Compendium of Anatomical Variants
Unusual formation of the median nerve associated with the third head of biceps brachii
Article first published online: 23 JAN 2012
Copyright © 2012 Wiley Periodicals, Inc.
Volume 25, Issue 8, pages 961–962, November 2012
How to Cite
Ongeti, K., Pulei, A., Ogeng'o, J. and Saidi, H. (2012), Unusual formation of the median nerve associated with the third head of biceps brachii. Clin. Anat., 25: 961–962. doi: 10.1002/ca.22028
- Issue published online: 30 OCT 2012
- Article first published online: 23 JAN 2012
- Manuscript Accepted: 8 DEC 2011
- Manuscript Revised: 7 DEC 2011
- Manuscript Received: 10 AUG 2011
- median nerve;
- third head biceps;
Unilateral variations in the formation of the median nerve, with the presence of the third head of the biceps brachii entrapping the nerve are very rare. These variations were observed on the right side, of a 30-year-old male cadaver during routine dissection at the Department of Human Anatomy, University of Nairobi. The median nerve was formed by the union of three contributions; two from the lateral cord and one from the medial cord. An additional head of the biceps brachii looped over the formed median nerve. On the left side, the median nerve was formed classically by single contributions from the medial and the lateral cords. These variations are clinically important because symptoms of high median nerve compression arising from similar formations are often confused with more common causes such as radiculopathy and carpal tunnel syndrome. Clin. Anat. 25:961–962, 2012. © 2012 Wiley Periodicals, Inc.