Malhotra Arjun, Kulesza Randy
Department of Anatomy, Lake Erie College of Osteopathic Medicine, Erie, PA, USA.
Anat Cell Biol. 2022 Sep 30;55(3):390-393. doi: 10.5115/acb.22.014. Epub 2022 Jun 30.
Variations of the musculature within the upper extremity have been widely documented, with clinical implications ranging from motor dysfunction to compressive neuropathies. Herein, we described an aberrant muscle that originated from the anterior proximal forearm, formed a tendon that coursed through the carpal tunnel, and converged with the flexor digitorum profundus muscle to contribute to the first lumbrical. Additionally, the second lumbrical consisted of two heads, originating from the index and middle finger tendons of flexor digitorum profundus. Documentation and recognition of such anatomic variants is important, as this anatomic pattern may contribute to anterior interosseous or median nerve compression, incoordination, complications during surgery, and other clinical manifestations.
上肢肌肉组织的变异已被广泛记录，其临床影响范围从运动功能障碍到压迫性神经病变。在此，我们描述了一块异常肌肉，它起自前臂近端前方，形成一条穿过腕管的肌腱，并与指深屈肌会合，参与构成第一蚓状肌。此外，第二蚓状肌由两个头组成，分别起自指深屈肌的示指和中指肌腱。记录和识别这种解剖变异很重要，因为这种解剖模式可能导致骨间前神经或正中神经受压、不协调、手术并发症及其他临床表现。
