ВАРИАБЕЛЬНОСТЬ СЕРДЕЧНОГО РИТМА КОРЕННЫХ ЖИТЕЛЕЙ АРКТИКИ
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НИИ ноpмальной физиологии им. П.К. Анохина
Год издания: 2015
Кол-во страниц: 3
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The motor task performance efficiency was calculated as a percentage of «successful intervals» when alpha power EEG increased simultaneously with EMG power decreased during actual or mental imagery of motor performance. Series of repeated measures analyses of variance ANOVAs were run with intra-individual factors CONDITIONS (3 levels: rest, motor performance and imagination of motor performance), for men TEST_RETEST and for women NEUROHUMORAL STATE (5 levels: menstrual, follicular, ovulatory, luteal and premenstrual phases). Separately between group comparisons were provided (men vs women). Whenever necessary, Tukey HSD post-hoc test was performed. The level of significance was set at p < 0.05. Spearman’s correlations were used to estimate intraobserver, interobserver, and test–retest reliability. RESULTS. In female subjects upper alpha EEG/EMG ratio in rest condition doesn’t affected by neurohumoral states and was not differed from men’s values. During actual motor task performance and mental imagery upper alpha EEG and EMG levels depends on phase of menstrual cycle [F(1,230) ≥15.43, p=0.000]. Efficiency, evaluated as percentage of "successful intervals" during motor performance was highest at luteal phase (t>9.2, p<0.000), but in men it doesn’t change through 14 days and was the same as in women at luteal phase. Fluency in actual motor task performance and it’s mental imagery are highest too at luteal phase [F(1,230) ≥9.12, p=0.000]. CONCLUSIONS. In this study we present evidence of orderly changes in EEG/EMG index of psychomotor performance across the menstrual cycle in women which provide an explanation for the apparent logical association between sex-related patterns of alpha EEG/EMG and psychomotor ability. REFERENCES 1. Barry R.J., Clarke A.R., Johnstone S.J., Magee C.A., Rushby J.A. EEG differences between eyes-closed and eyes-open resting conditions // Clin Neurophysiol. 2007, 118(12):2765-73. 2. Bazanova O.M., Kuzminova O.I., Nikolenko E. D., and Petrova S.E. EEG activation response under different neurohumoral conditions // Human Physiology. 2014, 40(4): 375–382. 3. Bazanova O.M., Vernon D. Interpreting EEG alpha activity // Neurosci Biobehav Rev. 2014, 44:94-110. 4. Bernstein, N.A. (1996). On dexterity and its development. In M.L. Latash & M.T. Turvey (Eds.), Dexterity and its development (pp. 3244). Mahwah, NJ: Erlbaum. (Original work written in 1947 and published in 1991; translated by M.L. Latash). 5. Kiefer A.W., Gualberto Cremades J., Myer G.D. Train the brain: Novel electroencephalography data indicate links between motor learning and brain adaptations // J Nov Physiother. 2014, 4(2):198. DOI:10.12737/12299 ВАРИАБЕЛЬНОСТЬ СЕРДЕЧНОГО РИТМА КОРЕННЫХ ЖИТЕЛЕЙ АРКТИКИ 1Е.А.Бельчусова, 1,2О.Н.Колосова, 1Н.В. Мельгуй, 2Б.М.Кершенгольц, 1И.Л.Саввина