Srinivasan H
J Bone Joint Surg Am. 1979 Jun;61(4):557-61.
The patterns of isolated metacarpophalangeal-joint flexion and isolated interphalangeal-joint extension movements in eighty fingers with intact extrinsic and lumbrical muscles but no interossei (so-called interosseus-minus fingers) were studied. The pattern of metacarpophalangeal flexion resembled that seen in fingers with paralysis of all intrinsic muscles. From this it was inferred that in the interosseus-minus finger the lumbrical muscles are inactive during this movement. The pattern of isolated interphalangeal extension in the interosseus-minus fingers showed an improvement over that in totally intrinsic-minus fingers, suggesting that the lumbrical muscles reduce the extending forces at the metacarpophalangeal joint to some extent. Active participation of the interosseus muscles appears to be necessary for carrying out the movements of isolated metacarpophalangeal flexion and interphalangeal extension.
对80根手指进行了研究，这些手指的外在肌和蚓状肌完整，但没有骨间肌（所谓的无骨间肌手指），观察其单独的掌指关节屈曲和单独的指间关节伸展运动模式。掌指关节屈曲模式类似于所有内在肌麻痹的手指所观察到的模式。由此推断，在无骨间肌手指中，蚓状肌在该运动过程中不活动。无骨间肌手指单独的指间关节伸展模式比完全无内在肌手指的模式有所改善，这表明蚓状肌在一定程度上减少了掌指关节的伸展力。骨间肌的积极参与似乎是进行单独的掌指关节屈曲和指间关节伸展运动所必需的。
