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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="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">microcirculation</journal-id><journal-title-group><journal-title xml:lang="ru">Регионарное кровообращение и микроциркуляция</journal-title><trans-title-group xml:lang="en"><trans-title>Regional blood circulation and microcirculation</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1682-6655</issn><issn pub-type="epub">2712-9756</issn><publisher><publisher-name>Academician I.P. Pavlov First St. Petersburg State Medical University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.24884/1682-6655-2016-15-2-45-50</article-id><article-id custom-type="elpub" pub-id-type="custom">microcirculation-68</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="ru"><subject>ОРИГИНАЛЬНЫЕ СТАТЬИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ORIGINAL ARTICLES (CLINICAL INVESTIGATIONS)</subject></subj-group></article-categories><title-group><article-title>Анализ механизма возрастного снижения скорости мозгового кровотока</article-title><trans-title-group xml:lang="en"><trans-title>Analysis of the causes of age-related decline in the velocity of cerebral blood flow</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Щуров</surname><given-names>В. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Schurov</surname><given-names>V. A.</given-names></name></name-alternatives><email xlink:type="simple">shchurovland@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФГБУ «Восстановительная травматология и ортопедия» им. акад. Г. А. Илизарова</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Federal State Budgetary Institution Russian Ilizarov Scientific Center «Restorative Traumatology and Orthopaedics»</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2016</year></pub-date><pub-date pub-type="epub"><day>30</day><month>06</month><year>2016</year></pub-date><volume>15</volume><issue>2</issue><fpage>45</fpage><lpage>50</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Щуров В.А., 2016</copyright-statement><copyright-year>2016</copyright-year><copyright-holder xml:lang="ru">Щуров В.А.</copyright-holder><copyright-holder xml:lang="en">Schurov V.A.</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.microcirc.ru/jour/article/view/68">https://www.microcirc.ru/jour/article/view/68</self-uri><abstract><p>Цель работы - определение причин возрастного снижения скорости кровотока (СК) по средней мозговой артерии (СМА) у здоровых людей и у больных при оперативном удлинении отстающих в росте конечностей. Материал и методы исследования. СК по СМА определялась методом транскраниальной допплерографии. Проведен анализ изменения показателя при функциональной мышечной пробе у 30 практически здоровых людей 18-60 лет и 30 больных 3-62 лет с отставанием в росте одной из нижних конечностей в процессе ее оперативного удлинения. В качестве показателя ауторегуляции мозгового кровотока использован размах изменений показателей СК при повторном проведении мышечной функциональной пробы. Результаты исследования. Выявлено возрастное снижение скорости кровотока по средней мозговой артерии, более выраженное у больных с патологией опорно-двигательной системы. В то же время средняя величина размаха изменений показателя скорости кровотока при проведении функциональной пробы у здоровых людей старше 10 лет, а также у больных до лечения и в период фиксации остается стабильной (17-25 %). Выводы. Возрастное снижение СК по СМА является необходимым условием для сохранения церебральной ауторегуляции, при нарушении которой у пациентов при дистракции конечности значительно снижается их работоспособность.</p></abstract><trans-abstract xml:lang="en"><p>Goal. Determining the causes of age-related decrease of blood flow velocity (BFV) in the middle cerebral artery (MCA) in healthy subjects and in patients during surgical lengthening of stunted limbs. Methods. BFV in MCA was determined by transcranial Doppler. The analysis of the indicator in functional muscle sample of 30 healthy people 18-60 years old and 30 patients 3-62 years of lagging in the growth of one of the lower limbs in the course of its operational extension. As an indicator of cerebral autoregulation used swing changes BFV indicators during the second holding muscle functional test. Results. The age-related reduction in flow rate in the middle cerebral artery was more pronounced in patients with disorders of the musculoskeletal system. At the same time, the average value of the magnitude of blood flow velocity index changes during the functional test in healthy individuals older than 10 years, as well as in patients before treatment and during the fixation is stable (17-25 %). Conclusion. Age-related decline in the BFV at MCA is a prerequisite for the preservation of cerebral autoregulation. Disorders of cerebral autoregulation in patients undergoing distraction of limbs greatly reduces their tolerance to physical exercise.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>кровоснабжение мозга</kwd><kwd>удлинение конечностей</kwd><kwd>адаптация</kwd><kwd>работоспособность</kwd><kwd>blood flow to the brain</kwd><kwd>limb lengthening</kwd><kwd>adaptation</kwd><kwd>performance</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">Андреева Ю. В., Вайнштейн Г. Б., Семерия В. Н. Исследования изменений мозгового кровотока и цереброваскулярной реактивности в период позднего постнатального онтогенеза // Журн. эволюц. биохим. и физиол. 2013. Т. 49. № 6. С. 457-459.</mixed-citation><mixed-citation xml:lang="en">Андреева Ю. В., Вайнштейн Г. Б., Семерия В. Н. 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