] such differences may indicate a predominance of non-specific cortical activities.…”