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[颈内动脉]海绵窦部
Pars cavernosa
- 相关用语: 颈内动脉: [颈内动脉]海绵窦部
定义
颈内动脉的海绵窦段（即C4段）起自岩舌韧带，延伸至近端硬膜环，该硬膜环由前床突内侧及下方的骨膜构成。海绵窦段被海绵窦所包绕。
在此行程段中，动脉位于构成海绵窦的硬膜各层之间，但表面覆有窦的衬里膜。动脉起初向上走行，朝向后床突，继而沿蝶骨体侧方向前走行，再于前床突内侧向上弯曲，并穿过构成该窦顶部的硬膜。海绵窦段的弯曲部分称为颈动脉虹吸部。该段动脉周围有交感干的细小分支包绕，其外侧为展神经（第VI对脑神经）。
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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