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<article article-type="research-article" dtd-version="1.3" 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" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">mes</journal-id><journal-title-group><journal-title xml:lang="ru">Экстремальная биомедицина</journal-title><trans-title-group xml:lang="en"><trans-title>Extreme Medicine</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">3033-8964</issn><issn pub-type="epub">3033-8972</issn><publisher><publisher-name>Centre for Strategic Planning of the Federal Medical and Biological Agency</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.47183/mes.2024-26-3-57-64</article-id><article-id custom-type="elpub" pub-id-type="custom">mes-7</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>КОСМИЧЕСКАЯ МЕДИЦИНА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>SPACE MEDICINE</subject></subj-group></article-categories><title-group><article-title>Психофизиологическое состояние человека в измененных магнитных условиях</article-title><trans-title-group xml:lang="en"><trans-title>The psychophysiological state of a person in altered magnetic conditions</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-3564-6798</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ковров</surname><given-names>Г. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Kovrov</surname><given-names>G. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ковров Геннадий Васильевич, д-р мед. наук, профессор</p><p>Москва</p></bio><bio xml:lang="en"><p>Moscow</p></bio><email xlink:type="simple">kgv2006@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0002-3749-588X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Попова</surname><given-names>О. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Popova</surname><given-names>O. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Попова Ольга Владимировна</p><p>Москва</p></bio><bio xml:lang="en"><p>Moscow</p></bio><email xlink:type="simple">olya.popovaolga2710@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-2596-8929</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Черникова</surname><given-names>А. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Chernikova</surname><given-names>A. G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Черникова Анна Григорьевна, канд. биол. наук</p><p>Москва</p></bio><bio xml:lang="en"><p>Moscow</p></bio><email xlink:type="simple">anna.impb@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-2174-3183</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Орлов</surname><given-names>О. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Orlov</surname><given-names>O. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Орлов Олег Игоревич, д-р. мед. наук, академик РАН</p><p>Москва</p></bio><bio xml:lang="en"><p>Moscow</p></bio><email xlink:type="simple">orlov@imbp.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Государственный научный центр Российской Федерации ‒ Институт медико-биологических проблем Российской академии наук</institution><country>Россия</country></aff><aff xml:lang="en"><institution>State Scientific Center of the Russian Federation ‒ Institute for Biomedical Problems of the Russian Academy of Sciences</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>14</day><month>10</month><year>2024</year></pub-date><volume>26</volume><issue>3</issue><fpage>57</fpage><lpage>64</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Ковров Г.В., Попова О.В., Черникова А.Г., Орлов О.И., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Ковров Г.В., Попова О.В., Черникова А.Г., Орлов О.И.</copyright-holder><copyright-holder xml:lang="en">Kovrov G.V., Popova O.V., Chernikova A.G., Orlov O.I.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://www.extrememedicine.ru/jour/article/view/7">https://www.extrememedicine.ru/jour/article/view/7</self-uri><abstract><sec><title>Введение</title><p>Введение. В связи с тем что в ближайшем будущем планируются космические полеты за пределы околоземной орбиты, становится актуальным изучение воздействия сниженного магнитного поля Земли на человека.</p></sec><sec><title>Цель</title><p>Цель. Оценка особенностей сенсомоторных реакций, качества ночного сна и развития дневной сонливости при 24-часовом пребывании в гипомагнитных условиях.</p></sec><sec><title>Материалы и методы</title><p>Материалы и методы. Экспериментальные исследования проведены в 2023 г. с участием 6 мужчин-добровольцев в возрасте от 26 до 37 лет. Были проведены 4 экспериментальные серии длительностью 24 ч каждая. В трех группах испытуемые подвергались воздействию гипомагнитных условий (в пределах 0,05–0,14 мкТл), в группе плацебо не было воздействия. В качестве методов исследования применялись анкетирование (по качеству и особенностям ночного сна и дневного бодрствования) и оценка особенностей сенсомоторных функций.</p></sec><sec><title>Результаты</title><p>Результаты. Установлено, что в гипомагнитных условиях усиливается дневная сонливость в 66% наблюдений по сравнению с 33% случаев в серии с плацебо (p = 0,003). Сразу после прекращения экспериментального воздействия наблюдалась быстрая активация центральной нервной системы, что выражалось в статистически значимом снижении общего времени зрительно-моторной реакции.</p></sec><sec><title>Выводы</title><p>Выводы. В гипомагнитных условиях сохраняется работа мозговых механизмов сна. В дневное время в гипомагнитных условиях развивается сонливость, что указывает на возможность изменения циркадианной ритмики в активирующих системах головного мозга. Сразу после прекращения действия гипомагнитных условий происходит быстрая активация центральной нервной системы, имеющая компенсаторный характер. Выявленные особенности влияния гипомагнитных условий на цикл сна–бодрствования и сенсомоторные функции предполагают проведение дальнейших исследований дневной сонливости с использованием дополнительных субъективных и объективных методов оценки уровня бодрствования и активности центральной нервной системы.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Introduction</title><p>Introduction. Due to the fact that manned space flights beyond Earth orbit are planned in the near future, it becomes relevant to study the effects of the Earth’s reduced magnetic field on humans.</p></sec><sec><title>Objective</title><p>Objective. To evaluate the features of sensorimotor reactions, quality of night sleep (nocturnal sleep) and the development of daytime sleepiness during a 24-hour stay under hypomagnetic conditions (HMC).</p></sec><sec><title>Materials and methods</title><p>Materials and methods. Experimental studies with the participation of 6 male volunteers aged 26 to 37 years were conducted in 2023. In total, four experimental series were carried out, lasting 24 hours each. The subjects were exposed to hypomagnetic conditions in three groups (the average value was between 0.05–0.14 µT). There was no exposure to such conditions in the placebo group.</p><p>The research methods included questionnaires regarding the quality and characteristics of night sleep, daytime wakefulness, as well as the study of sensorimotor functions. Statistical processing was carried out by the Statistica 13.0 software package.</p></sec><sec><title>Results</title><p>Results. Daytime sleepiness was found to increase under hypomagnetic conditions in 66% of observations as compared to 33% of cases in the placebo series (p=0.003). Immediately following the cessation of experimental exposure, a rapid activation of the central nervous system was observed, which was expressed in a statistically significant decrease in the total visual-motor reaction time.</p></sec><sec><title>Conclusions</title><p>Conclusions. Under hypomagnetic conditions, the work of brain sleep mechanisms is preserved. Daytime drowsiness that develops under hypomagnetic conditions indicates the possibility of changes in circadian rhythmicity in brain activating systems. The rapid activation of the central nervous system reported immediately following the termination of hypomagnetic conditions has a compensatory character. The revealed features of hypomagnetic conditions influence on the sleep-wake cycle and sensorimotor functions suggest further studies of daytime sleepiness using additional subjective and objective methods of wakefulness level and activity of the central nervous system assessment.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>сенсомоторные функции</kwd><kwd>гипомагнитные условия</kwd><kwd>простая зрительно-моторная реакция</kwd><kwd>анкетная самооценка</kwd><kwd>ночной сон</kwd><kwd>дневная сонливость</kwd></kwd-group><kwd-group xml:lang="en"><kwd>sensomotory functions</kwd><kwd>hypomagnetic conditions</kwd><kwd>simple visual-motor reaction</kwd><kwd>questioning self-assessment</kwd><kwd>night sleep</kwd><kwd>daytime drowsiness</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">работа была выполнена в рамках базовой тематики РАН FMFR-2024–0042.</funding-statement><funding-statement xml:lang="en">The study was conducted within the framework of the RAS basic theme FMFR-2024-0042</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Xue X, Ali YF, Luo W, Liu C, Zhou G, Liu NA. 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