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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">Kazan medical journal</journal-id><journal-title-group><journal-title xml:lang="en">Kazan medical journal</journal-title><trans-title-group xml:lang="ru"><trans-title>Казанский медицинский журнал</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0368-4814</issn><issn publication-format="electronic">2587-9359</issn><publisher><publisher-name xml:lang="en">Eco-Vector</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">632064</article-id><article-id pub-id-type="doi">10.17816/KMJ632064</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Theoretical and clinical medicine</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Теоретическая и клиническая медицина</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">Length characteristics of C₇ spinal nerve, middle trunk, and its anterior division</article-title><trans-title-group xml:lang="ru"><trans-title>Особенности длины спинномозгового нерва С₇, среднего ствола и его переднего разделения</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4809-4491</contrib-id><contrib-id contrib-id-type="spin">7526-1993</contrib-id><name-alternatives><name xml:lang="en"><surname>Gorbunov</surname><given-names>Nikolay S.</given-names></name><name xml:lang="ru"><surname>Горбунов</surname><given-names>Николай Станиславович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, Dr. Sci. (Med.), Prof., Depart. of Operative Surgery and Topographic Anatomy, Leading Researcher</p></bio><bio xml:lang="ru"><p>д-р мед. наук, проф., каф. оперативной хирургии и топографической анатомии, ведущий научный сотрудник</p></bio><email>gorbunov_ns@mail.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/0000-0001-5209-182X</contrib-id><contrib-id contrib-id-type="spin">3427-9859</contrib-id><name-alternatives><name xml:lang="en"><surname>Kober</surname><given-names>Kristina V.</given-names></name><name xml:lang="ru"><surname>Кобер</surname><given-names>Кристина Владимировна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>oncologist surgeon</p></bio><bio xml:lang="ru"><p>хирург-онколог</p></bio><email>k-kober@mail.ru</email><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5988-1688</contrib-id><contrib-id contrib-id-type="spin">8848-3659</contrib-id><name-alternatives><name xml:lang="en"><surname>Kasparov</surname><given-names>Eduard W.</given-names></name><name xml:lang="ru"><surname>Каспаров</surname><given-names>Эдуард Вильямович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, Dr. Sci. (Med.), Prof., chief physician</p></bio><bio xml:lang="ru"><p>д-р мед. наук, проф., глав. врач</p></bio><email>rsimpn@scn.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1462-7379</contrib-id><contrib-id contrib-id-type="spin">4904-2997</contrib-id><name-alternatives><name xml:lang="en"><surname>Rostovtsev</surname><given-names>Sergey I.</given-names></name><name xml:lang="ru"><surname>Ростовцев</surname><given-names>Сергей Иванович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, Dr. Sci. (Med.), Assistant Prof., Depart. of Anesthesiology and Resuscitation</p></bio><bio xml:lang="ru"><p>д-р мед. наук, доц., каф. анестезиологии и реаниматологии</p></bio><email>rostovcev.1960@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5839-1732</contrib-id><contrib-id contrib-id-type="spin">1155-1494</contrib-id><name-alternatives><name xml:lang="en"><surname>Arkhipkin</surname><given-names>Sergey V.</given-names></name><name xml:lang="ru"><surname>Архипкин</surname><given-names>Сергей Викторович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Senior Lecturer, Depart. of Operative Surgery and Topographic Anatomy</p></bio><bio xml:lang="ru"><p>старший преподаватель, каф. оперативной хирургии и топографической анатомии</p></bio><email>sergey1510@ya.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Professor V.F. Voino-Yasenetsky Krasnoyarsk State Medical University</institution></aff><aff><institution xml:lang="ru">Красноярский государственный медицинский университет им. проф. В.Ф. Войно-Ясенецкого</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Research Institute of Medical Problems of the North — Krasnoyarsk Science Centre of the Siberian Branch of Russian Academy of Science</institution></aff><aff><institution xml:lang="ru">Научно-исследовательский институт медицинских проблем Севера — Красноярский научный центр Сибирского отделения Российской академии наук</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">Krasnoyarsk Regional Clinical Oncology Dispensary named after A.I. Kryzhanovsky</institution></aff><aff><institution xml:lang="ru">Красноярский краевой клинический онкологический диспансер им. А.И. Крыжановского</institution></aff></aff-alternatives><pub-date date-type="preprint" iso-8601-date="2025-02-12" publication-format="electronic"><day>12</day><month>02</month><year>2025</year></pub-date><pub-date date-type="pub" iso-8601-date="2025-04-20" publication-format="electronic"><day>20</day><month>04</month><year>2025</year></pub-date><volume>106</volume><issue>2</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>187</fpage><lpage>194</lpage><history><date date-type="received" iso-8601-date="2024-05-16"><day>16</day><month>05</month><year>2024</year></date><date date-type="accepted" iso-8601-date="2024-10-28"><day>28</day><month>10</month><year>2024</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2025, Eco-Vector</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2025, Эко-Вектор</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="en">Eco-Vector</copyright-holder><copyright-holder xml:lang="ru">Эко-Вектор</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/" start_date="2028-04-20"/></permissions><self-uri xlink:href="https://kazanmedjournal.ru/kazanmedj/article/view/632064">https://kazanmedjournal.ru/kazanmedj/article/view/632064</self-uri><abstract xml:lang="en"><p><bold>BACKGROUND</bold>: Contralateral transfer of donor nerves in cases of brachial plexus injury requires a detailed anatomical understanding of the C₇ spinal nerve.</p> <p><bold>AIM</bold>: This study aimed to identify distinctive length characteristics of the C₇ spinal nerve, middle trunk, and its anterior division before and after epineurium removal.</p> <p><bold>MATERIAL</bold><bold> </bold><bold>AND</bold><bold> </bold><bold>METHODS</bold>: To identify significant differences, the lengths of the C₇ spinal nerve, middle trunk, and its anterior division were measured twice in the anterior projection, before and after epineurium removal, in 121 brachial plexus specimens from male and female cadavers aged 40 to 97 years. Minimum and maximum values, medians, and quartiles (Q1; Q3) were recorded in the database. Statistical significance of differences in absolute nerve lengths and in the proportion of brachial plexus specimens with measured changes after epineurium removal was determined using the Mann–Whitney U test and Pearson’s χ<sup>2</sup> test.</p> <p><bold>RESULTS</bold>: The median lengths before epineurium removal were as follows: C₇ spinal nerve, 25 (20; 30) mm; middle trunk, 22 (17; 28) mm; anterior division, 20 (15; 26.5) mm. After epineurium removal, the respective values were 28 (25; 32) mm, 20 (15; 27) mm, and 25.5 (20; 37) mm. The total length of the C₇ spinal nerve, middle trunk, and its anterior division ranged from 30 to 111 mm before epineurium removal (median: 71 [63; 78] mm), and from 30 to 146 mm after removal (median: 75 [66; 85] mm). After epineurium removal, the total length of the C₇ spinal nerve, middle trunk, and its anterior division remained unchanged in only 3.3% of cases, decreased by 1–35 mm in 15.7%, and increased by 1–72 mm in 81%. Lengths exceeding 100 mm were found in 1.6% of specimens before and in 11.6% after epineurium removal.</p> <p><bold>CONCLUSION</bold>: In 81% of cases, removal of the epineurium resulted in an increased total length of the C₇ spinal nerve, middle trunk, and its anterior division, which may reduce the distance required for contralateral nerve transfer by up to 72 mm.</p></abstract><trans-abstract xml:lang="ru"><p><bold>Актуальность</bold>.<bold> </bold>Контралатеральный перенос нервов-доноров при повреждении плечевого сплетения требует детальных знаний анатомии спинномозгового нерва С<sub>7</sub>.</p> <p><bold>Цель</bold>.<bold> </bold>Выявить отличительные особенности протяжённости спинномозгового нерва С<sub>7</sub>, среднего ствола и его переднего разделения до и после удаления эпиневрия.</p> <p><bold>Материал и методы</bold>.<bold> </bold>Для выявления значимых различий на 121-м препарате плечевого сплетения трупов мужчин и женщин 40–97 лет дважды в передней проекции измерили длину спинномозгового нерва С<sub>7</sub>, среднего ствола, его переднего разделения до и после удаления эпиневрия. В базе данных отражены минимальные и максимальные значения, медиана и квартили (Q1; Q3), а значимость различий между абсолютными показателями длины и долевым соотношением препаратов плечевого сплетения с установленной длиной нервов после удаления эпиневрия определены по U-тесту Манна–Уитни и критерию χ<sup>2</sup><sup> </sup>Пирсона.</p> <p><bold>Результаты</bold>.<bold> </bold>Длина спинномозгового нерва С<sub>7</sub><sub> </sub>составляет 25 (20; 30) мм, среднего ствола — 22 (17; 28) мм, переднего разделения — 20 (15; 26,5) мм, а после удаления эпиневрия — 28 (25; 32) мм, 20 (15; 27) мм и 25,5 (20; 37) мм соответственно. Общая длина спинномозгового нерва С<sub>7</sub>, среднего ствола и его переднего разделения колеблется в пределах от 30 до 111 мм, медиана составляет 71 (63; 78) мм, а после удаления эпиневрия — 30–146 мм и 75 (66; 85) мм. После удаления эпиневрия общая длина спинномозгового нерва С<sub>7</sub>, среднего ствола и его переднего разделения остается неизменной только в 3,3% случаев, в 15,7% становится меньше на 1–35 мм, а в 81% — больше на 1–72 мм. Наибольшие значения (более 100 мм) общей длины изучаемых образований встречаются в 1,6%, а после удаления эпиневрия — 11,6%.</p> <p><bold>Заключение</bold>.<bold> </bold>После удаления<bold> </bold>эпиневрия<bold> </bold>в 81% случаев общая длина спинномозгового нерва С<sub>7</sub>, среднего ствола и его переднего разделения больше, что позволяет уменьшить диастаз при контралатеральном переносе до 72 мм.</p></trans-abstract><kwd-group xml:lang="en"><kwd>brachial plexus</kwd><kwd>C₇ spinal nerve</kwd><kwd>middle trunk</kwd><kwd>anterior division</kwd><kwd>epineurium</kwd><kwd>contralateral transfer</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>плечевое сплетение</kwd><kwd>спинномозговой нерв С7</kwd><kwd>средний ствол</kwd><kwd>переднее разделение</kwd><kwd>эпиневрий</kwd><kwd>контралатеральный перенос</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Ali AE, Saleh WR, Ragheb YF, Heussin MAF. 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