{"id":24055,"date":"2024-01-05T23:00:00","date_gmt":"2024-01-05T23:00:00","guid":{"rendered":"https:\/\/www.africa-press.net\/benin\/politique\/chaque-nuit-notre-cerveau-trie-ses-dechets"},"modified":"2024-01-05T23:25:08","modified_gmt":"2024-01-05T23:25:08","slug":"chaque-nuit-notre-cerveau-trie-ses-dechets","status":"publish","type":"post","link":"https:\/\/www.africa-press.net\/benin\/toutes-les-actualites\/chaque-nuit-notre-cerveau-trie-ses-dechets","title":{"rendered":"Chaque Nuit, Notre Cerveau Trie Ses De\u0301chets"},"content":{"rendered":"<p><span style=\"color: #ff6600\"><strong>Africa-Press &#8211; Benin. <\/strong><\/span>Pourquoi passons-nous un tiers de notre vie a\u0300 dormir ? De nombreuses e\u0301tudes pointent l&rsquo;impact du sommeil sur l&rsquo;apprentissage et la me\u0301morisation. Mais une autre fonction vitale du sommeil, l&rsquo;e\u0301limination des de\u0301chets du cerveau, a e\u0301te\u0301 de\u0301couverte en 2013 par l&rsquo;e\u0301quipe de Maiken Nedergaard, neuroscientifique des universite\u0301s de Rochester (E\u0301tats-Unis) et de Copenhague (Danemark). Toutes les cellules de notre corps produisent en effet des de\u0301chets dont l&rsquo;accumulation est toxique. Celles de notre cerveau ne font pas exception.<\/p>\n<p>Parmi ces de\u0301po\u0302ts figurent notamment les prote\u0301ines be\u0302ta-amyloi\u0308des, dont l&rsquo;agre\u0301gation est l&rsquo;une des caracte\u0301ristiques de la maladie d&rsquo;Alzheimer. Ailleurs dans le corps, un syste\u0300me tre\u0300s efficace, le re\u0301seau lymphatique, draine les de\u0301chets des cellules vers les ganglions lymphatiques et le syste\u0300me veineux. Mais le cerveau est de\u0301pourvu de tels vaisseaux.<\/p>\n<p><b>Le volume de l&rsquo;espace interstitiel augmente de 60 % pendant le sommeil<\/b><\/p>\n<p>Maiken Nedergaard a d&rsquo;abord de\u0301montre\u0301 l&rsquo;existence d&rsquo;un re\u0301seau de nettoyage propre au cerveau, le syste\u0300me glymphatique, ainsi nomme\u0301 car il est active\u0301 via des cellules autres que les neurones, les cellules gliales. Ce syste\u0300me permet au liquide ce\u0301re\u0301brospinal, produit dans des ventricules a\u0300 la base du cerveau, de pe\u0301ne\u0301trer dans le cortex &#8211; ou\u0300 il alimente le liquide interstitiel qui baigne les neurones &#8211; et d&rsquo;en sortir pour en e\u0301vacuer les de\u0301chets.<\/p>\n<p>L&rsquo;e\u0301quipe de Maiken Nedergaard a ensuite de\u0301couvert que le volume de l&rsquo;espace interstitiel augmente de 60 % pendant le sommeil, facilitant l&rsquo;e\u0301coulement du liquide. Autrement dit, le sommeil permet d&rsquo;e\u0301liminer massivement les de\u0301chets dus a\u0300 l&rsquo;activite\u0301 des neurones. Cette de\u0301couverte soule\u0300ve l&rsquo;espoir de trouver des traitements pour des maladies neurode\u0301ge\u0301ne\u0301ratives comme celle d&rsquo;Alzheimer, en agissant sur les troubles du sommeil. Selon de re\u0301cents travaux, traiter l&rsquo;apne\u0301e du sommeil repousserait ainsi de dix ans la survenue de la maladie. Et c&rsquo;est pendant le sommeil lent profond que le syste\u0300me glymphatique serait le plus efficace.<\/p>\n<p>Par Marie-Laure The\u0301odule<\/p>\n<p><strong>Pour plus d&rsquo;informations et d&rsquo;analyses sur la <a href=\"https:\/\/www.africa-press.net\/benin\">Benin<\/a>, suivez <a href=\"https:\/\/www.africa-press.net\/\">Africa-Press<\/a><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Africa-Press &#8211; Benin. Pourquoi passons-nous un tiers de notre vie a\u0300 dormir ? De nombreuses e\u0301tudes pointent l&rsquo;impact du sommeil sur l&rsquo;apprentissage et la me\u0301morisation. Mais une autre fonction vitale du sommeil, l&rsquo;e\u0301limination des de\u0301chets du cerveau, a e\u0301te\u0301 de\u0301couverte en 2013 par l&rsquo;e\u0301quipe de Maiken Nedergaard, neuroscientifique des universite\u0301s de Rochester (E\u0301tats-Unis) et de [&hellip;]<\/p>\n","protected":false},"author":82,"featured_media":24054,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22,10],"tags":[36,50,45],"class_list":["post-24055","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-divers","category-toutes-les-actualites","tag-africa-press","tag-africa-press-benin","tag-benin"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.1 (Yoast SEO v27.0) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Chaque Nuit, Notre Cerveau Trie Ses De\u0301chets - B\u00e9nin<\/title>\n<meta name=\"description\" content=\"Pourquoi passons-nous un tiers de notre vie a\u0300 dormir ? 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