Valenzuela Michael, Launico Marjorie V., Varacallo Matthew A.
Philadelphia College of Osteopathic Medicine-Georgia Campus
De La Salle Medical and Health Sciences Institute
The lumbrical muscles comprise a set of 4 intrinsic hand muscles attached to the flexor digitorum profundus (FDP) tendons proximally and the digits' extensor expansions distally (see . Right Hand Lumbricals, Anterior View). These muscles are cylindrical and wormlike, resembling earthworms belonging to the genus . All 4 lumbricals flex the metacarpophalangeal (MCP) joints and extend the proximal interphalangeal (PIP) and distal interphalangeal (DIP) joints. By coordinating with other hand muscles, the lumbricals help control the fine and delicate movements of the fingers. The actions of these muscles are essential for gripping objects, typing, and performing various dexterous hand movements. This is a review of the anatomy and clinical importance of the lumbricals.
蚓状肌由4块手部固有肌组成，近端附着于指深屈肌腱，远端附着于各手指的伸肌扩张部（见图。右手蚓状肌，前视图）。这些肌肉呈圆柱形且像蠕虫，类似于 属的蚯蚓。所有4块蚓状肌均可屈曲掌指关节，并伸展近端指间关节和远端指间关节。通过与手部其他肌肉协同作用，蚓状肌有助于控制手指精细灵巧的动作。这些肌肉的作用对于抓握物体、打字以及进行各种灵活的手部动作至关重要。本文是对蚓状肌的解剖结构及其临床重要性的综述。
