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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">Consortium PSYCHIATRICUM</journal-id><journal-title-group><journal-title xml:lang="en">Consortium PSYCHIATRICUM</journal-title><trans-title-group xml:lang="ru"><trans-title>Consortium PSYCHIATRICUM</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2712-7672</issn><issn publication-format="electronic">2713-2919</issn><publisher><publisher-name xml:lang="en">Eco-Vector</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">6140</article-id><article-id pub-id-type="doi">10.17816/CP6140</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>RESEARCH</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>ИССЛЕДОВАНИЕ</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">EEG alpha band characteristics in patients with a depressive episode within recurrent and bipolar depression</article-title><trans-title-group xml:lang="ru"><trans-title>Характеристики альфа-ритма ЭЭГ у больных с депрессивным эпизодом в рамках рекуррентной и биполярной депрессии</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1052-855X</contrib-id><contrib-id contrib-id-type="scopus">6506895310</contrib-id><contrib-id contrib-id-type="spin">2419-1263</contrib-id><name-alternatives><name xml:lang="en"><surname>Bokhan</surname><given-names>Nikolay A.</given-names></name><name xml:lang="ru"><surname>Бохан</surname><given-names>Николай Александрович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Dr. Sci. (Med.), Professor, Academician of the Russian Academy of Sciences; Director of Tomsk National Research Medical Center; Head of the Department of Psychiatry, Narcology, Psychotherapy, Siberian State Medical University</p></bio><bio xml:lang="ru"><p>д.м.н., Профессор, Академик РАН; Директор НИИ психического здоровья, ФГБНУ «Томский национальный исследовательский медицинский центр Российской академии наук»; Заведующий кафедрой психиатрии, психотерапии, наркологии с курсом медицинской психологии ГБОУ ВПО СибГМУ Минздрава России</p></bio><email>mental@tnimc.ru</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-7709-3917</contrib-id><contrib-id contrib-id-type="scopus">57211892228</contrib-id><contrib-id contrib-id-type="spin">3902-4570</contrib-id><name-alternatives><name xml:lang="en"><surname>Galkin</surname><given-names>Stanislav A.</given-names></name><name xml:lang="ru"><surname>Галкин</surname><given-names>Станислав Алексеевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Cand. Sci. (Med.), Tomsk National Research Medical Center</p></bio><bio xml:lang="ru"><p>к.м.н., НИИ психического здоровья, ФГБНУ «Томский национальный исследовательский медицинский центр Российской академии наук»</p></bio><email>s01091994@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0939-0856</contrib-id><contrib-id contrib-id-type="scopus">57216418343</contrib-id><contrib-id contrib-id-type="spin">3607-2437</contrib-id><name-alternatives><name xml:lang="en"><surname>Vasilyeva</surname><given-names>Svetlana N.</given-names></name><name xml:lang="ru"><surname>Васильева</surname><given-names>Светлана Николаевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Cand. Sci. (Med.), Tomsk National Research Medical Center</p></bio><bio xml:lang="ru"><p>к.м.н., НИИ психического здоровья, ФГБНУ «Томский национальный исследовательский медицинский центр Российской академии наук»</p></bio><email>mental@tnimc.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Mental Health Research Institute, Tomsk National Research Medical Center of the Russian Academy of Sciences</institution></aff><aff><institution xml:lang="ru">НИИ психического здоровья, ФГБНУ «Томский национальный исследовательский медицинский центр Российской академии наук»</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Siberian State Medical University</institution></aff><aff><institution xml:lang="ru">Сибирский государственный медицинский университет</institution></aff></aff-alternatives><pub-date date-type="preprint" iso-8601-date="2023-08-31" publication-format="electronic"><day>31</day><month>08</month><year>2023</year></pub-date><pub-date date-type="pub" iso-8601-date="2023-09-29" publication-format="electronic"><day>29</day><month>09</month><year>2023</year></pub-date><volume>4</volume><issue>3</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>5</fpage><lpage>12</lpage><history><date date-type="received" iso-8601-date="2023-04-10"><day>10</day><month>04</month><year>2023</year></date><date date-type="accepted" iso-8601-date="2023-08-03"><day>03</day><month>08</month><year>2023</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2023, Bokhan N.A., Galkin S.A., Vasilyeva S.N.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2023, Бохан Н.А., Галкин С.А., Васильева С.Н.</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="en">Bokhan N.A., Galkin S.A., Vasilyeva S.N.</copyright-holder><copyright-holder xml:lang="ru">Бохан Н.А., Галкин С.А., Васильева С.Н.</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://creativecommons.org/licenses/by-nc-nd/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://consortium-psy.com/jour/article/view/6140">https://consortium-psy.com/jour/article/view/6140</self-uri><abstract xml:lang="en"><p><bold>BACKGROUND: </bold>The search for biological markers for the differential diagnosis of recurrent depression and bipolar depression is an important undertaking in modern psychiatry. Electroencephalography (EEG) is one of the promising tools in addressing this challenge.</p> <p><bold>AIM: </bold>To identify differences in the quantitative characteristics of the electroencephalographic alpha band activity in patients with a depressive episode within the framework of recurrent depression and bipolar depression.</p> <p><bold>METHODS: </bold>Two groups of patients (all women) were formed: one consisting of subjects with recurrent depressive disorder and one with subjects experiencing a current mild/moderate episode (30 patients), and subjects with bipolar affective disorder or a current episode of mild or moderate depression (30 patients). The groups did not receive pharmacotherapy and did not differ in their socio-demographic parameters or total score on the Hamilton depression scale. A baseline electroencephalogram was recorded, and the quantitative characteristics of the alpha band activity were analyzed, including the absolute spectral power, interhemispheric coherence, and EEG activation.</p> <p><bold>RESULTS: </bold>The patients with recurrent depressive disorder demonstrated statistically significantly lower values of the average absolute spectral power of the alpha band (<italic>z=</italic>2.481; <italic>p=</italic>0.042), as well as less alpha attenuation from eyes closed to eyes open (<italic>z=</italic>2.573; <italic>p=</italic>0.035), as compared with the patients with bipolar affective disorder.</p> <p><bold>CONCLUSION:</bold> The presented quantitative characteristics of alpha activity are confirmation that patients with affective disorders of different origins also display distinctive electrophysiological features which can become promising biomarkers and could help separate bipolar depression from the recurrent type.</p></abstract><trans-abstract xml:lang="ru"><p><bold>ВВЕДЕНИЕ: </bold>Поиск биологических маркеров для дифференциальной диагностики рекуррентной и биполярной депрессии является важной задачей современной психиатрии. Электроэнцефалография (ЭЭГ) выступает одним из перспективных инструментов для решения данной задачи.</p> <p><bold>ЦЕЛЬ: </bold>Выявить различия количественных характеристик альфа-ритма электроэнцефалограммы у пациентов с депрессивным эпизодом в рамках рекуррентной и биполярной депрессии.</p> <p><bold>МЕТОДЫ: </bold>Выделены две группы пациентов (женщин): с рекуррентным депрессивным расстройством, текущий эпизод легкой/средней степени тяжести (30 пациентов) и с биполярным аффективным расстройством, текущий эпизод легкой или умеренной депрессии (30 пациентов). Группы пациентов не получали фармакотерапию и не различались по социально-демографическим показателям и суммарной оценке по шкале депрессии Гамильтона. Проводилась запись фоновой электроэнцефалограммы и анализировались количественные характеристики альфа-ритма: абсолютная спектральная мощность, межполушарная когерентность и реакция активации.</p> <p><bold>РЕЗУЛЬТАТЫ: </bold>У пациентов с рекуррентным депрессивным расстройством по сравнению с пациентами с биполярным аффективным расстройством обнаружены статистически значимо меньшие показатели усредненной абсолютной спектральной мощности альфа-ритма (<italic>z=</italic>2,481; <italic>р=</italic>0,042), а также меньшая степень депрессии альфа-ритма при открывании глаз (<italic>z=</italic>2,573; <italic>p=</italic>0,035).</p> <p><bold>ЗАКЛЮЧЕНИЕ: </bold>Представленные количественные характеристики альфа-активности подтверждают, что больные с аффективными расстройствами различного генеза имеют свои отличительные электрофизиологические особенности, которые могут стать перспективными биомаркерами для различения биполярной и рекуррентной депрессии.</p></trans-abstract><kwd-group xml:lang="en"><kwd>electroencephalogram</kwd><kwd>alpha rhythm</kwd><kwd>recurrent depression</kwd><kwd>bipolar depression</kwd><kwd>biomarkers</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>электроэнцефалограмма</kwd><kwd>альфа-ритм</kwd><kwd>рекуррентная депрессия</kwd><kwd>биполярная депрессия</kwd><kwd>биомаркеры</kwd></kwd-group><funding-group><award-group><funding-source><institution-wrap><institution xml:lang="en">Russian Science Foundation</institution></institution-wrap><institution-wrap><institution xml:lang="ru">Российский научный фонд</institution></institution-wrap></funding-source><award-id>22–15–00084</award-id></award-group></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Tyuvina NA, Korobkova IG. 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