Won Hyung-Sun, Oh Chang-Seok, Chung In-Hyuk
Department of Anatomy and Brain Korea 21 Project for Medical Sciences, Yonsei University College of Medicine, Seoul, Korea.
Anat Sci Int. 2010 Jun;85(2):115-7. doi: 10.1007/s12565-009-0040-3. Epub 2009 Apr 1.
We observed a variation of the median nerve that split into two divisions in the proximal forearm and conjoined into a single cord in the distal forearm before entering the carpal tunnel. The medial division was larger than the lateral division. An aberrant muscular slip from the flexor digitorum superficialis ran over the medial division of the split median nerve. The muscular slip over the medial division might have caused an entrapment syndrome of this nerve due to several muscular and cutaneous branches originating from the medial division. This variation of the median nerve has not been reported to our knowledge and may affect diagnosis and treatment of any neuropathy of the median nerve.
我们观察到正中神经的一种变异，该神经在前臂近端分成两支，在进入腕管之前于前臂远端合并为单一索条。内侧支比外侧支粗大。一条来自指浅屈肌的异常肌束越过正中神经分支的内侧支。内侧支上的肌束可能因源自内侧支的数条肌支和皮支而导致该神经的卡压综合征。据我们所知，这种正中神经变异尚未见报道，可能会影响正中神经任何神经病变的诊断和治疗。
