脑血管走行分布及临床脉络膜前动脉Internal carotid artery,Anterior clinoid process superior part颈动脉管段海绵窦段交叉池段颈内动脉颈颈内内动动脉脉和和椎椎动动脉脉的的分分支支脉络膜前动脉脉络膜前动脉，14支，以3支最多？，为一组较细小而恒定的血管，在后交通动脉起始远侧2mm处由颈内动脉直接发出。该动脉在未穿入侧脑室下脚之前，除发13个皮质支外，还发出23个穿支，1支穿视神经内侧至大脑脚，另两支即为纹状体内囊动脉。此动脉主要营养尾状核尾，行程长，管径较小，易发生栓塞。Basal view of brain after transverse section of midbrain and partial excision of left temporal lobe to show magnified portions in Figure 2(rectangle A)and in Figure 4(rectangle B).The optic chiasm(1).The internal carotid artery(2).The
