复位
Repositio
定义
复位是对掌的反向运动，即拇指远离其他手指指尖的运动，例如松开对物体的握持。相反，拇指对掌是指将拇指掌面（或拇指指尖）与任意手指的远节掌面（或指尖）相对合的动作。
对掌与复位运动发生于第一腕掌关节，即大多角骨与第一掌骨之间的关节。
參考資料
Tonkin M. (2020). Thumb opposition: its definition and my approach to its measurement. Journal of Hand Surgery (European Volume). 45(3):315-317. doi:10.1177/1753193419889504
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 12th, 2023]
