{"id":24805,"date":"2022-09-18T15:51:56","date_gmt":"2022-09-18T15:51:56","guid":{"rendered":"https:\/\/www.africa-press.net\/mali\/politique\/pourquoi-le-cerveau-humain-est-devenu-si-gros"},"modified":"2022-09-18T17:14:08","modified_gmt":"2022-09-18T17:14:08","slug":"pourquoi-le-cerveau-humain-est-devenu-si-gros","status":"publish","type":"post","link":"https:\/\/www.africa-press.net\/mali\/homepage-french\/pourquoi-le-cerveau-humain-est-devenu-si-gros","title":{"rendered":"Pourquoi le cerveau humain est devenu si gros ?"},"content":{"rendered":"<p><span style=\"color: #ff6600\"><strong>Africa-Press &#8211; Mali. <\/strong><\/span>Le cerveau humain et son \u00e9volution int\u00e9ressent les scientifiques depuis longtemps. Une \u00e9tude r\u00e9cente met en lumi\u00e8re le r\u00f4le d\u2019un g\u00e8ne responsable qui a permis au cerveau humain de devenir si gros.<\/p>\n<p>Pourquoi notre cerveau est-il si gros par rapport \u00e0 notre taille ? En effet, le cerveau humain bat celui de tous les mammif\u00e8res lorsque l\u2019on consid\u00e8re son coefficient d\u2019enc\u00e9phalisation. Il est sept fois plus massif que la masse th\u00e9orique calcul\u00e9e pour un animal d\u2019une masse corporelle \u00e9quivalente. Une partie de la r\u00e9ponse \u00e0 cette vaste question r\u00e9side dans la pr\u00e9sence d\u2019un g\u00e8ne strictement humain : ARHGAP11B. Ce dernier est impliqu\u00e9 dans l\u2019expansion du n\u00e9ocortex, la r\u00e9gion c\u00e9r\u00e9brale la plus jeune d\u2019un point de vue \u00e9volutif.<\/p>\n<p>Le g\u00e8ne responsable de l\u2019expansion du cerveau<\/p>\n<p>Des scientifiques du German Primate Center ont introduit le g\u00e8ne ARHGAP11B dans des organo\u00efdes de chimpanz\u00e9s. Ces organes synth\u00e9tiques obtenus en laboratoire reproduisent, de fa\u00e7on simplifi\u00e9e, la structure du cerveau et permettent de ne pas faire d\u2019exp\u00e9riences sur des animaux vivants. \u00ab Notre \u00e9tude montre que ce g\u00e8ne dans les organo\u00efdes de chimpanz\u00e9 cause une augmentation du nombre de cellules souches c\u00e9r\u00e9brales et de neurones qui jouent un r\u00f4le crucial dans les extraordinaires capacit\u00e9s mentales des humains \u00bb, explique Michael Heide, premier auteur de l\u2019\u00e9tude parue dans EMBO Reports.<\/p>\n<p>En revanche, si le g\u00e8ne ARHGAP11B est absent dans les organo\u00efdes humains, le nombre de cellules souches c\u00e9r\u00e9brales retombe au m\u00eame niveau que chez les chimpanz\u00e9s. \u00ab Nous avons donc \u00e9t\u00e9 capables de montrer que ARHGAP11B joue un r\u00f4le important dans le d\u00e9veloppement du n\u00e9ocortex durant l\u2019\u00e9volution humaine \u00bb, conclut Michael Heide.<\/p>\n<p><strong>Pour plus d&rsquo;informations et d&rsquo;analyses sur la <a href=\"https:\/\/www.africa-press.net\/mali\">Mali<\/a>, suivez <a href=\"https:\/\/www.africa-press.net\/\">Africa-Press<\/a><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Africa-Press &#8211; Mali. Le cerveau humain et son \u00e9volution int\u00e9ressent les scientifiques depuis longtemps. Une \u00e9tude r\u00e9cente met en lumi\u00e8re le r\u00f4le d\u2019un g\u00e8ne responsable qui a permis au cerveau humain de devenir si gros. Pourquoi notre cerveau est-il si gros par rapport \u00e0 notre taille ? En effet, le cerveau humain bat celui de [&hellip;]<\/p>\n","protected":false},"author":82,"featured_media":24804,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[14,11,17],"tags":[76,86,19],"class_list":["post-24805","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-divers","category-homepage-french","category-toutes-les-actualites","tag-africa-press","tag-africa-press-mali","tag-mali"],"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>Pourquoi le cerveau humain est devenu si gros ? - Mali<\/title>\n<meta name=\"description\" content=\"Le cerveau humain et son \u00e9volution int\u00e9ressent les scientifiques depuis longtemps. Une \u00e9tude r\u00e9cente met en lumi\u00e8re le r ...\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.africa-press.net\/mali\/homepage-french\/pourquoi-le-cerveau-humain-est-devenu-si-gros\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Pourquoi le cerveau humain est devenu si gros ?\" \/>\n<meta property=\"og:description\" content=\"Le cerveau humain et son \u00e9volution int\u00e9ressent les scientifiques depuis longtemps. Une \u00e9tude r\u00e9cente met en lumi\u00e8re le r ...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.africa-press.net\/mali\/homepage-french\/pourquoi-le-cerveau-humain-est-devenu-si-gros\" \/>\n<meta property=\"og:site_name\" content=\"Mali\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/AfricaPressTunisiaa\" \/>\n<meta property=\"article:published_time\" content=\"2022-09-18T15:51:56+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2022-09-18T17:14:08+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/static.africa-press.net\/mali\/sites\/21\/2022\/09\/postQueueImg_6-632751c1a67b2.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1520\" \/>\n\t<meta property=\"og:image:height\" content=\"1138\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"cfeditorfr\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"cfeditorfr\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.africa-press.net\/mali\/homepage-french\/pourquoi-le-cerveau-humain-est-devenu-si-gros#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.africa-press.net\/mali\/homepage-french\/pourquoi-le-cerveau-humain-est-devenu-si-gros\"},\"author\":{\"name\":\"cfeditorfr\",\"@id\":\"https:\/\/www.africa-press.net\/mali\/#\/schema\/person\/2b1cf3cd81a31e3cd26889ca66d677f1\"},\"headline\":\"Pourquoi le cerveau humain est devenu si gros ?\",\"datePublished\":\"2022-09-18T15:51:56+00:00\",\"dateModified\":\"2022-09-18T17:14:08+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.africa-press.net\/mali\/homepage-french\/pourquoi-le-cerveau-humain-est-devenu-si-gros\"},\"wordCount\":336,\"commentCount\":0,\"image\":{\"@id\":\"https:\/\/www.africa-press.net\/mali\/homepage-french\/pourquoi-le-cerveau-humain-est-devenu-si-gros#primaryimage\"},\"thumbnailUrl\":\"https:\/\/static.africa-press.net\/mali\/sites\/21\/2022\/09\/postQueueImg_6-632751c1a67b2.jpg\",\"keywords\":[\"Africa Press\",\"Africa Press-Mali\",\"mali\"],\"articleSection\":[\"Divers\",\"homepage-french\",\"Toutes les actualit\u00e9s\"],\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.africa-press.net\/mali\/homepage-french\/pourquoi-le-cerveau-humain-est-devenu-si-gros#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.africa-press.net\/mali\/homepage-french\/pourquoi-le-cerveau-humain-est-devenu-si-gros\",\"url\":\"https:\/\/www.africa-press.net\/mali\/homepage-french\/pourquoi-le-cerveau-humain-est-devenu-si-gros\",\"name\":\"Pourquoi le cerveau humain est devenu si gros ? - Mali\",\"isPartOf\":{\"@id\":\"https:\/\/www.africa-press.net\/mali\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.africa-press.net\/mali\/homepage-french\/pourquoi-le-cerveau-humain-est-devenu-si-gros#primaryimage\"},\"image\":{\"@id\":\"https:\/\/www.africa-press.net\/mali\/homepage-french\/pourquoi-le-cerveau-humain-est-devenu-si-gros#primaryimage\"},\"thumbnailUrl\":\"https:\/\/static.africa-press.net\/mali\/sites\/21\/2022\/09\/postQueueImg_6-632751c1a67b2.jpg\",\"datePublished\":\"2022-09-18T15:51:56+00:00\",\"dateModified\":\"2022-09-18T17:14:08+00:00\",\"author\":{\"@id\":\"https:\/\/www.africa-press.net\/mali\/#\/schema\/person\/2b1cf3cd81a31e3cd26889ca66d677f1\"},\"description\":\"Le cerveau humain et son \u00e9volution int\u00e9ressent les scientifiques depuis longtemps. Une \u00e9tude r\u00e9cente met en lumi\u00e8re le r ...\",\"breadcrumb\":{\"@id\":\"https:\/\/www.africa-press.net\/mali\/homepage-french\/pourquoi-le-cerveau-humain-est-devenu-si-gros#breadcrumb\"},\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.africa-press.net\/mali\/homepage-french\/pourquoi-le-cerveau-humain-est-devenu-si-gros\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"fr-FR\",\"@id\":\"https:\/\/www.africa-press.net\/mali\/homepage-french\/pourquoi-le-cerveau-humain-est-devenu-si-gros#primaryimage\",\"url\":\"https:\/\/static.africa-press.net\/mali\/sites\/21\/2022\/09\/postQueueImg_6-632751c1a67b2.jpg\",\"contentUrl\":\"https:\/\/static.africa-press.net\/mali\/sites\/21\/2022\/09\/postQueueImg_6-632751c1a67b2.jpg\",\"width\":1520,\"height\":1138,\"caption\":\"Pourquoi le cerveau humain est devenu si gros ?\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.africa-press.net\/mali\/homepage-french\/pourquoi-le-cerveau-humain-est-devenu-si-gros#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/www.africa-press.net\/mali\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Pourquoi le cerveau humain est devenu si gros ?\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.africa-press.net\/mali\/#website\",\"url\":\"https:\/\/www.africa-press.net\/mali\/\",\"name\":\"Mali\",\"description\":\"Just another Africa News Agency Sites site\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.africa-press.net\/mali\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"fr-FR\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.africa-press.net\/mali\/#\/schema\/person\/2b1cf3cd81a31e3cd26889ca66d677f1\",\"name\":\"cfeditorfr\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"Pourquoi le cerveau humain est devenu si gros ? - Mali","description":"Le cerveau humain et son \u00e9volution int\u00e9ressent les scientifiques depuis longtemps. Une \u00e9tude r\u00e9cente met en lumi\u00e8re le r ...","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.africa-press.net\/mali\/homepage-french\/pourquoi-le-cerveau-humain-est-devenu-si-gros","og_locale":"fr_FR","og_type":"article","og_title":"Pourquoi le cerveau humain est devenu si gros ?","og_description":"Le cerveau humain et son \u00e9volution int\u00e9ressent les scientifiques depuis longtemps. Une \u00e9tude r\u00e9cente met en lumi\u00e8re le r ...","og_url":"https:\/\/www.africa-press.net\/mali\/homepage-french\/pourquoi-le-cerveau-humain-est-devenu-si-gros","og_site_name":"Mali","article_publisher":"https:\/\/www.facebook.com\/AfricaPressTunisiaa","article_published_time":"2022-09-18T15:51:56+00:00","article_modified_time":"2022-09-18T17:14:08+00:00","og_image":[{"width":1520,"height":1138,"url":"https:\/\/static.africa-press.net\/mali\/sites\/21\/2022\/09\/postQueueImg_6-632751c1a67b2.jpg","type":"image\/jpeg"}],"author":"cfeditorfr","twitter_card":"summary_large_image","twitter_misc":{"\u00c9crit par":"cfeditorfr","Dur\u00e9e de lecture estim\u00e9e":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.africa-press.net\/mali\/homepage-french\/pourquoi-le-cerveau-humain-est-devenu-si-gros#article","isPartOf":{"@id":"https:\/\/www.africa-press.net\/mali\/homepage-french\/pourquoi-le-cerveau-humain-est-devenu-si-gros"},"author":{"name":"cfeditorfr","@id":"https:\/\/www.africa-press.net\/mali\/#\/schema\/person\/2b1cf3cd81a31e3cd26889ca66d677f1"},"headline":"Pourquoi le cerveau humain est devenu si gros ?","datePublished":"2022-09-18T15:51:56+00:00","dateModified":"2022-09-18T17:14:08+00:00","mainEntityOfPage":{"@id":"https:\/\/www.africa-press.net\/mali\/homepage-french\/pourquoi-le-cerveau-humain-est-devenu-si-gros"},"wordCount":336,"commentCount":0,"image":{"@id":"https:\/\/www.africa-press.net\/mali\/homepage-french\/pourquoi-le-cerveau-humain-est-devenu-si-gros#primaryimage"},"thumbnailUrl":"https:\/\/static.africa-press.net\/mali\/sites\/21\/2022\/09\/postQueueImg_6-632751c1a67b2.jpg","keywords":["Africa Press","Africa Press-Mali","mali"],"articleSection":["Divers","homepage-french","Toutes les actualit\u00e9s"],"inLanguage":"fr-FR","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/www.africa-press.net\/mali\/homepage-french\/pourquoi-le-cerveau-humain-est-devenu-si-gros#respond"]}]},{"@type":"WebPage","@id":"https:\/\/www.africa-press.net\/mali\/homepage-french\/pourquoi-le-cerveau-humain-est-devenu-si-gros","url":"https:\/\/www.africa-press.net\/mali\/homepage-french\/pourquoi-le-cerveau-humain-est-devenu-si-gros","name":"Pourquoi le cerveau humain est devenu si gros ? - Mali","isPartOf":{"@id":"https:\/\/www.africa-press.net\/mali\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.africa-press.net\/mali\/homepage-french\/pourquoi-le-cerveau-humain-est-devenu-si-gros#primaryimage"},"image":{"@id":"https:\/\/www.africa-press.net\/mali\/homepage-french\/pourquoi-le-cerveau-humain-est-devenu-si-gros#primaryimage"},"thumbnailUrl":"https:\/\/static.africa-press.net\/mali\/sites\/21\/2022\/09\/postQueueImg_6-632751c1a67b2.jpg","datePublished":"2022-09-18T15:51:56+00:00","dateModified":"2022-09-18T17:14:08+00:00","author":{"@id":"https:\/\/www.africa-press.net\/mali\/#\/schema\/person\/2b1cf3cd81a31e3cd26889ca66d677f1"},"description":"Le cerveau humain et son \u00e9volution int\u00e9ressent les scientifiques depuis longtemps. Une \u00e9tude r\u00e9cente met en lumi\u00e8re le r ...","breadcrumb":{"@id":"https:\/\/www.africa-press.net\/mali\/homepage-french\/pourquoi-le-cerveau-humain-est-devenu-si-gros#breadcrumb"},"inLanguage":"fr-FR","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.africa-press.net\/mali\/homepage-french\/pourquoi-le-cerveau-humain-est-devenu-si-gros"]}]},{"@type":"ImageObject","inLanguage":"fr-FR","@id":"https:\/\/www.africa-press.net\/mali\/homepage-french\/pourquoi-le-cerveau-humain-est-devenu-si-gros#primaryimage","url":"https:\/\/static.africa-press.net\/mali\/sites\/21\/2022\/09\/postQueueImg_6-632751c1a67b2.jpg","contentUrl":"https:\/\/static.africa-press.net\/mali\/sites\/21\/2022\/09\/postQueueImg_6-632751c1a67b2.jpg","width":1520,"height":1138,"caption":"Pourquoi le cerveau humain est devenu si gros ?"},{"@type":"BreadcrumbList","@id":"https:\/\/www.africa-press.net\/mali\/homepage-french\/pourquoi-le-cerveau-humain-est-devenu-si-gros#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.africa-press.net\/mali\/"},{"@type":"ListItem","position":2,"name":"Pourquoi le cerveau humain est devenu si gros ?"}]},{"@type":"WebSite","@id":"https:\/\/www.africa-press.net\/mali\/#website","url":"https:\/\/www.africa-press.net\/mali\/","name":"Mali","description":"Just another Africa News Agency Sites site","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.africa-press.net\/mali\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"fr-FR"},{"@type":"Person","@id":"https:\/\/www.africa-press.net\/mali\/#\/schema\/person\/2b1cf3cd81a31e3cd26889ca66d677f1","name":"cfeditorfr"}]}},"_links":{"self":[{"href":"https:\/\/www.africa-press.net\/mali\/wp-json\/wp\/v2\/posts\/24805","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.africa-press.net\/mali\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.africa-press.net\/mali\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.africa-press.net\/mali\/wp-json\/wp\/v2\/users\/82"}],"replies":[{"embeddable":true,"href":"https:\/\/www.africa-press.net\/mali\/wp-json\/wp\/v2\/comments?post=24805"}],"version-history":[{"count":0,"href":"https:\/\/www.africa-press.net\/mali\/wp-json\/wp\/v2\/posts\/24805\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.africa-press.net\/mali\/wp-json\/wp\/v2\/media\/24804"}],"wp:attachment":[{"href":"https:\/\/www.africa-press.net\/mali\/wp-json\/wp\/v2\/media?parent=24805"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.africa-press.net\/mali\/wp-json\/wp\/v2\/categories?post=24805"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.africa-press.net\/mali\/wp-json\/wp\/v2\/tags?post=24805"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}