2020, Volume 14, Issue 1

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https://hdl.handle.net/20.500.13044/276

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Przeglądanie 2020, Volume 14, Issue 1 według Temat "alpha rhythm"
  • Rekord
    Changes in electroencephalogram (EEG) power during subdominant (left) hand finger movements in females with different alpha rhythm characteristics
    (Państwowa Szkoła Wyższa im. Papieża Jana Pawła II w Białej Podlaskiej, 2020-03-04) Morenko, Alevtyna ; Morenko, Olena ; Dmytrotsa, Olena ; Poruchynsky, Andriy ; Korzhyk, Olha
    Background. This study investigates the indicators of electroencephalographic (EEG) oscillatory activity and processes that are correlated with manual movements executed by the subdominant (left) hand in women with a high or a low individual α-frequency. Material and methods. 113 healthy right-handed women from the ages of 19 to 21 were divided randomly into two experimental groups with high (n = 59, IαF > 10.25 Hz) and low (n = 54, IαF ≤ 10.25 Hz) individual EEG α-frequency (IαF). EEG power during flexion or extension of the subdominant hand fingers was evaluated. Results. Manual movements performed by women, especially those exhibiting high modal α-frequency, were accompanied by reduced α and β power in mid and posterior cortical areas. These changes occurred in combination with a local power increase in α1-oscillations in the frontal leads. A local increase of α3-activity in the frontal cortex areas was also revealed in women with low IαF. In this same group of women, generalized increases in EEG power of θ-, β- and γ-oscillations were observed in the cortex. Conclusions. These results revealed a greater redundancy of brain processes in women with low IαF power compared to women with high α-frequency.