1、精品腦動脈的供血范圍大腦前動脈：自頸內動脈發出后行向前內進入半球縱裂，并向頭側彎曲繞脫月氐體膝部和體后行，沿途發出眶額動脈、眶極動脈、基底節支，分布至額葉的下內面皮質、嗅球、透明隔、脫月氐體的前2/3、尾狀核的頭部、蒼白球、內囊前肢、額葉深部腦白質和大腦皮層的前2/3的區域。大腦前動脈最后分出肺緣和脫周兩大終末支，腫緣動脈沿扣帶溝后行分出額上、中、后內動脈。腫周動脈則沿肺月氐體和扣帶回之間后行，沿途發出旁中央動脈、頂上內（楔前）動脈和頂下內動脈后，繼續后行至脫月氐體壓部和大腦后動脈的壓部分支相吻合。大腦中動脈：為頸內動脈的終末支，發出的分支供血范圍變異大，供應額葉、頂葉、顆葉前部的絕大部分半球

2、突面皮層結構及深部腦白質，有時還發出分支分布到枕葉的外側面，其分支豆紋動脈穿經額葉的下面至基底節、尾狀核和內囊。大腦后動脈：自基底動脈發出后，繞腦干經環池后行，發出后丘腦穿通動脈和丘腦膝狀動脈分布至丘腦、膝狀體、內囊后肢和視束，并發出小分支至大腦腳，行至肺月氐體壓部發出分支和大腦前動脈的分支吻合，最后分出題葉前和后動脈、頂枕動脈及距狀動脈，供應顆葉的后下面、大腦半球內側面的后部和枕葉。脈絡膜前、后動脈：脈絡膜前動脈通常在后交通動脈起始處的上方起自頸內動脈，脈絡膜后動脈則起自大腦后動脈。它們分布于內囊的膝部和后肢、蒼白球內側區、視束、顆葉鉤回、杏仁核和側腦室脈絡膜從。小腦前下動脈：其行程和分布范

3、圍不恒定，供血范圍較小，與小腦后下動脈具有一定程度的互補。其分支供應小腦絨球、小腦半球的巖骨面、小腦中腳、腦橋和延髓的一部分。小腦后下動脈：由椎動脈發出，供血范圍通常包括小腦的后下面、小腦扁桃體、同側小腦下蚓部和延髓的外側面。腦動脈的供血區域（組圖）藍色：小腦后下動脈紫色：小腦前下動脈灰色：小腦上動脈淺藍：椎動脈分支墨綠：基底動脈分支天藍：脈絡膜前動脈橙色：大腦中動脈穿支暗紅：回返動脈紅色：大腦前動脈黃色：大腦中動脈綠色：大腦后動脈中I彳舄-j*CAI:ACAGSa“Ki*ca二nmc*1AIGA-.'.'-'3*ChAMLSA插圖w1福甯1llJ而討上配不域上爵中砌舞

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