Barmakian J T
Jersey Shore Medical Center, Neptune, New Jersey.
Hand Clin. 1992 Nov;8(4):683-91.
The three joints of the thumb differ markedly with respect to anatomy and function. Each contributes its own anatomic personality, and when functioning together, they allow the thumb to move with remarkable versatility and grace yet with the stability necessary to perform a wide variety of tasks. The carpometacarpal and interphalangeal joints allow for thumb mobility while the metacarpophalangeal joint provides stability. Thumb rotation primarily takes place at the CMC joint, although the MP and IP joints each contribute a small amount of pronation with flexion. Although much is known about the static structural anatomy of the thumb, its dynamic anatomy requires further investigation. The fluid, elegant and powerful movements of the thumb are complex, and defining the contributions of the various individual structures is difficult. Hopefully, future investigators using newer techniques will unravel the complexities of the functional anatomy of this remarkable digit.
拇指的三个关节在解剖结构和功能方面存在显著差异。每个关节都有其独特的解剖学特征，当它们协同工作时，能使拇指以非凡的灵活性和优雅姿态移动，同时具备执行各种任务所需的稳定性。腕掌关节和指间关节使拇指具有活动能力，而掌指关节则提供稳定性。拇指的旋转主要发生在腕掌关节，不过掌指关节和指间关节在屈曲时也各自有少量旋前动作。尽管人们对拇指的静态结构解剖学已有很多了解，但其动态解剖学仍需进一步研究。拇指流畅、优雅且有力的动作十分复杂，确定各个结构的作用很困难。希望未来使用更新技术的研究者能解开这个非凡手指功能解剖学的复杂性。
