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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">ssmu</journal-id><journal-title-group><journal-title xml:lang="ru">Бюллетень сибирской медицины</journal-title><trans-title-group xml:lang="en"><trans-title>Bulletin of Siberian Medicine</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1682-0363</issn><issn pub-type="epub">1819-3684</issn><publisher><publisher-name>Siberian State Medical University, the Ministry of Healthcare of the Russian Federation</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.20538/1682-0363-2019-2-127-145</article-id><article-id custom-type="elpub" pub-id-type="custom">ssmu-2310</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>ОРИГИНАЛЬНЫЕ СТАТЬИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ORIGINAL PAPERS</subject></subj-group></article-categories><title-group><article-title>О возможности омегоэлектроэнцефалографии в оценке функционального и метаболического состояния нервной ткани головного мозга при гипервентиляции</article-title><trans-title-group xml:lang="en"><trans-title>About the use of omega-electroencephalography to estmate functional and metabolic state of nervous tissue of the brain during hyperventilation</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Мурик</surname><given-names>С. Э.</given-names></name><name name-style="western" xml:lang="en"><surname>Murik</surname><given-names>S. E.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Мурик Сергей Эдуардович - кандидат биологических наук,  доцент, кафедра  физиологии и психофизиологии.</p><p>664003, Иркутск, ул. К. Маркса, 1.</p></bio><bio xml:lang="en"><p>Murik Sergey E. - PhD,  Аssociate  Рrofessor,  Physiology and Psychophysiology  Department.</p><p>1, K. Marx Str., Irkutsk, 664003.</p></bio><email xlink:type="simple">sergey_murik@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Иркутский государственный университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Irkutsk State University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2019</year></pub-date><pub-date pub-type="epub"><day>11</day><month>08</month><year>2019</year></pub-date><volume>18</volume><issue>2</issue><fpage>127</fpage><lpage>145</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Мурик С.Э., 2019</copyright-statement><copyright-year>2019</copyright-year><copyright-holder xml:lang="ru">Мурик С.Э.</copyright-holder><copyright-holder xml:lang="en">Murik S.E.</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://bulletin.ssmu.ru/jour/article/view/2310">https://bulletin.ssmu.ru/jour/article/view/2310</self-uri><abstract><p>Цель работы – исследовать  возможности нового электрофизиологического метода омегоэлектроэнцефалографии в оценке изменений функционального и метаболического состояния клеток  нервной ткани головного  мозга  в процессе  адаптации  к ишемии.</p><sec><title>Материал и методы</title><p>Материал и методы. Ишемия  головного  мозга  моделировалась с  помощью  гипервентиляционной пробы  (ГП).  Проведены  регистрация и   анализ  содружественных изменений  уровня  постоянного потенциала  (УПП)  и электроэнцефалограммы в 38 отведениях   у одного  и того  же  испытуемого  в процессе  четырехкратного повторения  ГП.</p></sec><sec><title>Результаты</title><p>Результаты. Ишемическое  состояние  головного  мозга,     формирующееся в процессе  волевой гипервентиляции,  первоначально  сопровождалось негативизацией  УПП  (0,5–1  мВ) и увеличением амплитуды ритмов ЭЭГ всех диапазонов.  После  прекращения  ГП и возвращения  УПП к исходному уровню развивалась    следовая  позитивизация УПП (около  1 мВ), сочетающаяся также  с повышенной  амплитудой  ритмов  ЭЭГ.   Адаптация  к  гипоксии  и ишемии,  моделируемая повторением  ГП, и  повышение  резистентности мозга  к  данным  неблагоприятным факторам  проявились  сначала  в появлении   кратковременного электропозитивного отклонения  УПП  на старте   пробы  и редукции следовой  позитивизации УПП, а затем  в полной  замене   в течение всей пробы электронегативного ответа  на позитивный  (около  0,5 мВ).</p></sec><sec><title>Заключение</title><p>Заключение. Анализ  характера содружественных изменений  УПП и ЭЭГ в процессе  гипервентиляции и после нее, а также   литературных  данных позволяет   предполагать,  что первоначально  в ответ на ГП в неокортексе развивается деполяризация клеток  нервной  ткани,  сочетающаяся с усилением нейрональной активности.  Активация  компенсаторных механизмов,  приводящая  к  повышению устойчивости  клеток нервной ткани к условиям ишемии, сопровождается развитием  после ишемической деполяризации следовой  гиперполяризации, а само повышение адаптационных  возможностей клеток  мозга    проявляется в замене    деполяризации клеточных  мембран  в ответе  на неблагоприятный фактор гиперполяризацией, сочетающейся  также  с повышенной нейрональной активностью.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Objectives</title><p>Objectives. The aim of this study was to investigate diagnostic capabilities of a new electrophysiological method  of omega-electroencephalography in the  estimation  of change  in functional  and metabolic  state  of the cells of nervous tissue during ischemic adaptation.</p></sec><sec><title>Materials and methods</title><p>Materials and methods.  Brain ischemia was modeled  based on a hyperventilation test  (HVT). Recording  and  analysis  were  made  on  concomitant changes  in direct  current potential level (DCPL) and EEG in 38 derivations  for the same test person  in a fourfold-replicated HVT.</p></sec><sec><title>Results</title><p>Results. Brain ischemia that  occurs  during volitional  hyperventilation was initially followed by DCPL negativation   (negative  shift)  (0.5–1  mV) and  increase  in amplitude  of all EEG  waves. Cessation  of HVT and return to  initial  DCPL were followed by positivation  (positive  shift) of DCPL (about  1 mV), combined  also with  high-amplitude EEG waves. Adaptation to  hypoxia and  ischemia,  modeled  using replication-based HVT,  and  improvement  of brain  resistance  to these  unfavorable  factors  manifested  themselves first in a short-term  electropositive deviation of DCPL at the start  of the test followed by DCPL positivation  reduction and then in complete substitution of electronegative response  to  positive  shift in DCPL (about  0.5 mV) during  the test.</p></sec><sec><title>Conclusion</title><p>Conclusion. The analysis of concomitant changes in DCPL and EEG during and after hyperventilation and literature data  analysis suggests that  HVT  was initially  responded  to  by depolarization in neocortical nerve  cells, combined  with  intensification  of  neuronal  activity. Activation  of compensatory mechanisms,  resulting  in improvement  of nerve  cell resistance  to ischemic conditions,  is associated  with  ischemic depolarization followed by hyperpolarization, and  enhancing  adaptive  capabilities  of brain  cells manifest  themselves  in substitution of cell membrane  depolarization to hyperpolarization in response to unfavorable  factor,  also combined with intense neuronal  activity.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>омегоэлектроэнцефалография</kwd><kwd>омегоЭЭГ</kwd><kwd>гипервентиляционная  ишемия</kwd><kwd>гипервентиляционная проба</kwd><kwd>гипервентиляция</kwd><kwd>уровень  постоянного потенциала</kwd><kwd>ЭЭГ</kwd><kwd>функциональное состояние</kwd><kwd>метаболическое состояние</kwd></kwd-group><kwd-group xml:lang="en"><kwd>omega-electroencephalography</kwd><kwd>omega-EEG</kwd><kwd>hyperventilation ischemia</kwd><kwd>hyperventilation test</kwd><kwd>hyperventilation</kwd><kwd>direct  current potential level</kwd><kwd>EEG</kwd><kwd>functional  state</kwd><kwd>metabolic  state</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Эта  работа  стала  возможна   благодаря   финансовой поддержке Европейской  программы Эразмус Мундус  (Triple2009212) и профессору Уолтеру Паулюсу (W. Paulus,   Department of Clinical Neurophysiology, University of Gettingen,  Германия)</funding-statement><funding-statement xml:lang="en">This  work  was  made  possible  owing  to  the  financial  support   of  the  European Program  Erasmus  Mundus  (Triple2009212)  and  Professor   Walter   Paulus  (W.  Paulus,  Department  of Clinical Neurophysiology, University of Gettingen,  Germany)</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">Мурик С.Э. Омегоэлектроэнцефалография – новый метод оценки функционального и метаболического состояния нервной ткани. Бюллетень Восточно-Сибирского научного центра СО РАМН. 2004; 3 (1): 154–189.</mixed-citation><mixed-citation xml:lang="en">Murik S.E. Omegaelectroencephalography (Direct current EEG) as a new way of estimation  of the functional and  metabolic state  of the  neural  tissue].  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