{"id":8155,"date":"2025-07-24T03:56:08","date_gmt":"2025-07-24T01:56:08","guid":{"rendered":"https:\/\/rvh-synergie.org\/actualites\/minuscule-circuit-cerebral-lie-a-linconfort-de-retrait-de-la-cocaine-et-au-risque-de-rechute\/"},"modified":"2025-07-24T03:56:11","modified_gmt":"2025-07-24T01:56:11","slug":"minuscule-circuit-cerebral-lie-a-linconfort-de-retrait-de-la-cocaine-et-au-risque-de-rechute","status":"publish","type":"post","link":"https:\/\/rvh-synergie.org\/actualites\/minuscule-circuit-cerebral-lie-a-linconfort-de-retrait-de-la-cocaine-et-au-risque-de-rechute\/","title":{"rendered":"Minuscule circuit c\u00e9r\u00e9bral li\u00e9 \u00e0 l&rsquo;inconfort de retrait de la coca\u00efne et au risque de rechute"},"content":{"rendered":"<div>\n<div class=\"article-gallery lightGallery\">\n<div data-thumb=\"https:\/\/scx1.b-cdn.net\/csz\/news\/tmb\/2019\/8-brain.jpg\" data-src=\"https:\/\/scx2.b-cdn.net\/gfx\/news\/hires\/2019\/8-brain.jpg\" data-sub-html=\"Credit: CC0 Public Domain\">\n<figure class=\"article-img\">\n<\/figure><\/div>\n<\/div>\n<p>Pourquoi tant de gens rechutent-ils apr\u00e8s avoir quitt\u00e9 de la coca\u00efne? Une nouvelle \u00e9tude de l&rsquo;Universit\u00e9 h\u00e9bra\u00efque r\u00e9v\u00e8le qu&rsquo;un circuit c\u00e9r\u00e9bral \u00ab\u00a0anti-r\u00e9compense\u00a0\u00bb sp\u00e9cifique devient hyperactif pendant le retrait &#8211; conduisant l&rsquo;inconfort et repoussant les utilisateurs vers le m\u00e9dicament. \u00c9tonnamment, ce circuit peut \u00e9galement servir de m\u00e9canisme de protection int\u00e9gr\u00e9, offrant un nouvel espoir pour le traitement de la toxicomanie.<\/p>\n<p>La d\u00e9pendance \u00e0 la coca\u00efne a longtemps \u00e9t\u00e9 comprise comme un bras de fer entre la r\u00e9compense et la retenue. La ru\u00e9e de la dopamine maintient les utilisateurs accroch\u00e9s, tandis que le retrait d\u00e9clenche l&rsquo;anxi\u00e9t\u00e9, la d\u00e9pression et le d\u00e9sespoir. Mais une nouvelle \u00e9tude des chercheurs de l&rsquo;Universit\u00e9 h\u00e9bra\u00efque de J\u00e9rusalem r\u00e9v\u00e8le que ce n&rsquo;est pas seulement l&rsquo;envie de plaisir &#8211; mais l&rsquo;aversion du cerveau \u00e0 la douleur &#8211; qui joue un r\u00f4le puissant dans la rechute.<\/p>\n<p>Dirig\u00e9 par le professeur Yonatan M. Kupchik et le doctorat. \u00c9tudiant Liran Levi de la Facult\u00e9 de m\u00e9decine, l&rsquo;\u00e9tude, apparaissant dans <i>Avanc\u00e9es scientifiques<\/i>identifie un r\u00e9seau sp\u00e9cifique \u00ab\u00a0anti-r\u00e9compense\u00a0\u00bb au plus profond du cerveau qui subit des changements durables lors de la consommation, du retrait et de la r\u00e9exposition \u00e0 la coca\u00efne. Ce r\u00e9seau glutamatergique, situ\u00e9 dans le Ventral Pallidum, \u00e9merge comme un acteur cl\u00e9 de la d\u00e9pendance &#8211; et une cible prometteuse pour les th\u00e9rapies futures.<\/p>\n<h2>Les montagnes russes \u00e0 l&rsquo;int\u00e9rieur du cerveau<\/h2>\n<p>Bien que le pallidum ventral soit connu pour r\u00e9guler le plaisir et la r\u00e9compense, cette recherche met en \u00e9vidence un groupe moins connu de neurones qui suppriment la lib\u00e9ration de la dopamine et amplifient les \u00e9motions n\u00e9gatives. Pendant l&rsquo;abstinence, ce r\u00e9seau anti-r\u00e9compense acc\u00e9l\u00e8re son activit\u00e9 &#8211; infaignant l&rsquo;inconfort et la d\u00e9tresse \u00e9motionnelle. Lorsque la coca\u00efne est r\u00e9introduite, le r\u00e9seau est rapidement calme, renfor\u00e7ant le cycle de recherche et de rechute de secours.<\/p>\n<p>\u00ab\u00a0C&rsquo;est un interrupteur\u00a0\u00bb, explique le professeur Kupchik. \u00ab\u00a0Ce r\u00e9seau suit le co\u00fbt \u00e9motionnel de l&rsquo;abstinence. Lorsqu&rsquo;il est tr\u00e8s actif, il peut inciter quelqu&rsquo;un \u00e0 rechercher \u00e0 nouveau le m\u00e9dicament &#8211; juste pour \u00e9chapper aux sentiments n\u00e9gatifs.\u00a0\u00bb<\/p>\n<p>L&rsquo;\u00e9tude montre \u00e9galement que ce circuit c\u00e9r\u00e9bral se connecte avec d&rsquo;autres centres cl\u00e9s impliqu\u00e9s dans la r\u00e9gulation \u00e9motionnelle et le traitement des r\u00e9compenses. Pendant le retrait, ces connexions deviennent plus fortes, augmentant la sensibilit\u00e9 aux \u00e9tats \u00e9motionnels n\u00e9gatifs. Lorsque le m\u00e9dicament revient, le syst\u00e8me r\u00e9initialise &#8211; att\u00e9nuer la d\u00e9tresse temporaire.<\/p>\n<h2>\u00c9tonnamment, l&rsquo;inconfort peut servir un but<\/h2>\n<p>Dans une d\u00e9couverte frappante, les chercheurs ont d\u00e9couvert que lorsque ce circuit anti-r\u00e9compense a \u00e9t\u00e9 inhib\u00e9, la pr\u00e9f\u00e9rence des m\u00e9dicaments et la motivation ont r\u00e9ellement augment\u00e9. Cela sugg\u00e8re que les signaux n\u00e9gatifs du cerveau peuvent jouer un r\u00f4le protecteur &#8211; cr\u00e9ant un frein interne qui d\u00e9courage la consommation de drogues excessive en la rendant \u00e9motionnellement co\u00fbteuse.<\/p>\n<h2>Un changement dans le paradigme du traitement de la toxicomanie<\/h2>\n<p>Alors que la plupart des th\u00e9rapies de d\u00e9pendance actuelles visent \u00e0 att\u00e9nuer le syst\u00e8me de r\u00e9compense du cerveau, cette \u00e9tude pointe vers un chemin diff\u00e9rent: cibler la douleur \u00e9motionnelle du sevrage. En comprenant et en modulant potentiellement les signaux aversifs du cerveau, les traitements futurs pourraient mieux r\u00e9pondre aux causes profondes de la rechute.<\/p>\n<p>Publi\u00e9 par Ph.D. L&rsquo;\u00e9tudiant Liran A. Levi et le professeur Kupchik au IMric Center for Addiction Research (ICARE) de l&rsquo;Universit\u00e9 Hebrew, l&rsquo;\u00e9tude propose un nouveau cadre pour comprendre la d\u00e9pendance &#8211; pas tout comme la poursuite du plaisir, mais comme l&rsquo;\u00e9vasion de la douleur.<\/p>\n<p>                                        <!-- print only --><\/p><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Pourquoi tant de gens rechutent-ils apr\u00e8s avoir quitt\u00e9 de la coca\u00efne? Une nouvelle \u00e9tude de<\/p>\n","protected":false},"author":1,"featured_media":8156,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[35],"tags":[879,4235,1010,954,6086,6085,4822,1812,40],"class_list":["post-8155","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-les-addictions","tag-cerebral","tag-circuit","tag-cocaine","tag-lie","tag-linconfort","tag-minuscule","tag-rechute","tag-retrait","tag-risque","generate-columns","tablet-grid-50","mobile-grid-100","grid-parent","grid-50","resize-featured-image"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Minuscule circuit c\u00e9r\u00e9bral li\u00e9 \u00e0 l&#039;inconfort de retrait de la coca\u00efne et au risque de rechute - RVH-Synergie.org<\/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:\/\/rvh-synergie.org\/actualites\/minuscule-circuit-cerebral-lie-a-linconfort-de-retrait-de-la-cocaine-et-au-risque-de-rechute\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Minuscule circuit c\u00e9r\u00e9bral li\u00e9 \u00e0 l&#039;inconfort de retrait de la coca\u00efne et au risque de rechute - RVH-Synergie.org\" \/>\n<meta property=\"og:description\" content=\"Pourquoi tant de gens rechutent-ils apr\u00e8s avoir quitt\u00e9 de la coca\u00efne? 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