{"id":1229,"date":"2022-04-08T17:48:07","date_gmt":"2022-04-08T15:48:07","guid":{"rendered":"https:\/\/www.larskophal.ch\/press\/?p=1229"},"modified":"2023-06-22T21:02:32","modified_gmt":"2023-06-22T19:02:32","slug":"cryogenisation-demain-copier-coller-le-contenu-de-son-cerveau","status":"publish","type":"post","link":"https:\/\/www.larskophal.ch\/press\/2022\/04\/cryogenisation-demain-copier-coller-le-contenu-de-son-cerveau\/","title":{"rendered":"Cryog\u00e9nisation: demain, copier-coller le contenu de son cerveau?"},"content":{"rendered":"\n<p>La cryog\u00e9nisation ou cryonie (du grec kryos, &#8216;froid&#8217;) est la cong\u00e9lation du corps \u00e0 extr\u00eamement basse temp\u00e9rature (g\u00e9n\u00e9ralement \u00e0 -196 \u00b0C), imm\u00e9diatement apr\u00e8s le d\u00e9c\u00e8s, dans l\u2019espoir de pouvoir un jour ramener le \u00ab&nbsp;patient&nbsp;\u00bb a la vie. Certains choisissent de ne faire cryoconserver que leur t\u00eate, ou uniquement leur cerveau (neuroconservation) plut\u00f4t que leur corps entier.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Ce qu\u2019ils croient<\/h3>\n\n\n\n<p>Les cryoniciens soutiennent que tant que la structure c\u00e9r\u00e9brale reste intacte, il n&#8217;y a pas d&#8217;obstacle fondamental \u00e0 la r\u00e9cup\u00e9ration de son contenu informationnel, m\u00eame si on ne sait pas encore le faire. Un cerveau cryog\u00e9nis\u00e9 est comme un ordinateur \u00e9teint, qu\u2019une technologie encore inexistante permettra un jour de d\u00e9congeler et red\u00e9marrer, avec sa m\u00e9moire intacte.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Qui sont-ils&nbsp;?<\/h3>\n\n\n\n<p>Le premier cadavre \u00e0 \u00eatre congel\u00e9 fut celui du Dr James Bedford, en 1967. Aujourd\u2019hui pr\u00e8s de 300 corps, t\u00eates ou cerveaux sont cryoconserv\u00e9s et pr\u00e8s de 3000 personnes ont pris des dispositions pour la cryoconservation de tout ou partie de leur d\u00e9pouille par l\u2019une des deux principales entreprises de cryog\u00e9nisation que sont <a href=\"https:\/\/www.alcor.org\" target=\"_blank\" rel=\"noreferrer noopener\">Alcor<\/a>, en Arizona, et le <a href=\"https:\/\/cryonics.org\" target=\"_blank\" rel=\"noreferrer noopener\">Cryonics Institute<\/a>, dans le Michigan. La soci\u00e9t\u00e9 russe <a href=\"https:\/\/kriorus.ru\/en\" target=\"_blank\" rel=\"noreferrer noopener\">KrioRus<\/a> est l&#8217;une des deux installations en dehors des \u00c9tats-Unis \u00e0 proposer \u00e9galement ce service, avec le laboratoire europ\u00e9en d&#8217;Alcor au Portugal.<\/p>\n\n\n\n<p>La cryog\u00e9nisation n\u2019est pas donn\u00e9e\u00a0: la proc\u00e9dure de pr\u00e9paration et le stockage aux \u00c9tats-Unis co\u00fbtent l\u2019\u00e9quivalent de 25\u2019000 \u00e0 180\u2019000 euros. KrioRus, qui conserve les corps en commun dans de grands cryostats, demande entre 20\u2019000 et 32\u2019000 euros.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Ce qu\u2019ils font<\/h3>\n\n\n\n<p>L\u00e9galement, le processus ne peut commencer qu&#8217;apr\u00e8s que le patient ait \u00e9t\u00e9 d\u00e9clar\u00e9 l\u00e9galement mort&nbsp;; id\u00e9alement, dans les deux minutes suivant l&#8217;arr\u00eat du c\u0153ur et pas au-del\u00e0 de 15 minutes. Le corps est emball\u00e9 dans de la glace et intub\u00e9 avec des produits chimiques qui freinent la coagulation du sang. Une fois dans l&#8217;installation cryonique, il est refroidi juste au-dessus de 0\u00b0C et son sang est remplac\u00e9 par une solution devant pr\u00e9server les organes. Vient ensuite un antigel pour emp\u00eacher la formation de cristaux de glace dans les organes et les tissus, puis le corps est refroidi \u00e0 -130\u00b0C. L&#8217;\u00e9tape finale consiste \u00e0 placer le corps dans un r\u00e9cipient qui est descendu dans un r\u00e9servoir d&#8217;azote liquide \u00e0 -196\u00b0C.<\/p>\n\n\n\n<p>La technologie permettra-t\u2019elle un jour de ramener ces corps \u00e0 la vie&nbsp;? Probablement pas. Leur renaissance n\u00e9cessiterait de r\u00e9parer les dommages caus\u00e9s par le manque d&#8217;oxyg\u00e8ne, la toxicit\u00e9 des substances inject\u00e9es, le gel des tissus qui ne se seraient pas parfaitement vitrifi\u00e9s, et finalement de r\u00e9soudre la cause premi\u00e8re du d\u00e9c\u00e8s. Les cryog\u00e9niciens font le pari que les nanotechnologies permettront un jour de r\u00e9g\u00e9n\u00e9rer les tissus endommag\u00e9s, y compris les r\u00e9seaux neuronaux du cerveau&#8230; Encore faudrait-il bien s\u00fbr que les entreprises cryoniques poursuivent leurs activit\u00e9s suffisamment longtemps&nbsp;: les premi\u00e8res tentatives de conservation, dans les ann\u00e9es 1960 et 1970, se sont toutes sold\u00e9es par un \u00e9chec, les soci\u00e9t\u00e9s faisant faillite et les cadavres stock\u00e9s devant \u00eatre d\u00e9congel\u00e9s et \u00e9limin\u00e9s.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Pourquoi c\u2019est int\u00e9ressant<\/h3>\n\n\n\n<p>Une approche diff\u00e9rente est celle d\u00e9velopp\u00e9e par <a href=\"https:\/\/nectome.com\" target=\"_blank\" rel=\"noreferrer noopener\">Nectome<\/a>, une startup californienne qui pr\u00e9voit de pr\u00e9server votre cerveau afin de\u2026 t\u00e9l\u00e9charger son contenu.<\/p>\n\n\n\n<p>La solution d\u00e9velopp\u00e9e par Nectome permet de garder intact la structure d\u2019un cerveau, au niveau du nanom\u00e8tre, y compris son connectome, c\u2019est a dire le r\u00e9seau de synapses qui relient les neurones, et ce ind\u00e9finiment, comme une statue de verre gel\u00e9. Mais il n&#8217;y a aucune attente ici que le tissu pr\u00e9serv\u00e9 puisse \u00eatre r\u00e9ellement ramen\u00e9 \u00e0 la vie, comme l\u2019esp\u00e8re la cryog\u00e9nisation \u00ab\u00a0classique\u00a0\u00bb\u00a0: au lieu de cela, l&#8217;id\u00e9e est de r\u00e9cup\u00e9rer les informations pr\u00e9sentes dans la structure du cerveau, gr\u00e2ce \u00e0 une hypoth\u00e9tique technologie future qui permettra de scanner chacune de ses mol\u00e9cules, puis de t\u00e9l\u00e9charger tout son contenu &#8211; ses souvenirs, ses comp\u00e9tences, sa personnalit\u00e9 &#8211; sur un ordinateur. La machine simulerait exactement les processus du cerveau d\u2019origine, acc\u00e9dant ainsi \u00e0 la conscience sensible, et conf\u00e9rant \u00e0 son ancien propri\u00e9taire biologique une forme d\u2019immortalit\u00e9\u2026 tant que personne ne retire la prise, bien s\u00fbr.<\/p>\n\n\n\n<p>Cette approche, connue sous le nom d&#8217;\u00e9mulation du cerveau entier, suppose \u00e9videmment que toutes les subtilit\u00e9s d&#8217;un esprit, d\u2019une personnalit\u00e9 et d&#8217;une m\u00e9moire humaine sont contenues dans la structure de ses synapses.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/www.larskophal.ch\/press\/wp-content\/uploads\/2022\/04\/N39_LCB_WEB_2_cryo-2.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"725\" height=\"1024\" src=\"https:\/\/www.larskophal.ch\/press\/wp-content\/uploads\/2022\/04\/N39_LCB_WEB_2_cryo-2-725x1024.jpg\" alt=\"\" class=\"wp-image-1231\" srcset=\"https:\/\/www.larskophal.ch\/press\/wp-content\/uploads\/2022\/04\/N39_LCB_WEB_2_cryo-2-725x1024.jpg 725w, https:\/\/www.larskophal.ch\/press\/wp-content\/uploads\/2022\/04\/N39_LCB_WEB_2_cryo-2-212x300.jpg 212w, https:\/\/www.larskophal.ch\/press\/wp-content\/uploads\/2022\/04\/N39_LCB_WEB_2_cryo-2-768x1085.jpg 768w, https:\/\/www.larskophal.ch\/press\/wp-content\/uploads\/2022\/04\/N39_LCB_WEB_2_cryo-2-1087x1536.jpg 1087w, https:\/\/www.larskophal.ch\/press\/wp-content\/uploads\/2022\/04\/N39_LCB_WEB_2_cryo-2-1450x2048.jpg 1450w, https:\/\/www.larskophal.ch\/press\/wp-content\/uploads\/2022\/04\/N39_LCB_WEB_2_cryo-2-800x1130.jpg 800w, https:\/\/www.larskophal.ch\/press\/wp-content\/uploads\/2022\/04\/N39_LCB_WEB_2_cryo-2.jpg 1656w\" sizes=\"auto, (max-width: 725px) 100vw, 725px\" \/><\/a><\/figure>\n\n\n\n<p>Le Chou Brave 39, &#8220;Mort ou Vif&#8221;, mars 2022<\/p>\n","protected":false},"excerpt":{"rendered":"<p>La cryog\u00e9nisation ou cryonie (du grec kryos, &#8216;froid&#8217;) est la cong\u00e9lation du corps \u00e0 extr\u00eamement basse temp\u00e9rature (g\u00e9n\u00e9ralement \u00e0 -196 \u00b0C), imm\u00e9diatement apr\u00e8s le d\u00e9c\u00e8s, dans l\u2019espoir de pouvoir un jour ramener le \u00ab&nbsp;patient&nbsp;\u00bb a la vie. Certains choisissent de ne faire cryoconserver que leur t\u00eate, ou uniquement leur cerveau (neuroconservation) plut\u00f4t que leur corps &hellip;<\/p>\n","protected":false},"author":1,"featured_media":1230,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"image","meta":{"content-type":"","ngg_post_thumbnail":0,"footnotes":""},"categories":[67,127,157,123],"tags":[161,163,105,40,162],"class_list":["post-1229","post","type-post","status-publish","format-image","has-post-thumbnail","hentry","category-journalisme","category-sante","category-societe","category-technologies","tag-cryogenisation","tag-immortalite","tag-le-chou-brave","tag-societe","tag-technologies","post_format-post-format-image"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Cryog\u00e9nisation: demain, copier-coller le contenu de son cerveau? - Lars Kophal<\/title>\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.larskophal.ch\/press\/2022\/04\/cryogenisation-demain-copier-coller-le-contenu-de-son-cerveau\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Cryog\u00e9nisation: demain, copier-coller le contenu de son cerveau? - Lars Kophal\" \/>\n<meta property=\"og:description\" content=\"La cryog\u00e9nisation ou cryonie (du grec kryos, &#8216;froid&#8217;) est la cong\u00e9lation du corps \u00e0 extr\u00eamement basse temp\u00e9rature (g\u00e9n\u00e9ralement \u00e0 -196 \u00b0C), imm\u00e9diatement apr\u00e8s le d\u00e9c\u00e8s, dans l\u2019espoir de pouvoir un jour ramener le \u00ab&nbsp;patient&nbsp;\u00bb a la vie. Certains choisissent de ne faire cryoconserver que leur t\u00eate, ou uniquement leur cerveau (neuroconservation) plut\u00f4t que leur corps &hellip;\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.larskophal.ch\/press\/2022\/04\/cryogenisation-demain-copier-coller-le-contenu-de-son-cerveau\/\" \/>\n<meta property=\"og:site_name\" content=\"Lars Kophal\" \/>\n<meta property=\"article:published_time\" content=\"2022-04-08T15:48:07+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-06-22T19:02:32+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.larskophal.ch\/press\/wp-content\/uploads\/2022\/04\/N39_LCB_WEB_2_cryo-1.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1656\" \/>\n\t<meta property=\"og:image:height\" content=\"2339\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Lars Kophal\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"Lars Kophal\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.larskophal.ch\/press\/2022\/04\/cryogenisation-demain-copier-coller-le-contenu-de-son-cerveau\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.larskophal.ch\/press\/2022\/04\/cryogenisation-demain-copier-coller-le-contenu-de-son-cerveau\/\"},\"author\":{\"name\":\"Lars Kophal\",\"@id\":\"https:\/\/www.larskophal.ch\/press\/#\/schema\/person\/e39cd1f07abd3115c360cc70d526b144\"},\"headline\":\"Cryog\u00e9nisation: demain, copier-coller le contenu de son cerveau?\",\"datePublished\":\"2022-04-08T15:48:07+00:00\",\"dateModified\":\"2023-06-22T19:02:32+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.larskophal.ch\/press\/2022\/04\/cryogenisation-demain-copier-coller-le-contenu-de-son-cerveau\/\"},\"wordCount\":808,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/www.larskophal.ch\/press\/#\/schema\/person\/e39cd1f07abd3115c360cc70d526b144\"},\"image\":{\"@id\":\"https:\/\/www.larskophal.ch\/press\/2022\/04\/cryogenisation-demain-copier-coller-le-contenu-de-son-cerveau\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.larskophal.ch\/press\/wp-content\/uploads\/2022\/04\/N39_LCB_WEB_2_cryo-1.jpg\",\"keywords\":[\"Cryog\u00e9nisation\",\"Immortalit\u00e9\",\"Le Chou Brave\",\"Soci\u00e9t\u00e9\",\"Technologies\"],\"articleSection\":[\"Journalisme\",\"Sant\u00e9\",\"Soci\u00e9t\u00e9\",\"Technologies\"],\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.larskophal.ch\/press\/2022\/04\/cryogenisation-demain-copier-coller-le-contenu-de-son-cerveau\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.larskophal.ch\/press\/2022\/04\/cryogenisation-demain-copier-coller-le-contenu-de-son-cerveau\/\",\"url\":\"https:\/\/www.larskophal.ch\/press\/2022\/04\/cryogenisation-demain-copier-coller-le-contenu-de-son-cerveau\/\",\"name\":\"Cryog\u00e9nisation: demain, copier-coller le contenu de son cerveau? 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