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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="en"><front><journal-meta><journal-id journal-id-type="publisher-id">epilepsia</journal-id><journal-title-group><journal-title xml:lang="en">Epilepsy and paroxysmal conditions</journal-title><trans-title-group xml:lang="ru"><trans-title>Эпилепсия и пароксизмальные состояния</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2077-8333</issn><issn pub-type="epub">2311-4088</issn><publisher><publisher-name>IRBIS LLC</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.17749/2077-8333/epi.par.con.2023.133</article-id><article-id custom-type="elpub" pub-id-type="custom">epilepsia-877</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="en"><subject>CLINICAL CASES</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>КЛИНИЧЕСКИЕ СЛУЧАИ</subject></subj-group></article-categories><title-group><article-title>After-discharge activity as a basis to change intraoperative mapping protocol for functionally significant brain areas</article-title><trans-title-group xml:lang="ru"><trans-title>Постразрядная активность как основание изменения протокола интраоперационного картирования функционально значимых зон головного мозга</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0102-1378</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Подгурская</surname><given-names>М. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Podgurskaya</surname><given-names>M. G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Подгурская Мария Геннадьевна – врач-невролог, врач функциональной диагностики</p><p>3-й Хорошевский пр-д, д. 1, стр. 2, Москва 123007</p></bio><bio xml:lang="en"><p>Maria G. Podgurskaya – Neurologist, Functional Diagnostician</p><p>1 bldg 2 3rd Khoroshevskiy Dr., Moscow 123007</p></bio><email xlink:type="simple">dr.maria.podgurskaya@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5142-9400</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Каньшина</surname><given-names>Д. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Kanshina</surname><given-names>D. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Каньшина Дарья Сергеевна – к.м.н., старший научный сотрудник отдела функциональной диагностики</p><p>ул. Большая Полянка, д. 22, Москва 119180</p><p>Scopus Author ID: 57221390389</p></bio><bio xml:lang="en"><p>Daria S. Kanshina – MD, PhD, Senior Researcher, Department of Functional Diagnostics</p><p>22 Bolshaya Polyanka Str., Moscow 119180</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4578-2205</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Димерцев</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Dimertsev</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Димерцев Алексей Владимирович – лаборант кафедры нейрохирургии, заведующий учебной частью кафедры нейрохирургии</p><p>ул. Нижняя Первомайская, д. 70, Москва 105203</p></bio><bio xml:lang="en"><p>Aleksey V. Dimertsev – Laboratory Assistant, Department of Neurosurgery, Head of Educational Unit, Department of Neurosurgery</p><p>70 Nizhnyaya Pervomayskaya Str., Moscow 105203</p></bio><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-9935-3249</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Александров</surname><given-names>М. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Alexandrov</surname><given-names>M. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Александров Михаил Всеволодович – д.м.н., профессор, заведующий отделением клинической нейрофизиологии, заведующий лабораторией клинических исследований в нейрохирургии и неврологии</p><p>ул. Аккуратова, д. 2, Санкт-Петербург 197341</p></bio><bio xml:lang="en"><p>Mikhail V. Alexandrov – Dr. Med. Sc., Professor, Head of Department of Clinical Neurophysiology, Head of Laboratory of Clinical Research in Neurosurgery and Neurology</p><p>2 Akkuratov Str., Saint Petersburg 197341</p></bio><xref ref-type="aff" rid="aff-4"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-3292-2758</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Никитин</surname><given-names>С. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Nikitin</surname><given-names>S. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Никитин Сергей Сергеевич – д.м.н., профессор, заведующий кафедрой генетики неврологических болезнеи</p><p>ул. Москворечье, д. 1, Москва 115478</p></bio><bio xml:lang="en"><p>Sergey S. Nikitin – Dr. Med. Sc., Professor, Chief of Chair of Genetics of Neurological Diseases</p><p>1 Moskvorechye Str., Moscow 115478</p></bio><xref ref-type="aff" rid="aff-5"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Клиника «Медси»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Medsi Clinic</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Государственное бюджетное учреждение здравоохранения г. Москвы «Научно-исследовательский институт неотложной детской хирургии и травматологии» Департамента здравоохранения г. Москвы</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Research Institute of Emergency Pediatric Surgery and Traumatology</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Федеральное государственное бюджетное учреждение «Национальный медико-хирургический центр им. Н.И. Пирогова» Министерства здравоохранения Российской Федерации</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Pirogov National Medical and Surgical Center</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-4"><aff xml:lang="ru"><institution>Федеральное государственное бюджетное учреждение «Национальный медицинский исследовательский центр им. В.А. Алмазова» Министерства здравоохранения Российской Федерации</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Almazov National Medical Research Center</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-5"><aff xml:lang="ru"><institution>Федеральное государственное бюджетное научное учреждение «Медико-генетический научный центр им. академика Н.П. Бочкова»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Bochkov Medical and Genetic Research Center</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>29</day><month>03</month><year>2023</year></pub-date><volume>15</volume><issue>1</issue><fpage>36</fpage><lpage>43</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Podgurskaya M.G., Kanshina D.S., Dimertsev A.V., Alexandrov M.V., Nikitin S.S., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Подгурская М.Г., Каньшина Д.С., Димерцев А.В., Александров М.В., Никитин С.С.</copyright-holder><copyright-holder xml:lang="en">Podgurskaya M.G., Kanshina D.S., Dimertsev A.V., Alexandrov M.V., Nikitin S.S.</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.epilepsia.su/jour/article/view/877">https://www.epilepsia.su/jour/article/view/877</self-uri><abstract><sec><title>Background</title><p>Background. After-discharge (AD) activity is a pattern that differs from background corticography, represented by rhythmic stereotypical slow waves and/or repetitive spike discharges with ≥1 Hz frequency, recorded after cessation of electrical stimulation and lasting for more than 2 seconds. Despite the accumulated experience in the field of intraoperative neuromonitoring, there is no unified protocol for high-frequency stimulation of cortical functional areas (FAs) upon the AD event.</p></sec><sec><title>Objective</title><p>Objective: to demonstrate a need to change the intraoperative FAs mapping protocol in patients with brain tumor on awakening in cases of AD recording.</p></sec><sec><title>Material and methods</title><p>Material and methods. Two clinical cases of awake surgical functional mapping followed by resection of the brain tumor are presented. Multimodal monitoring included high-frequency stimulation according to the approved intrahospital protocol with maximum stimulation force of auditory-speech zones of 2.5 mA, electrocorticography, and subcortical dynamic mapping.</p></sec><sec><title>Results</title><p>Results. In the first case, AD was registered while FAs mapping in a patient with a history of one epileptic seizure, upon reaching the maximum stimulation force of 2.5 mA, that was replaced by recording focal epileptiform activity with the following evolution to ictal generalized event and development of intraoperative convulsive seizure. In the second patient with a history of recurrent epileptic seizures, AD with spatiotemporal evolution of the pattern development of clinical ictal event was registered with stimulation at 2.5 mA. In both cases, the appearance of AD required to change mapping protocol with a stepwise decrease in stimulus strength to obtain cortical FAs data.</p></sec><sec><title>Conclusion</title><p>Conclusion. Registration of AD is the basis for changing the protocol of high-frequency cortical stimulation in surgical treatment of brain tumor FAs.</p></sec></abstract><trans-abstract xml:lang="ru"><sec><title>Актуальность</title><p>Актуальность. Постразрядная активность (ПА) – отличающийся от фоновой кортикографии паттерн активности, который представлен ритмичными стереотипными замедленными волнами и/или повторяющимися спайковыми разрядами с частотой 1 Гц и более, регистрируется после появления электростимуляции и продолжается дольше 2 с. Несмотря на накопленный опыт в области интраоперационного нейромониторинга, единого протокола высокочастотной стимуляции функционально значимых зон (ФЗЗ) головного мозга при появлении ПА нет.</p></sec><sec><title>Цель</title><p>Цель: продемонстрировать необходимость изменения протокола интраоперационного картирования ФЗЗ у пациентов с новообразованиями головного мозга в условиях пробуждения в случаях регистрации ПА.</p></sec><sec><title>Материал и методы</title><p>Материал и методы. Представлено два клинических наблюдения хирургического лечения пациентов с новообразованиями ФЗЗ головного мозга под контролем интраоперационного нейромониторинга в условиях пробуждения. Мультимодальный мониторинг включал высокочастотную стимуляцию по утвержденному внутрибольничному протоколу с максимальной силой стимуляции слухоречевых зон 2,5 мА, электрокортикографию, субкортикальное динамическое картирование.</p></sec><sec><title>Результаты</title><p>Результаты. В первом случае при поиске ФЗЗ у пациента с одним эпилептическим приступом в анамнезе по достижении максимальной силы стимуляции 2,5 мА зарегистрирована ПА, сменившаяся фокальной эпилептиформной активностью с эволюцией в иктальный генерализованный паттерн и развитием интраоперационного судорожного приступа. У второго пациента с периодическими эпилептическими приступами в анамнезе при стимуляции 2,5 мА зарегистрирована ПА с пространственно-временной эволюцией паттерна без развития клинического иктального события. В обоих случаях появление ПА потребовало изменения протокола картирования с пошаговым снижением силы стимула для получения данных по ФЗЗ коры головного мозга.</p></sec><sec><title>Заключение</title><p>Заключение. Регистрация ПА является основой для изменения протокола высокочастотной стимуляции коры головного мозга при хирургическом лечении новообразования ФЗЗ.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>Клиничеcкая нейрофизиология</kwd><kwd>биоэлектрическая активность</kwd><kwd>электрокортикография</kwd><kwd>постразрядная активность</kwd><kwd>картирование функционально значимых зон</kwd><kwd>интраоперационный нейромониторинг</kwd><kwd>опухоли головного мозга</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Clinical neurophysiology</kwd><kwd>bioelectrical activity</kwd><kwd>electrocorticography</kwd><kwd>post-discharge activity</kwd><kwd>functionally significant areas mapping</kwd><kwd>intraoperative neuromonitoring</kwd><kwd>brain tumors</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Kalamangalam G.P., Tandon N., Slater J.D. 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