An Amazing Abnormality in the Course of the Musculocutaneous Nerve

Sinan Bakirci 1 * , Zülal Ekincioğlu Öner 2, Hilal Irmak Sapmaz 2, Nihat Ekinci 3
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1 Department of Anatomy, Faculty of Medicine, Düzce University, Düzce, Turkey
2 Department of Anatomy, Faculty of Medicine, İnönü University, Malatya, Turkey
3 Department of Anatomy, Faculty of Medicine, Karabük University, Karabük, Turkey
* Corresponding Author
EUR J BASIC MED SCI, Volume 3, Issue 4, pp. 96-99.
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The musculocutaneous nerve drive from the brachial plexus’s lateral cord and it is one of the terminal branches of this plexus. Commonly, it pierces the coracobrachialis muscle and then innervates the anterior department muscles of the arm. It also course at the lateral part of the the forearm while it terminates as the lateral antebrachial cutaneous nerve. The course and branching pattern variations of the musculocutaneous nerve are reported by several authors previously. We found a very rare variation during the dissection of a 60 years old male cadaver. In our case, the musculocutaneous nerve had a varied course which hasn’t been determined until now. It was terminating in the distal third of the arm as divided into two major branches. While the lateral branch continued as the lateral antebrachial cutaneous nerve, the medial branch, which was thicker than the lateral branch, descended downward in the medial side of the arm and passed into the cubital fossa. This medial branch was nearly close to the vessels. Eventually it was attaching to the median nerve at the forearm. The information about these variations are very important for clinicians and surgeons because of the relationships between the medial branch’s course and the important of anatomical structures in the forearm.


Bakirci S, Ekincioğlu Öner Z, Sapmaz HI, Ekinci N. An Amazing Abnormality in the Course of the Musculocutaneous Nerve. Eur J Basic Med Sci. 2013;3(4):96-9.


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