Trivedi S, Satapathy B C, Rathore M, Sinha M B
Assistant Professor, Department of Anatomy, AIIMS , Raipur, Chhattisgarh, India .
Senior Resident, Department of Anatomy, AIIMS , Raipur, Chhattisgarh, India .
J Clin Diagn Res. 2016 Nov;10(11):AD03-AD04. doi: 10.7860/JCDR/2016/23358.8801. Epub 2016 Nov 1.
Human hand is involved in variety of precision work which requires a combined effort of forearm muscles as well as intrinsic muscles of hand. Lumbricals along with interossei muscles connect the tendons of flexor and extensor muscles and thus play a key role in the characteristic movements of human hands. Lumbricals originate from long flexor tendon and is inserted into dorsal digital expansion. Any variation in the attachment of these muscles can lead to deviation from the normal actions of the fingers and their proximal extension into carpal tunnel and might lead to carpal tunnel syndrome. An extremely rare case of first lumbrical taking origin solely from first tendon of Flexor Digitorum Superficialis (FDS) and having proximal attachment extending into carpal tunnel was noticed bilaterally in cadaveric dissection. These variations are always challenging for clinicians and surgeons during hand surgeries.
人类的手参与各种精细工作，这需要前臂肌肉以及手部固有肌肉的共同作用。蚓状肌与骨间肌连接屈肌和伸肌的肌腱，因此在人类手部的特征性运动中起关键作用。蚓状肌起源于长屈肌腱，止于指背腱膜。这些肌肉附着点的任何变异都可能导致手指正常动作的偏差，以及它们向近端延伸至腕管，进而可能导致腕管综合征。在尸体解剖中双侧发现了一个极其罕见的病例，即第一蚓状肌仅起源于指浅屈肌（FDS）的第一肌腱，且近端附着延伸至腕管。这些变异对手部手术中的临床医生和外科医生来说始终具有挑战性。
