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 <front>
  <journal-meta>
   <journal-id journal-id-type="publisher-id">Russian Journal of Biological Physics and Chemisrty</journal-id>
   <journal-title-group>
    <journal-title xml:lang="en">Russian Journal of Biological Physics and Chemisrty</journal-title>
    <trans-title-group xml:lang="ru">
     <trans-title>АКТУАЛЬНЫЕ ВОПРОСЫ БИОЛОГИЧЕСКОЙ ФИЗИКИ И ХИМИИ</trans-title>
    </trans-title-group>
   </journal-title-group>
   <issn publication-format="print">2499-9962</issn>
  </journal-meta>
  <article-meta>
   <article-id pub-id-type="publisher-id">54632</article-id>
   <article-categories>
    <subj-group subj-group-type="toc-heading" xml:lang="ru">
     <subject>Общая биофизика</subject>
    </subj-group>
    <subj-group subj-group-type="toc-heading" xml:lang="en">
     <subject>General biophysics</subject>
    </subj-group>
    <subj-group>
     <subject>Общая биофизика</subject>
    </subj-group>
   </article-categories>
   <title-group>
    <article-title xml:lang="en">Brain rhythmic activity duting media-content perception and nature viewing</article-title>
    <trans-title-group xml:lang="ru">
     <trans-title>Ритмическая активность мозга при восприятии медиа-контента и созерцании природы</trans-title>
    </trans-title-group>
   </title-group>
   <contrib-group content-type="authors">
    <contrib contrib-type="author">
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Орехова</surname>
       <given-names>Д Д</given-names>
      </name>
      <name xml:lang="en">
       <surname>Orekhova</surname>
       <given-names>D D</given-names>
      </name>
     </name-alternatives>
     <email>dorekhova22@gmail.com</email>
     <xref ref-type="aff" rid="aff-1"/>
    </contrib>
    <contrib contrib-type="author">
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Каримова</surname>
       <given-names>Е Д</given-names>
      </name>
      <name xml:lang="en">
       <surname>Karimova</surname>
       <given-names>E D</given-names>
      </name>
     </name-alternatives>
     <xref ref-type="aff" rid="aff-2"/>
    </contrib>
   </contrib-group>
   <aff-alternatives id="aff-1">
    <aff>
     <institution xml:lang="ru">Московский государственный университет имени М.В. Ломоносова</institution>
     <country>ru</country>
    </aff>
    <aff>
     <institution xml:lang="en">Moscow State University</institution>
     <country>ru</country>
    </aff>
   </aff-alternatives>
   <aff-alternatives id="aff-2">
    <aff>
     <institution xml:lang="ru">Институт высшей нервной деятельности и нейрофизиологии РАН</institution>
     <country>ru</country>
    </aff>
    <aff>
     <institution xml:lang="en">Institut of higher nervous activity and neurophysiology of RAS</institution>
     <country>ru</country>
    </aff>
   </aff-alternatives>
   <pub-date publication-format="print" date-type="pub" iso-8601-date="2021-06-25T20:22:29+03:00">
    <day>25</day>
    <month>06</month>
    <year>2021</year>
   </pub-date>
   <pub-date publication-format="electronic" date-type="pub" iso-8601-date="2021-06-25T20:22:29+03:00">
    <day>25</day>
    <month>06</month>
    <year>2021</year>
   </pub-date>
   <volume>6</volume>
   <issue>2</issue>
   <fpage>239</fpage>
   <lpage>244</lpage>
   <history>
    <date date-type="received" iso-8601-date="2021-06-20T20:22:29+03:00">
     <day>20</day>
     <month>06</month>
     <year>2021</year>
    </date>
    <date date-type="accepted" iso-8601-date="2021-06-20T20:22:29+03:00">
     <day>20</day>
     <month>06</month>
     <year>2021</year>
    </date>
   </history>
   <self-uri xlink:href="https://rusjbpc.ru/en/nauka/article/54632/view">https://rusjbpc.ru/en/nauka/article/54632/view</self-uri>
   <abstract xml:lang="ru">
    <p>В настоящее время всё большее количество людей склонны заполнять любые паузы «сёрфингом» в интернете и просмотром различных развлекательных видеороликов, при этом необходимое для отдыха состояние спокойного бодрствования подменяется восприятием и анализом новой информации. Целью данной работы было проанализировать изменения функционального состояния головного мозга при активном просмотре медиаконтента и пассивном созерцании природы с использованием различных математических методов обработки электроэнцефалограммы (ЭЭГ). В пилотном исследовании участвовали 16 испытуемых 21-25 лет, с каждым из них проводилось 2 тридцатиминутные экспериментальные сессии в разные дни - «активный» просмотр видеороликов и «пассивное» созерцание природы и леса, во время которых регистрировали ЭЭГ. Кроме того, в работе анализировали оптимальность применения различных методов обработки длительных записей электроэнцефалограммы без разделения на эпохи: были выполнены преобразование Гилберта, вейвлет преобразование Event-Related Spectral Perturbation (ERSP), а также рассчитаны когерентность Inter-Trial Coherence (ITC) и суммарная электрическая активность мозга относительно начала стимуляции. Обработка и предобработка, для которой использовался метод независимых компонент (ICA), осуществлялись в программах EEGLAB и Brainstorm. В результате были выявлены различия динамики биоэлектрической активности мозга: в активной сессии на протяжении всей записи преобладали бета- ритмы, во второй половине сессии увеличивалась мощность тета-ритма; в пассивной сессии амплитуда сигнала меньше, преобладают альфа- и бета- ритмы, причём мощность альфа-активности повышается вначале сессии, а бета-ритма - во второй половине. Были сделаны некоторые выводы об адекватности используемых методов для анализа длительных записей электроэнцефалограммы: наиболее информативный метод - ERSP преобразование, а преобразование Гилберта в свою очередь оказалось очень чувствительно к наличию артефактов, так как основано на выделении огибающей.</p>
   </abstract>
   <trans-abstract xml:lang="en">
    <p>Currently, an increasing number of people are filling any pauses by surfing the Internet and watching various entertaining videos, while the necessary rest is replaced by the state of calm wakefulness by the perception and analysis of new information. The aim of this work was to analyze changes in the functional state of the brain during active perception of media content and passive viewing of nature using mathematical methods of processing an electroencephalogram (EEG). The pilot study involved 16 subjects aged 21-25 years, each of them underwent 2 thirty-minute experimental sessions in different days - “active” viewing of videos and “passive” contemplation of nature and forest, during which the EEG was recorded. In addition, the paper analyzes the optimality of the application of methods for processing long-term recordings of an electroencephalogram without dividing it into epochs: the Gilbert transform, the Event-Related Spectral Perturbation (ERSP), the Inter-Trial Coherence (ITC) and the effective electrical activity of the brain regarding the start of stimulation were calculated. Processing and preprocessing, which was implemented with Independent Component Analysis (ICA), were carried out in programs EEGLAB and Brainstorm. As a result, the dynamics of bioelectric activity of the brain were revealed: beta rhythms predominated throughout the work, in the second half of the session the power of the theta rhythm increased; in a passive session, the signal amplitude is less, alpha and beta rhythms prevail, and the power of the alpha activity increases at the beginning of the session, and the beta rhythm - in the second half. Some conclusions were made about the adequacy of the methods used for the analysis of long-term electroencephalogram recordings: the most informative method is the ERSP transform, but the Gilbert transform, in turn, turned out to be very sensitive to the presence of artifacts, since it is based on the envelope extraction.</p>
   </trans-abstract>
   <kwd-group xml:lang="ru">
    <kwd>электроэнцефалограмма (ЭЭГ)</kwd>
    <kwd>метод независимых компонент</kwd>
    <kwd>функциональное состояние</kwd>
    <kwd>частотно-временной анализ</kwd>
    <kwd>Вейвлет-преобразование</kwd>
   </kwd-group>
   <kwd-group xml:lang="en">
    <kwd>electroencephalogram (EEG)</kwd>
    <kwd>Independent Component Analysis</kwd>
    <kwd>functional state</kwd>
    <kwd>time-frequency analysis</kwd>
    <kwd>Wavelet transform</kwd>
   </kwd-group>
  </article-meta>
 </front>
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