{"id":69198,"date":"2025-11-14T08:45:38","date_gmt":"2025-11-14T08:45:38","guid":{"rendered":"https:\/\/psychologydictionary.ae\/anisotropie-fractionnaire\/"},"modified":"2025-11-14T08:45:38","modified_gmt":"2025-11-14T08:45:38","slug":"anisotropie-fractionnaire","status":"publish","type":"post","link":"https:\/\/psychologydictionary.ae\/fr\/anisotropie-fractionnaire\/","title":{"rendered":"Anisotropie fractionnaire"},"content":{"rendered":"<p>un indicateur quantitatif obtenu \u00e0 l\u2019aide d\u2019IRM par tenseur de diffusion (DTI), refl\u00e9tant le degr\u00e9 de d\u00e9pendance directionnelle de la diffusion de l\u2019eau dans le tissu. Les valeurs de l\u2019AF vont de 0 (diffusion enti\u00e8rement isotrope, identique dans toutes les directions) \u00e0 1 (diffusion enti\u00e8rement anisotrope, seulement dans une direction). Dans le cerveau, des valeurs \u00e9lev\u00e9es d\u2019AF sont caract\u00e9ristiques de la substance blanche, o\u00f9 l\u2019eau diffuse plus facilement le long des fibres axonales qu\u2019\u00e0 travers celles-ci. L\u2019AF est utilis\u00e9e pour \u00e9valuer l\u2019int\u00e9grit\u00e9 et la coh\u00e9sion de la substance blanche ; Une diminution de l\u2019indicateur est observ\u00e9e dans la scl\u00e9rose en plaques, les traumatismes cr\u00e2niens, les AVC et les maladies neurod\u00e9g\u00e9n\u00e9ratives.   <\/p>\n","protected":false},"excerpt":{"rendered":"<p>un indicateur quantitatif obtenu \u00e0 l\u2019aide d\u2019IRM par tenseur de diffusion (DTI), refl\u00e9tant le degr\u00e9 de d\u00e9pendance directionnelle de la diffusion de l\u2019eau dans le tissu. Les valeurs de l\u2019AF vont de 0 (diffusion enti\u00e8rement isotrope, identique dans toutes les directions) \u00e0 1 (diffusion enti\u00e8rement anisotrope, seulement dans une direction). Dans le cerveau, des valeurs [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0,"footnotes":""},"categories":[218],"tags":[],"class_list":["post-69198","post","type-post","status-publish","format-standard","hentry","category-concepts-psychologiques-cles-en-neuropsychologie-clinique"],"_links":{"self":[{"href":"https:\/\/psychologydictionary.ae\/fr\/wp-json\/wp\/v2\/posts\/69198","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/psychologydictionary.ae\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/psychologydictionary.ae\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/psychologydictionary.ae\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/psychologydictionary.ae\/fr\/wp-json\/wp\/v2\/comments?post=69198"}],"version-history":[{"count":0,"href":"https:\/\/psychologydictionary.ae\/fr\/wp-json\/wp\/v2\/posts\/69198\/revisions"}],"wp:attachment":[{"href":"https:\/\/psychologydictionary.ae\/fr\/wp-json\/wp\/v2\/media?parent=69198"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/psychologydictionary.ae\/fr\/wp-json\/wp\/v2\/categories?post=69198"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/psychologydictionary.ae\/fr\/wp-json\/wp\/v2\/tags?post=69198"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}