eISSN: 2354-0265
ISSN: 2353-6942
Health Problems of Civilization Physical activity: diseases and issues recognised by the WHO
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1/2020
vol. 14
 
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abstract:
Original paper

CHANGES IN ELECTROENCEPHALOGRAM (EEG) POWER DURING SUBDOMINANT (LEFT) HAND FINGER MOVEMENTS IN FEMALES WITH DIFFERENT ALPHA RHYTHM CHARACTERISTICS

Alevtyna Morenko
1
,
Olena Morenko
2
,
Olena Dmytrotsa
1
,
Andriy Poruchynsky
1
,
Olha Korzhyk
1

1.
Faculty of Medicine and Biology, Lesya Ukrainka Eastern European National University, Lutsk, Ukraine
2.
Faculty of Medicine, Charles University, Prague, the Czech Republic
Health Prob Civil. 2020; 14(1): 63-69
Online publish date: 2020/03/04
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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.

keywords:

brain, motor activity, attention, alpha rhythm

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