伸展
Extensio
定义
伸展是指发生在关节处的一种运动，导致两个身体部位或表面之间的角度增大。例如，膝关节处的伸展使小腿后表面与大腿腘绳肌区域分离，从而增大股骨（上方）与胫骨和腓骨（下方）之间的角度。
伸展的反向运动为屈曲，屈曲使两个身体部位或表面之间的角度减小。屈曲与伸展通常均发生在矢状面上。
參考資料
Drake, R.L., Vogl, A.W. and Mitchell, A.W.M. (2009). ‘Chapter 6: Lower Limb’ in Gray’s anatomy for Students. (2nd ed.) Philadelphia PA 19103-2899: Elsevier, pp. 513-516.
Jones, O. (2020). Anatomical terms of movement in ‘TeachMeAnatomy’. Available at URL: https://teachmeanatomy.info/the-basics/anatomical-terminology/terms-of-movement/ [accessed on Feb 11th, 2023]
