Ranney D A, Wells R P, Dowling J
J Hand Surg Am. 1987 Jul;12(4):566-75. doi: 10.1016/s0363-5023(87)80210-1.
Since conflicting statements have been made in the literature regarding the influence of lumbrical contraction on the metacarpophalangeal (MP) joint, a study was undertaken to determine the length-tension curve for the index flexor profundus. Four fresh cadaver hands were used. Measurements for the flexor superficialis and for the common extensor were determined in there. The measurements were correlated with measured displacement of these tendons in six finger positions. Isolated lumbrical contraction was then mechanically simulated, acting against spring homologues of the index extrinsic muscles. The finger moved from the rest position toward the intrinsic position with loads of less than 5 N. This demonstrated that in addition to its effect on interphalangeal joint extension, the lumbrical acting alone can cause flexion of the metacarpophalangeal joint.
由于文献中关于蚓状肌收缩对掌指（MP）关节的影响存在相互矛盾的说法，因此进行了一项研究以确定示指指深屈肌的长度-张力曲线。使用了四只新鲜的尸体手。在其中测定了指浅屈肌和指总伸肌的相关数据。这些测量值与这些肌腱在六个手指位置的测量位移相关。然后通过机械模拟孤立的蚓状肌收缩，使其对抗示指外在肌的弹簧类似物。手指在小于5 N的负荷下从静止位置向固有位置移动。这表明，除了其对指间关节伸展的影响外，单独作用的蚓状肌可导致掌指关节屈曲。
