Kumar J Prathap, K Padmalatha, B S Prakash, P M Radhika, B R Ramesh
Assistant Professor, Department of Anatomy, M. S. Ramaiah Medical College , Bangalore, Karnataka-560054, India .
J Clin Diagn Res. 2013 May;7(5):933-5. doi: 10.7860/JCDR/2013/5336.2971. Epub 2013 Mar 22.
The knowledge on the anatomical variations of the deep flexor muscles is important due to its evolutionary significance. The flexor digitorum profundus is the deep flexor muscle of the forearm. It is a composite muscle with a dual nerve supply. The medial half of muscle is supplied by the ulnar nerve, and lateral half of the muscle is supplied by the anterior interosseous nerve, a branch of the median nerve. It flexes the distal phalanges of the medial four digits. In the present case, we observed the presence of extensive cleavage of belly and tendon of flexor digitorum profundus to form flexor indicis profundus on the right side in an adult male cadaver. Flexor indicis profundus muscle is an example of progressive type of variation and it is usually asymptomatic, but it may cause compression of the anterior interosseous nerve, which can lead to compression neuropathy. If it is enlarged, it may simulate a ganglion.
由于其进化意义，了解屈指深肌的解剖变异知识很重要。指深屈肌是前臂的深层屈肌。它是一块具有双重神经支配的复合肌肉。肌肉的内侧半由尺神经支配，外侧半由正中神经的分支骨间前神经支配。它使内侧四个手指的远节指骨屈曲。在本病例中，我们在一名成年男性尸体的右侧观察到指深屈肌的肌腹和肌腱广泛分离，形成了示指深屈肌。示指深屈肌是渐进性变异的一个例子，通常无症状，但可能导致骨间前神经受压，进而导致压迫性神经病变。如果它增大，可能会类似腱鞘囊肿。
