{"id":7192,"date":"2026-06-01T13:04:06","date_gmt":"2026-06-01T10:04:06","guid":{"rendered":"https:\/\/wiki.voka.io\/glossary\/amnesie-retrograde\/"},"modified":"2026-06-25T12:13:56","modified_gmt":"2026-06-25T09:13:56","slug":"amnesie-retrograde","status":"publish","type":"glossary_item","link":"https:\/\/wiki.voka.io\/fr\/glossaire\/amnesie-retrograde\/","title":{"rendered":"Amn\u00e9sie r\u00e9trograde"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">L&rsquo;amn\u00e9sie r\u00e9trograde (du latin <em>retro<\/em> \u2014 en arri\u00e8re, <em>gradus<\/em> \u2014 pas, et du grec <em>amnesia<\/em> \u2014 oubli) est un trouble sp\u00e9cifique de la m\u00e9moire dans lequel une personne perd la capacit\u00e9 de se souvenir totalement ou partiellement des \u00e9v\u00e9nements qui se sont produits juste avant une l\u00e9sion c\u00e9r\u00e9brale traumatique.<\/p>\n\n<h2 class=\"wp-block-heading\" id=\"h-&#x44D;&#x442;&#x438;&#x43E;&#x43B;&#x43E;&#x433;&#x438;&#x44F;-&#x438;-&#x43F;&#x430;&#x442;&#x43E;&#x444;&#x438;&#x437;&#x438;&#x43E;&#x43B;&#x43E;&#x433;&#x438;&#x44F;\"><strong>\u00c9tiologie et physiopathologie<\/strong><\/h2>\n\n<p class=\"wp-block-paragraph\">La formation de tout souvenir est un processus \u00e9lectrochimique complexe. D&rsquo;abord, l&rsquo;information entre dans la m\u00e9moire \u00e0 court terme, puis les structures c\u00e9r\u00e9brales (principalement l&rsquo;hippocampe) la recodent et la stockent dans un d\u00e9p\u00f4t \u00e0 long terme. Le processus de transfert est appel\u00e9 consolidation de la m\u00e9moire et n\u00e9cessite un certain temps.<\/p>\n\n<p class=\"wp-block-paragraph\">Lors d&rsquo;un fort coup \u00e0 la t\u00eate, une impulsion bio\u00e9lectrique et m\u00e9tabolique puissante se propage \u00e0 travers le cerveau. En raison d&rsquo;une secousse c\u00e9r\u00e9brale soudaine, le processus de consolidation est imm\u00e9diatement et brutalement interrompu. Les \u00e9v\u00e9nements qui se sont produits quelques minutes ou heures avant la blessure n&rsquo;ont tout simplement pas le temps de passer par l&rsquo;\u00e9tape de consolidation. Contrairement aux anciens souvenirs profond\u00e9ment enracin\u00e9s qui restent intacts, l&rsquo;information r\u00e9cente est effac\u00e9e.<\/p>\n\n<h2 class=\"wp-block-heading\" id=\"h-&#x43A;&#x43B;&#x438;&#x43D;&#x438;&#x447;&#x435;&#x441;&#x43A;&#x43E;&#x435;-&#x437;&#x43D;&#x430;&#x447;&#x435;&#x43D;&#x438;&#x435;\"><strong>Importance clinique<\/strong><\/h2>\n\n<p class=\"wp-block-paragraph\">Ce type d&rsquo;amn\u00e9sie est le signe clinique principal et le plus fiable d&rsquo;une commotion c\u00e9r\u00e9brale. Le patient peut \u00eatre pleinement conscient, r\u00e9pondre correctement aux questions, mais ne pas se souvenir du moment de l&rsquo;impact ou des circonstances qui l&rsquo;ont pr\u00e9c\u00e9d\u00e9.<\/p>\n\n<p class=\"wp-block-paragraph\">La dur\u00e9e de l&rsquo;intervalle de temps effac\u00e9 de la m\u00e9moire (de quelques secondes \u00e0 plusieurs jours) est directement corr\u00e9l\u00e9e \u00e0 la gravit\u00e9 de la blessure. Il est important de comprendre que les souvenirs perdus du moment de la blessure ne reviennent g\u00e9n\u00e9ralement jamais. Les m\u00e9decins ne tentent pas de traiter l&rsquo;amn\u00e9sie elle-m\u00eame ; elle sert uniquement de marqueur diagnostique important pour \u00e9valuer l&rsquo;\u00e9tendue des dommages au syst\u00e8me nerveux.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>L&rsquo;amn\u00e9sie r\u00e9trograde (du latin <em>retro<\/em> \u2014 en arri\u00e8re, <em>gradus<\/em> \u2014 pas, et du grec <em>amnesia<\/em> \u2014 oubli) est un trouble sp\u00e9cifique de la m\u00e9moire dans lequel une personne perd la capacit\u00e9 de se souvenir totalement ou partiellement des \u00e9v\u00e9nements qui se sont produits juste avant une l\u00e9sion c\u00e9r\u00e9brale traumatique.<\/p>\n","protected":false},"featured_media":0,"template":"","class_list":["post-7192","glossary_item","type-glossary_item","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v25.0 (Yoast SEO v27.8) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ 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