OTHER / RESEARCH PAPER
CHANGES IN ELECTROENCEPHALOGRAM (EEG) POWER DURING SUBDOMINANT (LEFT) HAND FINGER MOVEMENTS IN FEMALES WITH DIFFERENT ALPHA RHYTHM CHARACTERISTICS
1
Faculty of Medicine and Biology, Lesya Ukrainka Eastern European National University, Lutsk, Ukraine
2
Faculty of Medicine, Charles University, Prague, the Czech Republic
Submission date: 2019-09-21
Acceptance date: 2020-02-10
Publication date: 2020-03-04
Health Prob Civil. 2020;14(1):63-69
KEYWORDS
TOPICS
ABSTRACT
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.
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.
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