Мозкові Процеси Жінок Із Різною Модальною Альфа-Частотою Під Час Виконання Силових Мануальних Рухів

Morenko, Alevtyna; Korzhik, O.V.

doi:10.15421/201618

Cited by 2 publications

(2 citation statements)

References 10 publications

(12 reference statements)

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“…The choice of such assignments was associated with existing published data that demonstrate the greatest part of these cortical areas in the processsing of motor data and motor programming (Haaland et al, 2000;Ioffe, 2003;Bai et al, 2005;Neubauer et al, 2006;Morenko & Korzhik, 2016).…”

Section: Methodsmentioning

confidence: 99%

Cortex electrical activity during switching of motor programs among men and women

Korzhyk

Pavlovych

Dmytrotsa

et al. 2018

Regul. Mech. Biosyst.

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The inhibition of motor response is considered as an important aspect of executive control, as a way of changing behaviour. Gender, as a biological characteristic, stipulates different peculiarities of brain processes and, as a consequence, different behaviour of men and women. In the context of the Stop-Change task, the aim of our study was to examine whether there were differences in the brain processes between men and women. The method of “event-related desynchronization / synchronization” – ERD / ERS EEG – was used to clarify that issue. 36 men and 38 women, healthy, between the ages of 18 and 22, right-handed, participated in the experiment of compliance with bioethical requirements. The application of Stop-Change task required from the participants under the condition of a low tone (600 Hz sound) to quickly press with the help of the index finger and release the left button of the remote control. If there was a high tone (1600 Hz sound) the participant had to rapidly press and release with the help of middle finger the right button of the console. The prevalence of event-related synchronization phenomena of the α- and β-EEG-activity in cortical areas was distinguished in groups of men and women. It was apparently related to some deactivation of the cortex during the switching of motor program that was launched. At the same time, cortical electrical activity acquired certain specific features of the frequency-spatial organization, which could indicate the existence of certain gender characteristics of the brain processes. The weaker ERG EEG among women (compared with men) at 10 Hz, 16 Hz in symmetrical frontal and left central and parietal areas was found. Instead, the relative increase of ERS EEG among women was set in the range of 10 Hz (right central areas), 13 Hz (frontal central areas) and 19 Hz (central parietal areas). Gender differences in the electrical activity of the cortex in the range above 25 Hz of the EEG were characterized by some instability of the ERS and ERD responses in the frequency and spatial aspects.

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Section: Methodsmentioning

confidence: 99%

Cortex electrical activity during switching of motor programs among men and women

Korzhyk

Pavlovych

Dmytrotsa

et al. 2018

Regul. Mech. Biosyst.

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“…Таку закономірність ми пояснюємо тим, що фактор виконання експериментальних тестів субдомінантною рукою, очевидно, мав вирішальне значення в характері організації мозкової активності, ніж сама специфіка мануальних рухів. На противагу, під час виконання рухів пальців ведучою (правою) рукою у жінок і чоловіків ) Morenko (2016, Morenko and Korzgyk (2016) відмічали характерні зміни кортикальної активності залежно від специфіки організації мануальної моторики.…”

Section: обговоренняunclassified

Coherence of EEG frequency components during manual movements executed by the subdominant hand in women

Korzhyk

Pavlovych

Morenko

2017

Regul. Mech. Biosyst.

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The academic community is paying more and more attention to the question of the individual characteristics of the brain processes which ensure the manual motor programming of movements performed not only by the leading, but also by the subdominant hand. Researchers do not exclude the existence of the particular parameters of the human brain correlating with manual motor activities. This study involved 136 women at the age of 19–21 years. The testees were divided into two groups according to high and low values of the EEG modal α-frequency determined individually and in a motionless state. We evaluated the coherence status of the EEG frequency components in the motionless state and during movements performed by fingers of the subdominant (left) hand in response to rhythmic sound signals. The testing stages involved the sequential execution of motor tasks including clamping and unclamping performed by the fingers of the subdominant hand (such as grasping movements) without effort. The testees also performed fingering (a manual response to each stimulus) at in different times and not by all the fingers of the hand simultaneously, but separately, one by one, in a given sequence). Clamping and unclamping was executed by the fingers subject to power loading the (additional load on the fingers being 10H). Execution of manual movements by means of the subdominant hand in response to the sensory signals was accompanied by an increase in coherence in the EEG frequency components, especially in the frontal, temporal, and parietal cortexes of the central areas. Women with a low individual α-rate of such a regularity had significantly increased scores at the high (α3-, β-) frequencies of the EEG spectrum. At the same time, women in both groups mainly showed a decrease in the coherence coefficients of θ-, α1- and α3-activity in the frontal cortex leads in terms of the execution of the sequential finger movements and movements under power loading. The analysis of differences proved that women with a low IαF had relatively higher coherence of the EEG frequency components in the frontal lobes. However, relatively higher frequency components of EEG coherence in the central, posterior temporal and parietal leads were set in women with high IαF. Changes in cortical activity were established during different movements performed by fingers of the subdominant hand, namely, grasping movements of common occurrence, successive movements and movements under power loading. They differ from each other in their low specificity. Thus, the factor of motor performance of tests by means of the subdominant hand had obviously more decisive importance in the nature of the organization of brain activity than for the actual specifics of manual movements.

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Мозкові Процеси Жінок Із Різною Модальною Альфа-Частотою Під Час Виконання Силових Мануальних Рухів

Cited by 2 publications

References 10 publications

Cortex electrical activity during switching of motor programs among men and women

Cortex electrical activity during switching of motor programs among men and women

Coherence of EEG frequency components during manual movements executed by the subdominant hand in women

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