手背伸肌腱膜
Aponeurosis extensoria manus
定义
手伸肌扩张部(又称背侧指扩张部)是一个复杂的三角形腱膜结构,伸肌腱通过该结构止于指骨。该术语涵盖整个背侧纤维排列,从掌指(MCP)关节近端延伸,向远端展开覆盖近节和中节指骨。
该复合体的关键组成部分包括:
手伸肌扩张部的复杂结构具有两项主要功能:
这种独特的解剖排列使手指运动得以高度协调和精确控制:
- 指伸肌、蚓状肌和骨间肌协同作用,在近侧和远侧指间关节产生伸展运动,同时允许掌指关节的屈曲运动。
參考資料
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Gupta P, Lenchik L, Wuertzer SD, Pacholke DA. High-resolution 3-T MRI of the fingers: review of anatomy and common tendon and ligament injuries. AJR Am J Roentgenol. 2015 Mar;204(3):W314-23. doi: 10.2214/AJR.14.12776. PMID: 25714317.
Clavero JA, Alomar X, Monill JM, Esplugas M, Golanó P, Mendoza M, Salvador A. MR imaging of ligament and tendon injuries of the fingers. Radiographics. 2002 Mar-Apr;22(2):237-56. doi: 10.1148/radiographics.22.2.g02mr11237. PMID: 11896215.
anoso JJ, Naredo E, Martínez-Estupiñán L, Mérida-Velasco JR, Pascual-Ramos V, Murillo-González J. Palpation of the lateral bands of the extensor apparatus of the fingers. Anatomy of a neglected clinical finding. J Anat. 2021 Sep;239(3):663-668.