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<article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Human Physiology</journal-id><journal-title-group><journal-title xml:lang="en">Human Physiology</journal-title><trans-title-group xml:lang="ru"><trans-title>Физиология человека</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0131-1646</issn><issn publication-format="electronic">3034-6150</issn><publisher><publisher-name xml:lang="en">The Russian Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">664064</article-id><article-id pub-id-type="doi">10.31857/S0131164624040053</article-id><article-id pub-id-type="edn">BTMRXZ</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Статьи</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Characteristics of Human Postactivation Effect of Skeletal Muscles Using Spectral and Non-Linear Parameters of the Surface Electromyogram</article-title><trans-title-group xml:lang="ru"><trans-title>Характеристика постактивационного эффекта скелетных мышц человека при помощи спектральных и нелинейных параметров интерференционной электромиограммы</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Meigal</surname><given-names>A. Yu.</given-names></name><name xml:lang="ru"><surname>Мейгал</surname><given-names>А. Ю.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>meigal@petrsu.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Peskova</surname><given-names>A. E.</given-names></name><name xml:lang="ru"><surname>Пескова</surname><given-names>А. Е.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>meigal@petrsu.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Sklyarova</surname><given-names>A. S.</given-names></name><name xml:lang="ru"><surname>Склярова</surname><given-names>А. С.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>meigal@petrsu.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Gerasimova-Meigal</surname><given-names>L. I.</given-names></name><name xml:lang="ru"><surname>Герасимова-Мейгал</surname><given-names>Л. И.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>meigal@petrsu.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Petrozavodsk State University</institution></aff><aff><institution xml:lang="ru">ФГБОУ ВО Петрозаводский государственный университет</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2024-10-31" publication-format="electronic"><day>31</day><month>10</month><year>2024</year></pub-date><volume>50</volume><issue>4</issue><fpage>59</fpage><lpage>67</lpage><history><date date-type="received" iso-8601-date="2025-02-25"><day>25</day><month>02</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2024, Russian Academy of Sciences</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2024, Российская академия наук</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="en">Russian Academy of Sciences</copyright-holder><copyright-holder xml:lang="ru">Российская академия наук</copyright-holder></permissions><self-uri xlink:href="https://journals.eco-vector.com/0131-1646/article/view/664064">https://journals.eco-vector.com/0131-1646/article/view/664064</self-uri><abstract xml:lang="en"><p>Postactivation effect (PAE, postactivation phenomenon) is a specific type of involuntary muscle tone (tonic automatism) which is generated in the “tonogenic” structures of the brain, presumably without the “sensory copy” and “motor command” mechanisms. In this regard, the electromyogram (EMG) signal of PAE may have a simpler temporal signal structure compared to PAE-inducing voluntary activity. The purpose of this work is to characterize the temporal structure and complexity of surface EMG (sEMG) of the human deltoid and biceps brachii muscles using fractal (<italic>D</italic>) and correlation dimensions (<italic>D</italic><italic><sub>c</sub></italic>). It was found that in deltoid muscles the value of <italic>D</italic> was 1.78–1.81 both during PAE and voluntary effort (p &gt; 0.05). <italic>D</italic><italic><sub>c</sub></italic><italic> </italic>(approximately 4.0–4.2) also did not differ between PAE and voluntary effort, although the average frequency of the sEMG spectrum during PAE was 15–16 Hz (p &lt; 0.05) higher compared to voluntary effort. In biceps brachii muscles, the <italic>D</italic> value was 1.8 during PAE and 1.62 during voluntary effort (p &lt; 0.05). <italic>D</italic><italic><sub>c</sub></italic> values did not differ between PAE and voluntary contraction (4–4.8). Thus, despite the supposed difference in the central organization of PAE and voluntary effort, the temporal structure of their sEMG did not differ, indicating that isometric voluntary effort and involuntary tone in the form of PAE share a common principle of sEMG signal generation. At the same time, the differences in the frequency of the sEMG spectrum indicate that the organization of sEMG signal during PAE is specific on the level of the motoneuron pool.</p></abstract><trans-abstract xml:lang="ru"><p>Постактивационный эффект (ПАЭ) представляет собой особый вид непроизвольного мышечного тонуса (тонический автоматизм), который генерируется в "тоногенных" структурах мозга, предположительно, без задействования механизмов "сенсорной копии" и "моторной команды". В связи с этим, сигнал электромиограммы (ЭМГ) ПАЭ может иметь более простую временную структуру по сравнению с индуцирующей ПАЭ произвольной активностью. Цель данной работы – охарактеризовать временную структуру и сложность интерференционной ЭМГ (иЭМГ) дельтовидной и двуглавой мышцы плеча человека при помощи фрактальной (<italic>D</italic>) и корреляционной размерности (<italic>D</italic><italic><sub>c</sub></italic>). Установлено, что в дельтовидных мышцах величина <italic>D</italic> составила 1.78–1.81 как во время ПАЭ, так и произвольного усилия (<italic>p</italic> &gt; 0.05). <italic>D</italic><italic><sub>c</sub></italic><italic> </italic>варьировала в пределах 4.0–4.2 и также не различалась между ПАЭ и произвольным усилием, хотя средняя частота спектра иЭМГ во время ПАЭ была на 15–16 Гц (<italic>p</italic> &lt; 0.05) выше по сравнению с произвольным усилием. В двуглавых мышцах плеча величина <italic>D</italic> составила 1.8 во время ПАЭ и 1.68 во время произвольного усилия (<italic>p</italic> &lt; 0.05), а <italic>D</italic><italic><sub>c</sub></italic> не различалась (4–4.8). Таким образом, несмотря на предполагаемое различие в центральной организации ПАЭ и произвольного усилия, временная структура их иЭМГ не различалась, что указывает на то, что изометрическое произвольное усилие и непроизвольный тонус в виде ПАЭ имеют общий принцип генерации сигнала иЭМГ. Вместе с тем различие в частоте спектра иЭМГ свидетельствует об особенностях организации ПАЭ и произвольного сокращения на уровне мотонейронного пула.</p></trans-abstract><kwd-group xml:lang="en"><kwd>postactivation effect</kwd><kwd>voluntary isometric contraction</kwd><kwd>interference electromyogram</kwd><kwd>fractal dimension</kwd><kwd>correlation dimension</kwd><kwd>spectral mean frequency</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>постактивационный эффект</kwd><kwd>произвольное изометрическое сокращение</kwd><kwd>интерференционная электромиограмма</kwd><kwd>фрактальная размерность</kwd><kwd>корреляционная размерность</kwd><kwd>средняя частота спектра</kwd></kwd-group><funding-group><award-group><funding-source><institution-wrap><institution xml:lang="ru">РНФ</institution></institution-wrap><institution-wrap><institution xml:lang="en">RSF</institution></institution-wrap></funding-source><award-id>25-24-00301</award-id></award-group></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Kohnstamm O. Demonstration einer katatoneartigen Erscheinung beim Gesunden (Katatonusuersuch) // Neurol. Central. 1915. V. 34. P. 290.</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>De Havas J., Ghosh A., Gomi H., Haggard P. Sensorimotor organization of a sustained involuntary movement // Front. Behav. Neurosci. 2015. V. 9. P. 185.</mixed-citation></ref><ref id="B3"><label>3.</label><mixed-citation>De Havas J., Gomi H., Haggard P. Experimental investigations of control principles of involuntary movement: a comprehensive review of the Kohnstamm phenomenon // Exp. Brain Res. 2017. V. 235. № 7. P. 1953.</mixed-citation></ref><ref id="B4"><label>4.</label><citation-alternatives><mixed-citation xml:lang="en">Gurfinkel V.S., Levik Y.S., Lebedev M.A. [Immediate and remote postactivation effects in the human motor system] // Neurophysiology. 1989. V. 21. № 3. P. 343.</mixed-citation><mixed-citation xml:lang="ru">Гурфинкель В.С., Левик Ю.С., Лебедев М.А. Ближние и отдаленные постактивационные эффекты в двигательной системе человека // Нейрофизиология. 1989. Т. 21. № 3. С. 343.</mixed-citation></citation-alternatives></ref><ref id="B5"><label>5.</label><citation-alternatives><mixed-citation xml:lang="en">Ukhtomskii A.A. [A special type of tonic reactions in human limbs]. Collection of works. Leningrad: Publishing House of LSU, 1962. V. 6. P. 43.</mixed-citation><mixed-citation xml:lang="ru">Ухтомский А.А. Особый вид тонических реакций в конечностях человека. Собрание сочинений. Л.: Изд-во Ленингр. гос. ордена Ленина ун-та, 1962. Т. 6. С. 43.</mixed-citation></citation-alternatives></ref><ref id="B6"><label>6.</label><citation-alternatives><mixed-citation xml:lang="en">Meigal A.Yu., Pis’mennyi K.N. The influence of whole body heating and cooling on the aftercontraction effect in the upper limb muscles // Human Physiology. 2009. V. 35. № 1. P. 51.</mixed-citation><mixed-citation xml:lang="ru">Мейгал А.Ю., Письменный К.Н. Влияние общего согревания и охлаждения организма на постактивационный эффект в мышцах верхних конечностей // Физиология человека. 2009. Т. 35. № 1. С. 60.</mixed-citation></citation-alternatives></ref><ref id="B7"><label>7.</label><mixed-citation>Duclos C., Roll R., Kavounoudias A., Roll J.P. Cerebral correlates of the “Kohnstamm phenomenon”: an fMRI study // Neuroimage. 2007. V. 34. № 2. P. 774.</mixed-citation></ref><ref id="B8"><label>8.</label><mixed-citation>Craske B., Craske J.D. Oscillator mechanisms in the human motor system: investigating their properties using the aftercontraction effect // J. Mot. Behav. 1986. V. 18. № 2. P. 117.</mixed-citation></ref><ref id="B9"><label>9.</label><mixed-citation>Gilhodes J.C., Gurfinkel V.S., Roll J.P. Role of Ia muscle spindle afferents in post-contraction and post-vibration motor effect genesis // Neurosci. Lett. 1992. V. 135. № 2. P. 247.</mixed-citation></ref><ref id="B10"><label>10.</label><citation-alternatives><mixed-citation xml:lang="en">Boon M.Y., Henry B.I., Suttle C.M., Dain S.J. The correlation dimension: a useful objective measure of the transient visual evoked potential? // J. Vis. 2008. V. 8. № 1. doi: 10.1167/8.1.6</mixed-citation><mixed-citation xml:lang="ru">Boon M.Y., Henry B.I., Suttle C.M., Dain S.J. The correlation dimension: a useful objective measure of the transient visual evoked potential? // J. Vis. 2008. V. 8. № 1. doi 10.1167/8.1.6</mixed-citation></citation-alternatives></ref><ref id="B11"><label>11.</label><mixed-citation>Gitter J.A., Czemiecki M.J. Fractal analysis of the electromyographic interference pattern // J. Neurosci. Methods. 1995. V. 58. № 1–2. P. 103.</mixed-citation></ref><ref id="B12"><label>12.</label><mixed-citation>Cui X., Gu S.-J., Cao J. et al. Correlation entropy and the Kosterlitz–Thouless transition // J. Phys. A: Math. Theor. 2007. V. 40. № 45. P. 13523.</mixed-citation></ref><ref id="B13"><label>13.</label><mixed-citation>Kozhina G.V., Person R.S., Popov K.E. et al. Motor unit discharge during muscular after-contraction // J. Electromyogr. Kinesiol. 1996. V. 6. № 3. P. 169.</mixed-citation></ref><ref id="B14"><label>14.</label><mixed-citation>Farina D., Merletti R., Enoka R.M. The extraction of neural strategies from the surface EMG: An update // J. Appl. Physiol. 2014. V. 117. № 11. P. 1215.</mixed-citation></ref><ref id="B15"><label>15.</label><citation-alternatives><mixed-citation xml:lang="en">Meigal A.Yu., Gerasimova-Meigal L.I., Peskova A.E. Postactivation effect in the deltoid muscle of healthy young subjects after a short-term “dry” immersion // Human Physiology. 2021. V. 47. № 3. P. 289.</mixed-citation><mixed-citation xml:lang="ru">Мейгал А.Ю., Герасимова-Мейгал Л.И., Пескова А.Е. Постактивационный эффект дельтовидной мышцы здорового молодого человека после краткосрочной "сухой" иммерсии // Физиология человека. 2021. Т. 47. № 3. C. 52.</mixed-citation></citation-alternatives></ref><ref id="B16"><label>16.</label><mixed-citation>Brice T., McDonagh M. Abduction of the humerus by postural aftercontractions in man: effects of force and duration of previous voluntary contractions // J. Physiol. (London). 2001. V. 536. P. 214.</mixed-citation></ref><ref id="B17"><label>17.</label><citation-alternatives><mixed-citation xml:lang="en">Meigal A.Yu., Zaripova Yu.R. Influence of postconceptual age on the electromyographic characteristics in newborns // Human Physiology. 2013. V. 39. № 3. P. 278.</mixed-citation><mixed-citation xml:lang="ru">Мейгал А.Ю., Зарипова Ю.Р. Влияние возраста после зачатия на характеристики интерференционной электромиограммы у новорожденных детей // Физиология человека. 2013. Т. 39. № 3. С. 61.</mixed-citation></citation-alternatives></ref><ref id="B18"><label>18.</label><mixed-citation>Gandevia S.C. Spinal and supraspinal factors in human muscle fatigue // Physiol. Rev. 2001. V. 81. № 4. P. 1725.</mixed-citation></ref><ref id="B19"><label>19.</label><mixed-citation>Ikegawa S., Shinohara M., Fukunaga T. et al. Nonlinear time-course of lumbar muscle fatigue using recurrence quantifications // Biol. Cybern. 2000. V. 82. № 5. P. 373.</mixed-citation></ref><ref id="B20"><label>20.</label><mixed-citation>Del Santo F., Gelli F., Mazzocchio R., Rossi A. Recurrence quantification analysis of surface EMG detects changes in motor unit synchronization induced by recurrent inhibition // Exp. Brain Res. 2007. V. 178. № 3. P. 308.</mixed-citation></ref><ref id="B21"><label>21.</label><mixed-citation>Fuglsang-Frederiksen A. The utility of interference pattern analysis // Muscle Nerve. 2000. V. 23. № 1. P. 18.</mixed-citation></ref><ref id="B22"><label>22.</label><mixed-citation>Fuglsang-Frederiksen A., Dahl K., Lo Monaco M. Electrical muscle activity during a gradual increase in force in patients with neuromuscular diseases // Electroencephalogr. Clin. Neurophysiol. 1984. V. 57. № 4. P. 320.</mixed-citation></ref><ref id="B23"><label>23.</label><mixed-citation>Mochizuki G., Ivanova T.D., Garland S.J. Synchronization of motor units in human soleus muscle during standing postural tasks // J. Neurophysiol. 2005. V. 94. № 1. P. 62.</mixed-citation></ref><ref id="B24"><label>24.</label><mixed-citation>Mesin L., Cescon C., Gazzoni M. et al. A bi-dimensional index for the selective assessment of myoelectric manifestations of peripheral and central muscle fatigue // J. Electromyogr. Kinesiol. 2009. V. 19. № 5. P. 851.</mixed-citation></ref><ref id="B25"><label>25.</label><mixed-citation>Beretta-Piccoli M., D’Antona G., Barbero M. et al. Evaluation of central and peripheral fatigue in the quadriceps using fractal dimension and conduction velocity in young females // PLoS One. 2015. V. 10. № 4. P. e0123921.</mixed-citation></ref><ref id="B26"><label>26.</label><mixed-citation>Beretta-Piccoli M., Boccia G., Ponti T. et al. Relationship between isometric muscle force and fractal dimension of surface electromyogram // Biomed Res. Int. 2018. V. 2018. P. 5373846.</mixed-citation></ref></ref-list></back></article>
