{"id":6871,"date":"2026-05-04T16:12:15","date_gmt":"2026-05-04T13:12:15","guid":{"rendered":"https:\/\/wiki.voka.io\/glossary\/hemiparesie\/"},"modified":"2026-06-01T13:05:02","modified_gmt":"2026-06-01T10:05:02","slug":"hemiparesie","status":"publish","type":"glossary_item","link":"https:\/\/wiki.voka.io\/fr\/glossaire\/hemiparesie\/","title":{"rendered":"H\u00e9mipar\u00e9sie"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">L&rsquo;h\u00e9mipar\u00e9sie (du grec <em>hemi-<\/em> \u2014 moiti\u00e9 et <em>paresis<\/em> \u2014 affaiblissement, rel\u00e2chement) est un syndrome neurologique caract\u00e9ris\u00e9 par une perte partielle de la force musculaire et une restriction des mouvements volontaires dans le bras et la jambe d&rsquo;un c\u00f4t\u00e9 du corps.<\/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\">Les commandes motrices pour nos muscles naissent dans le cortex moteur de l&rsquo;enc\u00e9phale. \u00c0 partir de l\u00e0, les impulsions nerveuses descendent par un faisceau puissant de fibres (tractus cortico-spinal). La principale caract\u00e9ristique anatomique du syst\u00e8me est que, \u00e0 la jonction de l&rsquo;enc\u00e9phale et de la moelle spinale, la plupart de ces fibres croisent pour passer de l&rsquo;autre c\u00f4t\u00e9 du corps.<\/p>\n\n<p class=\"wp-block-paragraph\">En cas de contusion c\u00e9r\u00e9brale s\u00e9v\u00e8re ou de pression d&rsquo;un large h\u00e9matome, si le centre moteur du cerveau est endommag\u00e9 ou si les voies axonales dans l&rsquo;h\u00e9misph\u00e8re gauche sont comprim\u00e9es, une faiblesse musculaire (par\u00e9sie) se d\u00e9veloppera in\u00e9vitablement dans la main et la jambe droites. Une l\u00e9sion m\u00e9canique des neurones interrompt le signal \u00e9lectrique, et les muscles cessent de recevoir des commandes ad\u00e9quates pour la contraction.<\/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\">Dans le contexte d&rsquo;un traumatisme cr\u00e2nien, le d\u00e9veloppement de l&rsquo;h\u00e9mipar\u00e9sie est un sympt\u00f4me focal classique. Son apparition est un signal d&rsquo;alerte, indiquant une l\u00e9sion locale grave ou un effet de masse.<\/p>\n\n<p class=\"wp-block-paragraph\">Les neurologues \u00e9valuent la gravit\u00e9 de la faiblesse musculaire \u00e0 l&rsquo;aide d&rsquo;une \u00e9chelle sp\u00e9ciale de 5 points, o\u00f9 5 est la force normale, et 0 repr\u00e9sente une immobilit\u00e9 totale (cette condition est appel\u00e9e pl\u00e9gie ou paralysie). Identifier le c\u00f4t\u00e9 o\u00f9 la faiblesse s&rsquo;est d\u00e9velopp\u00e9e aide le m\u00e9decin d&rsquo;urgence \u00e0 supposer, avant m\u00eame l&rsquo;arriv\u00e9e \u00e0 l&rsquo;h\u00f4pital, dans quel h\u00e9misph\u00e8re se trouve l&rsquo;h\u00e9matome traumatique.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>L&rsquo;h\u00e9mipar\u00e9sie (du grec <em>hemi-<\/em> \u2014 moiti\u00e9 et <em>paresis<\/em> \u2014 affaiblissement, rel\u00e2chement) est un syndrome neurologique caract\u00e9ris\u00e9 par une perte partielle de la force musculaire et une restriction des mouvements volontaires dans le bras et la jambe d&rsquo;un c\u00f4t\u00e9 du corps.<\/p>\n","protected":false},"featured_media":0,"template":"","class_list":["post-6871","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 v26.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ 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