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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="other" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Russian Journal of Child Neurology</journal-id><journal-title-group><journal-title xml:lang="en">Russian Journal of Child Neurology</journal-title><trans-title-group xml:lang="ru"><trans-title>Русский журнал детской неврологии</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2073-8803</issn><issn publication-format="electronic">2412-9178</issn><publisher><publisher-name xml:lang="en">Publishing House ABV Press</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">423</article-id><article-id pub-id-type="doi">10.17650/2073-8803-2022-17-4-44-53</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>ORIGINAL REPORTS</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>ОРИГИНАЛЬНЫЕ СТАТЬИ</subject></subj-group><subj-group subj-group-type="article-type"><subject></subject></subj-group></article-categories><title-group><article-title xml:lang="en">Dynamic electroencephalographic study of persons – mild COVID-19 convalescents</article-title><trans-title-group xml:lang="ru"><trans-title>Динамическое электроэнцефалографическое исследование лиц, перенесших легкую форму COVID-19</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-9122-7144</contrib-id><name-alternatives><name xml:lang="en"><surname>Gulyaev</surname><given-names>S. A.</given-names></name><name xml:lang="ru"><surname>Гуляев</surname><given-names>С. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Sergey Aleksandrovich Gulyaev</p><p>117997</p><p>Build. 10, 1 Ostrovityanova St.</p><p>Moscow</p></bio><bio xml:lang="ru"><p>Сергей Александрович Гуляев</p><p>117997</p><p>ул. Островитянова, 1, стр. 10</p><p>Москва</p></bio><email>s.gulyaev73@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Federal Center of Brain and Neurotechnologies, Federal Biomedical Agency of Russia</institution></aff><aff><institution xml:lang="ru">ФГБУ «Федеральный центр мозга и нейротехнологий Федерального медико-биологического агентства России»</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2022-12-15" publication-format="electronic"><day>15</day><month>12</month><year>2022</year></pub-date><volume>17</volume><issue>4</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>44</fpage><lpage>53</lpage><history><date date-type="received" iso-8601-date="2023-05-18"><day>18</day><month>05</month><year>2023</year></date><date date-type="accepted" iso-8601-date="2023-05-18"><day>18</day><month>05</month><year>2023</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2022, ABV-Press</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2022, АБВ-пресс</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="en">ABV-Press</copyright-holder><copyright-holder xml:lang="ru">АБВ-пресс</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://rjdn.abvpress.ru/jour/about/editorialPolicies</ali:license_ref></license></permissions><self-uri xlink:href="https://rjdn.abvpress.ru/jour/article/view/423">https://rjdn.abvpress.ru/jour/article/view/423</self-uri><abstract xml:lang="en"><p><bold>   Background.</bold> The term “postcovid syndrome” is firmly entrenched in medical terminology, but many aspects of its clinical manifestations are not well understood.<bold>   Aim. </bold>To establish the presence of the nature and severity of changes in the bioelectrical activity of the brain in COVID-19 survivors, as well as their relationship with the formed clinical neurological and neuropsychological syndromes during convalescence.<bold>   Materials and methods.</bold> A dynamic study was conducted of 38 COVID-19 survivors returning to work. Neurophysiological studies were carried out using the EGI-GES-300 system (128 channels). The descriptive characteristics of electroencephalograms were built on the method of studying the spectral density of the electroencephalographic signal on the surface of the scalp, and the dynamic characteristics of the signal were studied by fixing electroencephalographic microstates, using the method of D. Lemmon and T. Kenning.</p><p><bold>   Results and conclusions. </bold>In the study, a relatively new diagnostic technique for studying cognitive impairments based on the analysis of electroencephalographic microstates was implemented, which made it possible to identify signs of functional restructuring of the neuronal macronetworks of the brain and trace the characteristic adaptation of a person during the period of convalescence.</p></abstract><trans-abstract xml:lang="ru"><p><bold>   Введение.</bold> Термин «постковидный синдром» прочно закрепился в медицинской терминологии, однако многие аспекты его клинических проявлений изучены недостаточно.   <bold>Цель исследования</bold> – установление характера и выраженности изменений биоэлектрической активности головного мозга у перенесших SARS-CoV-2, а также их взаимосвязи со сформировавшимися клиническими неврологическими и нейропсихологическими синдромами в период реконвалесценции.<bold>   Материалы и методы. </bold>Проведено динамическое обследование 38 человек, перенесших COVID-19 и вернувшихся к привычному образу жизни и выполнению профессиональных обязанностей. Нейрофизиологические исследования проводились c помощью системы EGI-GES-300 (128 каналов). Описательная характеристика электроэнцефалограмм базировалась на методе исследования спектральной плотности электроэнцефалографического сигнала на поверхности скальпа, а динамические характеристики сигнала исследовались с помощью фиксации электроэнцефалографических микросостояний посредством метода Д. Леммона и Т. Кенинга.<bold>   Результаты и выводы. </bold>В проведенном исследовании была реализована относительно новая диагностическая методика изучения когнитивных нарушений на основе анализа электроэнцефалографических микросостояний,<italic> </italic>позволившая выявить признаки функциональной перестройки нейрональных макросетей головного мозга и проследить характерную адаптацию человека в период реконвалесценции.</p></trans-abstract><kwd-group xml:lang="en"><kwd>new coronavirus infection</kwd><kwd>electroencephalography</kwd><kwd>electroencephalographic microstates</kwd><kwd>recovery</kwd><kwd>brain activity</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>новая коронавирусная инфекция</kwd><kwd>электроэнцефалография</kwd><kwd>электроэнцефалографические микросостояния</kwd><kwd>восстановление</kwd><kwd>мозговая активность</kwd></kwd-group><funding-group><funding-statement xml:lang="en">The work was performed without external funding</funding-statement><funding-statement xml:lang="ru">Работа выполнена без спонсорской поддержки</funding-statement></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><citation-alternatives><mixed-citation xml:lang="en">Luria A. 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