![[大脑前动脉]交通后部 - 脑 - 动脉 - e-Anatomy](https://cdn.imaios.cn/i/imaios-images/web/images/eanatomy/modules/cerveau-anatomie/images/v4/4fb22c9347b3bec793114afdd4d0ad77e762ff71c1db70d40170330f01d0f861?ar=640:670&auto=format,compress&bg=FFFFFF&fit=crop&p64=OTkwLDE2OA&t=W-Wkp-iEkeWJjeWKqOiEiV3kuqTpgJrlkI7pg6g&tf=Tm90byBTYW5zIFND&tx=990&ty=168&w=350&wk=1&s=8c4f9cd6cd359da5fad7bcb74ebaea9b)
[大脑前动脉]交通后部
Pars postcommunicalis; Segmentum A2
- 相关用语: 大脑前动脉: [大脑前动脉]交通后部
定义
大脑前动脉交通后段（A2段）从前交通动脉（AComm）延伸至形成胼周动脉和胼缘动脉的分叉处。Heubner回返动脉（远侧内侧纹状体动脉）供应内囊，通常起源于该段靠近AComm的起始部位。该段发出两条分支：
- 眶额动脉（内侧额底动脉）：起源于距AComm较短距离处
- 额极动脉（极额动脉）：起源于眶额动脉之后，靠近A2越过胼胝体的弯曲处。也可起源于胼缘动脉。
參考資料
This definition incorporates text from the wikipedia website - Wikipedia: The free encyclopedia. (2004, July 22). FL: Wikimedia Foundation, Inc. Retrieved August 10, 2004, from http://www.wikipedia.org
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