小脑镰
Falx cerebelli
定义
小脑镰是位于中线的硬膜垂直褶皱,位于小脑两半球之间。硬膜与蛛网膜共同包裹整个大脑,遮盖大脑半球表面的沟回与褶皱。然而,在某些区域,硬膜的内层(脑膜层)与外层骨膜层分离,向脑内延伸,形成褶皱或分隔,为不同脑区提供支撑。
小脑镰即为此类硬膜分隔之一,位于颅后窝内。其后缘附着于枕骨,上缘与小脑幕相连。小脑镰的前缘为游离缘,不与任何结构相连。
參考資料
Kekere, V. and Alsayouri, K. Anatomy, Head and Neck, Dura Mater. [Updated 2023 Jul 24]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2023 Jan-. Available from: https://www.ncbi.nlm.nih.gov/books/NBK545301/
Ghannam, J.Y. and Al Kharazi, K.A. Neuroanatomy, Cranial Meninges. [Updated 2023 Jul 24]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2023 Jan-. Available from: https://www.ncbi.nlm.nih.gov/books/NBK539882/
Snell, R.S. (2010). ‘Chapter 15: The meninges of the brain and the spinal cord’, in Clinical Neuroanatomy. (7th ed.) Philadelphia: Wolters Kluwer Health/Lippincott Williams & Wilkins, pp.427-444.