{"id":6683,"date":"2026-04-16T13:54:10","date_gmt":"2026-04-16T10:54:10","guid":{"rendered":"https:\/\/wiki.dev.voka.io\/glossary\/dura-mater\/"},"modified":"2026-05-04T16:14:00","modified_gmt":"2026-05-04T13:14:00","slug":"dura-mater","status":"publish","type":"glossary_item","link":"https:\/\/wiki.dev.voka.io\/pt\/glossario\/dura-mater\/","title":{"rendered":"Dura-m\u00e1ter"},"content":{"rendered":"\n<p>A dura-m\u00e1ter (lat. <em>dura mater, <\/em>gr<em>. pachymeninx<\/em>) \u00e9 a mais externa, espessa e resistente das tr\u00eas meninges que protegem o c\u00e9rebro e a medula espinhal. <\/p>\n\n<p>Ela se apresenta como um saco fibroso denso e n\u00e3o el\u00e1stico, revestindo o interior da cavidade craniana e servindo como uma barreira robusta entre os ossos e os delicados tecidos nervosos.<\/p>\n\n<h2 class=\"wp-block-heading\" id=\"h-&#x44D;&#x442;&#x438;&#x43E;&#x43B;&#x43E;&#x433;&#x438;&#x44F;-&#x438;-&#x43F;&#x430;&#x442;&#x43E;&#x444;&#x438;&#x437;&#x438;&#x43E;&#x43B;&#x43E;&#x433;&#x438;&#x44F;\"><strong>Etiologia e fisiopatologia<\/strong><\/h2>\n\n<p>No n\u00edvel cerebral, essa membrana possui uma estrutura \u00fanica em dois n\u00edveis. A camada externa est\u00e1 intimamente aderida \u00e0s superf\u00edcies internas dos ossos do cr\u00e2nio, funcionando como um peri\u00f3steo interno, enquanto a camada interna se orienta para o c\u00e9rebro. A camada interna est\u00e1 voltada para o c\u00e9rebro. Em \u00e1reas determinadas, essas duas camadas se separam, formando canais triangulares r\u00edgidos \u2014 os seios venosos, que drenam o sangue pobre em oxig\u00eanio do c\u00e9rebro para as veias jugulares no pesco\u00e7o.<\/p>\n\n<p>Al\u00e9m disso, a camada interna forma poderosas septas (ou processos) que se projetam profundamente nas fendas entre as divis\u00f5es do c\u00e9rebro. Os maiores desses septos incluem o falx cerebri, que divide os hemisf\u00e9rios cerebrais direito e esquerdo, e o tentorium cerebelli, que separa os lobos occipitais da fossa craniana posterior. Esses septos ancoram firmemente o c\u00e9rebro, prevenindo seu deslocamento cr\u00edtico durante movimentos bruscos da cabe\u00e7a.<\/p>\n\n<h2 class=\"wp-block-heading\" id=\"h-&#x43A;&#x43B;&#x438;&#x43D;&#x438;&#x447;&#x435;&#x441;&#x43A;&#x43E;&#x435;-&#x437;&#x43D;&#x430;&#x447;&#x435;&#x43D;&#x438;&#x435;\"><strong>Import\u00e2ncia cl\u00ednica<\/strong><\/h2>\n\n<p>A dura-m\u00e1ter \u00e9 ricamente inervada por ramos do nervo trig\u00eameo. O pr\u00f3prio c\u00e9rebro n\u00e3o possui receptores de dor, portanto, quase toda dor de cabe\u00e7a severa (inclusive por trauma ou meningite) est\u00e1 associada \u00e0 tens\u00e3o mec\u00e2nica ou irrita\u00e7\u00e3o qu\u00edmica da dura-m\u00e1ter.<\/p>\n\n<p>Na traumatologia, dois espa\u00e7os associados a essa estrutura s\u00e3o de import\u00e2ncia cr\u00edtica. O espa\u00e7o entre o osso e a dura-m\u00e1ter (epidural) normalmente n\u00e3o existe, mas, no caso de rompimento de uma art\u00e9ria, sangue \u00e9 for\u00e7ado sob alta press\u00e3o, separando a camada da dura-m\u00e1ter do osso. O espa\u00e7o sob a dura-m\u00e1ter (subdural) \u00e9 um local de ac\u00famulo de sangue venoso ap\u00f3s o rompimento de veias ponte na patog\u00eanese de hematomas subdurais. Ambas as condi\u00e7\u00f5es requerem interven\u00e7\u00e3o neurocir\u00fargica de emerg\u00eancia.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A dura-m\u00e1ter (lat. <em>dura mater<\/em>, gr. <em>pachymeninx<\/em>) \u00e9 a mais externa, espessa e resistente das tr\u00eas meninges que protegem o c\u00e9rebro e a medula espinhal. <\/p>\n","protected":false},"featured_media":0,"template":"","class_list":["post-6683","glossary_item","type-glossary_item","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v25.0 (Yoast SEO v26.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Dura-m\u00e1ter: defini\u00e7\u00e3o m\u00e9dica e vis\u00e3o geral | Voka Wiki<\/title>\n<meta name=\"description\" content=\"A dura-m\u00e1ter (lat. dura mater, gr. pachymeninx) \u00e9 a mais externa, espessa e resistente das tr\u00eas meninges que protegem o c\u00e9rebro e a medula espinhal.\" \/>\n<meta name=\"robots\" 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