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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">nnp</journal-id><journal-title-group><journal-title xml:lang="en">Neurology, Neuropsychiatry, Psychosomatics</journal-title><trans-title-group xml:lang="ru"><trans-title>Неврология, нейропсихиатрия, психосоматика</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2074-2711</issn><issn pub-type="epub">2310-1342</issn><publisher><publisher-name>"IMA-Press", LLC</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.14412/2074-2711-2024-3-31-37</article-id><article-id custom-type="elpub" pub-id-type="custom">nnp-2276</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>ORIGINAL INVESTIGATIONS</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ОРИГИНАЛЬНЫЕ ИССЛЕДОВАНИЯ И МЕТОДИКИ</subject></subj-group></article-categories><title-group><article-title>Diffusion tensor tomography with tractography in assessment of the pyramidal system in patients with highly active multiple sclerosis</article-title><trans-title-group xml:lang="ru"><trans-title>Применение диффузионно-тензорной томографии с трактографией для оценки пирамидной системы у пациентов с высокоактивным рассеянным склерозом</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0009-9726-7679</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Пешкин</surname><given-names>А. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Peshkin</surname><given-names>A. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>129110, Москва, ул. Щепкина, 61/2</p></bio><bio xml:lang="en"><p>61/2, Shchepkina St., Moscow 129110</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0003-3973-5362</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Тония</surname><given-names>Г. Т.</given-names></name><name name-style="western" xml:lang="en"><surname>Toniya</surname><given-names>G. T.</given-names></name></name-alternatives><bio xml:lang="ru"><p>129110, Москва, ул. Щепкина, 61/2</p></bio><bio xml:lang="en"><p>61/2, Shchepkina St., Moscow 129110</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-9037-0034</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Степанова</surname><given-names>Е. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Stepanova</surname><given-names>E. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>129110, Москва, ул. Щепкина, 61/2</p></bio><bio xml:lang="en"><p>61/2, Shchepkina St., Moscow 129110</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-0367-8282</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Лиждвой</surname><given-names>В. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Lizhdvoi</surname><given-names>V. Yu.</given-names></name></name-alternatives><bio xml:lang="ru"><p>129110, Москва, ул. Щепкина, 61/2</p></bio><bio xml:lang="en"><p>61/2, Shchepkina St., Moscow 129110</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-8706-7317</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Котов</surname><given-names>С. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Kotov</surname><given-names>S. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Котов Сергей Викторович.</p><p>129110, Москва, ул. Щепкина, 61/2</p></bio><bio xml:lang="en"><p>Sergey V. Kotov.</p><p>61/2, Shchepkina St., Moscow 129110</p></bio><email xlink:type="simple">kotovsv@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ГБУЗ МО «Московский областной научно-исследовательский клинический институт им. М.Ф. Владимирского»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>M.F. Vladimirsky Moscow Regional Research Clinical Institute</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>21</day><month>06</month><year>2024</year></pub-date><volume>16</volume><issue>3</issue><fpage>31</fpage><lpage>37</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Peshkin A.N., Toniya G.T., Stepanova E.A., Lizhdvoi V.Y., Kotov S.V., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Пешкин А.Н., Тония Г.Т., Степанова Е.А., Лиждвой В.Ю., Котов С.В.</copyright-holder><copyright-holder xml:lang="en">Peshkin A.N., Toniya G.T., Stepanova E.A., Lizhdvoi V.Y., Kotov S.V.</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://nnp.ima-press.net/nnp/article/view/2276">https://nnp.ima-press.net/nnp/article/view/2276</self-uri><abstract><sec><title>Objective</title><p>Objective: to study the pyramidal tract in patients with highly active multiple sclerosis (HAMS) during treatment switching from first-line MS therapy to second-line therapy due to suboptimal response.</p></sec><sec><title>Material and methods</title><p>Material and methods. 24 patients with HAMS were analyzed. Depending on the severity of pyramidal functional system (PFS) impairment according to EDSS, patients were divided into 2 groups; group 1 — 17 patients with an EDSS score of 0—2.5 points, group 2 — 7 patients with an EDSS score of ≥3 points. All patients underwent MRI of the brain according to the standard protocol. The diffusion tensor images (DTI) were processed using the DTI FiberTrak software.</p></sec><sec><title>Results</title><p>Results. The volume of the pyramidal tract was decreased in patients in group 2 (p&lt;0.001), asymmetry of the indicator was noted, in several patients a decrease in volume on the clinically intact side, which may indicate visually undetectable signs of damage of pyramidal tract. There was a clear tendency for a decrease in fractional anisotropy and a decrease in pyramidal tract length with increasing pyramidal deficit (p&lt;0.001). Negative correlations were found between indicators of neurological deficit and pyramidal tract volume and length (Spearman's Rho=-0.5246; p&lt;0.001) and a direct correlation between duration of MS and apparent diffusion coefficient (ADC) and inversely — with fractional anisotropy (Pearson's R=-0.290; p=0.039).</p></sec><sec><title>Conclusion</title><p>Conclusion. The observed decrease in pyramidal tract volume and length, increase in ADC, asymmetry of these indicators, correlations with the degree of pyramidal insufficiency, EDSS and duration of MS can obviously serve as additional criteria for evaluation of disease dynamics and efficacy of therapy.</p></sec></abstract><trans-abstract xml:lang="ru"><p>Цель исследования — изучение состояния пирамидного тракта у пациентов с высокоактивным рассеянным склерозом (ВАРС) в период переключения терапии в связи с неоптимальным ответом на лечение с препаратов, изменяющих течение РС (ПИТРС), первой линии на вторую линию терапии.</p><sec><title>Материал и методы</title><p>Материал и методы. Обследованы 24 пациента с ВАРС. В зависимости от выраженности нарушений со стороны пирамидной функциональной системы (ПФС) по EDSS пациенты были разделены на две группы: 1-я группа — 17 пациентов, у которых оценка EDSS составила 0—2,5 балла, 2-я группа — 7 пациентов с оценкой EDSS ≥3 баллов. Всем выполнена МРТ головного мозга по стандартному протоколу. Диффузионно-тензорные изображения (ДТИ) были обработаны с использованием программного обеспечения DTI FiberTrak.</p></sec><sec><title>Результаты</title><p>Результаты. Отмечено уменьшение объема пирамидного тракта у пациентов 2-й группы (р&lt;0,001), обнаружена асимметрия показателя, у ряда пациентов — уменьшение объема на клинически интактной стороне, что может свидетельствовать о визуально не выявляемых признаках поражения пирамидного тракта. Была отмечена отчетливая тенденция к снижению фракционной анизотропии и уменьшению длины пирамидного тракта по мере нарастания пирамидного дефицита (р&lt;0,001). Обнаружены отрицательные корреляции между показателями неврологического Дефицита и объемом и длиной пирамидного тракта (Rho Спирмена = -0,5246; р&lt;0,001), а также прямая корреляция длительности течения РС с измеряемым коэффициентом диффузии и обратная — с фракционной анизотропией (R Пирсона = -0,290, р=0,039).</p></sec><sec><title>Заключение</title><p>Заключение. Выявленные уменьшение показателей объема и длины пирамидного тракта, повышение измеряемого коэффициента диффузии, асимметрия этих показателей, корреляции с уровнем пирамидной недостаточности, EDSS и длительностью течения РС, очевидно, могут послужить дополнительными критериями оценки динамики заболевания и эффективности проводимой терапии.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>высокоактивный рассеянный склероз</kwd><kwd>пирамидная функциональная система</kwd><kwd>пирамидный тракт</kwd><kwd>объем</kwd><kwd>длина</kwd><kwd>измеряемый коэффициент диффузии</kwd></kwd-group><kwd-group xml:lang="en"><kwd>highly active multiple sclerosis</kwd><kwd>pyramidal functional system</kwd><kwd>pyramidal tract</kwd><kwd>volume</kwd><kwd>length</kwd><kwd>apparent diffusion coefficient</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">Singh S, Dallenga T, Winkler A, et al. 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