{"id":121,"date":"2025-08-11T00:28:00","date_gmt":"2025-08-11T00:28:00","guid":{"rendered":"https:\/\/admin-wp-hm.elsevier.com\/es\/?p=121"},"modified":"2025-08-11T12:10:54","modified_gmt":"2025-08-11T12:10:54","slug":"sistema-simpatico","status":"publish","type":"post","link":"https:\/\/studenthub.elsevier.com\/es\/temas-basicos-de-anatomia\/sistema-simpatico\/","title":{"rendered":"Sistema simp\u00e1tico"},"content":{"rendered":"\n<p>La parte simp\u00e1tica de la divisi\u00f3n aut\u00f3noma del SNP abandona las regiones toracolumbares de la m\u00e9dula espinal con los componentes som\u00e1ticos de los nervios espinales T1 a L2 (ver imagen destacada). A cada lado, un tronco simp\u00e1tico paravertebral se extiende desde la base del cr\u00e1neo hasta el l\u00edmite inferior de la columna vertebral, donde los dos troncos convergen anteriormente al c\u00f3ccix en el ganglio impar. Cada tronco est\u00e1 unido a los ramos anteriores de los nervios espinales y se convierte en la ruta a trav\u00e9s de la cual el simp\u00e1tico se distribuye a la periferia y a todas las v\u00edsceras. Las fibras preganglionares motoras viscerales abandonan la parte de la m\u00e9dula espinal entre T1 y L2 en las ra\u00edces anteriores.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"386\" height=\"425\" src=\"https:\/\/studenthub.elsevier.com\/es\/wp-content\/uploads\/sites\/11\/2025\/06\/Sistema-simpatico.png?w=386\" alt=\"Sstema simp\u00e1tico\" class=\"wp-image-304\" style=\"width:490px;height:auto\" srcset=\"https:\/\/studenthub.elsevier.com\/es\/wp-content\/uploads\/sites\/11\/2025\/06\/Sistema-simpatico.png 386w, https:\/\/studenthub.elsevier.com\/es\/wp-content\/uploads\/sites\/11\/2025\/06\/Sistema-simpatico.png?resize=272,300 272w\" sizes=\"auto, (max-width: 386px) 100vw, 386px\" \/><\/figure>\n\n\n\n<p><em>Fig. 1.42: Sistema simp\u00e1tico. Parte simp\u00e1tica de la divisi\u00f3n aut\u00f3noma del SNP. Drake, Mitchell &amp; Vogl. Gray. Anatom\u00eda para estudiantes, 4\u00aa Ed. 2020. \u00a9 Elsevier.<\/em><\/p>\n\n\n\n<p>Las fibras entran entonces en los nervios espinales, pasan a trav\u00e9s de los ramos anteriores y van a los troncos simp\u00e1ticos. Cada tronco est\u00e1 localizado a cada lado de la columna vertebral (paravertebral) y situado anterior a los ramos anteriores. A lo largo del tronco se encuentra una serie de ganglios dispuestos&nbsp; segmentariamente formados a partir de colecciones de cuerpos de neuronas posganglionares, donde las neuronas preganglionares hacen sinapsis con las neuronas posganglionares. Los ramos anteriores desde T1 a L2 est\u00e1n conectados con el tronco simp\u00e1tico, o con un ganglio, por un ramo comunicante blanco, el cual lleva fibras simp\u00e1ticas preganglionares y tiene aspecto blanco porque las fibras que contiene est\u00e1n cubiertas por mielina.<\/p>\n\n\n\n<p>Las fibras simp\u00e1ticas preganglionares que entran en el ganglio paravertebral o en el tronco simp\u00e1tico a trav\u00e9s del ramo comunicante blanco pueden seguir cuatro rutas hasta los tejidos diana.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>La parte simp\u00e1tica de la divisi\u00f3n aut\u00f3noma del SNP abandona las regiones toracolumbares de la m\u00e9dula espinal con los componentes som\u00e1ticos de los nervios espinales T1 a L2 (ver imagen destacada). A cada lado, un tronco simp\u00e1tico paravertebral se extiende desde la base del cr\u00e1neo hasta el l\u00edmite inferior de la columna vertebral, donde los [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":812,"comment_status":"closed","ping_status":"open","sticky":false,"template":"wp-custom-template-individual-entry-fundamentos-de-anatom-a","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[13],"tags":[],"class_list":["post-121","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-temas-basicos-de-anatomia"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Sistema simp\u00e1tico - Student Hub Spain<\/title>\n<meta name=\"description\" content=\"Potencia tu aprendizaje: &#039;Temas b\u00e1sicos de anatom\u00eda&#039;. 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