{"id":4797,"date":"2025-03-05T06:56:05","date_gmt":"2025-03-05T05:56:05","guid":{"rendered":"https:\/\/rvh-synergie.org\/actualites\/la-consommation-dalcool-entraine-un-vieillissement-cerebral-anterieur-et-une-flexibilite-comportementale-alteree-meme-au-debut-de-lage-adulte\/"},"modified":"2025-03-05T06:56:10","modified_gmt":"2025-03-05T05:56:10","slug":"la-consommation-dalcool-entraine-un-vieillissement-cerebral-anterieur-et-une-flexibilite-comportementale-alteree-meme-au-debut-de-lage-adulte","status":"publish","type":"post","link":"https:\/\/rvh-synergie.org\/actualites\/la-consommation-dalcool-entraine-un-vieillissement-cerebral-anterieur-et-une-flexibilite-comportementale-alteree-meme-au-debut-de-lage-adulte\/","title":{"rendered":"La consommation d&rsquo;alcool entra\u00eene un vieillissement c\u00e9r\u00e9bral ant\u00e9rieur et une flexibilit\u00e9 comportementale alt\u00e9r\u00e9e, m\u00eame au d\u00e9but de l&rsquo;\u00e2ge adulte"},"content":{"rendered":"<div>\n<div class=\"article-gallery lightGallery\">\n<div data-thumb=\"https:\/\/scx1.b-cdn.net\/csz\/news\/tmb\/2025\/alcohol-2.jpg\" data-src=\"https:\/\/scx2.b-cdn.net\/gfx\/news\/hires\/2025\/alcohol-2.jpg\" data-sub-html=\"Credit: Unsplash\/CC0 Public Domain\">\n<figure class=\"article-img\">\n<\/figure><\/div>\n<\/div>\n<p>La consommation d&rsquo;alcool entra\u00eene un vieillissement c\u00e9r\u00e9bral ant\u00e9rieur et une flexibilit\u00e9 comportementale alt\u00e9r\u00e9e, ces effets d\u00e9tectables m\u00eame chez les adultes dans les ann\u00e9es 20 et 30, selon une \u00e9tude innovante.<\/p>\n<p>La consommation dangereuse est connue pour \u00eatre li\u00e9e aux d\u00e9ficiences cognitives-comportementales, y compris la difficult\u00e9 \u00e0 s&rsquo;adapter aux circonstances changeantes. Cela aide \u00e0 expliquer, par exemple, pourquoi les personnes atteintes de troubles de la consommation d&rsquo;alcool (AUD) continuent de boire malgr\u00e9 des cons\u00e9quences n\u00e9gatives. Les preuves augmentent que la consommation d&rsquo;alcool lourde acc\u00e9l\u00e8re le vieillissement c\u00e9r\u00e9bral. On ne sait cependant pas si cet effet vieillissant explique le lien entre la consommation d&rsquo;alcool et certains d\u00e9ficits cognitifs typiques des cerveaux plus \u00e2g\u00e9s.<\/p>\n<p>Pour l&rsquo;\u00e9tude publi\u00e9e dans <i>Alcool: recherche clinique et exp\u00e9rimentale<\/i>les enqu\u00eateurs ont explor\u00e9 si la consommation dangereuse pr\u00e9disait le vieillissement c\u00e9r\u00e9bral mesur\u00e9 par un outil d&rsquo;apprentissage automatique et si le vieillissement c\u00e9r\u00e9bral a expliqu\u00e9 l&rsquo;association entre la consommation d&rsquo;alcool et l&rsquo;inflexibilit\u00e9 comportementale.<\/p>\n<p>Des chercheurs de l&rsquo;Universit\u00e9 de Caroline du Nord \u00e0 Chapel Hill ont travaill\u00e9 avec 58 personnes \u00e2g\u00e9es de 22 \u00e0 40 ans (35 femmes), dont beaucoup avaient commenc\u00e9 \u00e0 boire \u00e0 l&rsquo;adolescence. Les participants ont rempli des questionnaires sur leur consommation d&rsquo;alcool. Ils ont \u00e9galement subi une formation \u00e0 la t\u00e2che qui les obligeait \u00e0 ajuster leurs r\u00e9ponses \u00e0 mesure que la t\u00e2che a \u00e9volu\u00e9. Tous les participants avaient une IRM et un programme d&rsquo;apprentissage automatique a \u00e9t\u00e9 utilis\u00e9 pour \u00e9valuer les images c\u00e9r\u00e9brales structurelles 3D pour estimer leur \u00e2ge du cerveau.<\/p>\n<p>Les chercheurs ont calcul\u00e9 la diff\u00e9rence entre l&rsquo;\u00e2ge du cerveau estim\u00e9 et l&rsquo;\u00e2ge chronologique r\u00e9el (\u00ab\u00a0cerveau-pad\u00a0\u00bb). Ils ont utilis\u00e9 une analyse statistique pour explorer les associations entre la consommation d&rsquo;alcool, le cerveau-PAD et les erreurs pers\u00e9v\u00e9ratives sur le test de t\u00e2che et pour \u00e9valuer le r\u00f4le du vieillissement c\u00e9r\u00e9bral sur l&rsquo;inflexibilit\u00e9 comportementale li\u00e9e \u00e0 la consommation d&rsquo;alcool.<\/p>\n<p>Les participants ont principalement signal\u00e9 une consommation l\u00e9g\u00e8re \u00e0 mod\u00e9r\u00e9e d&rsquo;alcool et une consommation minimale d&rsquo;autres substances. Leurs r\u00e9sultats du vieillissement c\u00e9r\u00e9bral variaient de quelque peu retard\u00e9s \u00e0 consid\u00e9rablement acc\u00e9l\u00e9r\u00e9s, avec une certaine acc\u00e9l\u00e9ration en moyenne. Des scores de consommation d&rsquo;alcool plus \u00e9lev\u00e9s ont pr\u00e9dit un vieillissement c\u00e9r\u00e9bral plus acc\u00e9l\u00e9r\u00e9. Bien que les scores \u00e0 la consommation d&rsquo;alcool ne affectent pas directement les erreurs pers\u00e9v\u00e9ratoires du test d&rsquo;inflexibilit\u00e9 comportementale, l&rsquo;augmentation des scores de vieillissement c\u00e9r\u00e9bral acc\u00e9l\u00e9r\u00e9 l&rsquo;a fait.<\/p>\n<p>Les r\u00e9sultats ont montr\u00e9 que la consommation d&rsquo;alcool de plus en plus dangereuse pr\u00e9disait fortement un vieillissement c\u00e9r\u00e9bral plus acc\u00e9l\u00e9r\u00e9 et impliquait que ce m\u00e9canisme repr\u00e9sentait au moins une partie de la r\u00e9duction de la flexibilit\u00e9 comportementale. Il s&rsquo;agit de la premi\u00e8re \u00e9tude \u00e0 montrer des mesures apprentissage de l&rsquo;apprentissage automatique du vieillissement c\u00e9r\u00e9bral li\u00e9es \u00e0 une mesure bas\u00e9e sur la t\u00e2che de l&rsquo;inflexibilit\u00e9 comportementale, avec des preuves que le vieillissement c\u00e9r\u00e9bral peut \u00eatre un m\u00e9canisme causal entre la consommation d&rsquo;alcool et les d\u00e9ficits cognitifs.<\/p>\n<p>Les r\u00e9sultats sugg\u00e8rent que m\u00eame une petite quantit\u00e9 d&rsquo;alcool peut vieillir le cerveau, avec des effets d\u00e9tectables \u00e0 l&rsquo;\u00e2ge adulte pr\u00e9coce \u00e0 moyen, plus t\u00f4t que ce qui avait \u00e9t\u00e9 pr\u00e9sum\u00e9. Des recherches suppl\u00e9mentaires sont n\u00e9cessaires en utilisant des \u00e9chantillons plus importants et pour explorer les effets de la consommation pr\u00e9coce, de l&rsquo;\u00e9ducation et d&rsquo;autres facteurs qui influencent le d\u00e9clin cognitif.<\/p>\n<p>                                        <!-- print only --><\/p><\/div>\n","protected":false},"excerpt":{"rendered":"<p>La consommation d&rsquo;alcool entra\u00eene un vieillissement c\u00e9r\u00e9bral ant\u00e9rieur et une flexibilit\u00e9 comportementale alt\u00e9r\u00e9e, ces effets<\/p>\n","protected":false},"author":1,"featured_media":4798,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[35],"tags":[3191,4325,4323,879,4324,33,34,2369,1220,3203,2316,1872,47,2595],"class_list":["post-4797","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-les-addictions","tag-adulte","tag-alteree","tag-anterieur","tag-cerebral","tag-comportementale","tag-consommation","tag-dalcool","tag-debut","tag-entraine","tag-flexibilite","tag-lage","tag-meme","tag-une","tag-vieillissement","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>La consommation d&#039;alcool entra\u00eene un vieillissement c\u00e9r\u00e9bral ant\u00e9rieur et une flexibilit\u00e9 comportementale 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