IJCRR - 6(6), March, 2014
CLINICALLY SIGNIFICANT UNILATERAL VARIATION OF MUSCULOCUTANEOUS NERVE
Author: Krishnendu Bhowmik, Arpita Sarkar
During routine dissection conducted for undergraduates study in the Department of Anatomy, Kolkata Medical College, variations in the course of musculocutaneous nerve was found in two cadavers.In normal individuals the Musculocutaneous nerve arises from the lateral cord of the brachial plexus, passes inferolaterally and then pierces through the coracobrachialis muscle after supplying it. Then it descends between the biceps and the brachialis muscle, sending branches to both the muscle and continues as the lateral cutaneous nerve of the forearm. In our cases we found that the musculocutaneous nerve did not pierce the coracobrachialis muscle and in the middle 1/3rd of arm, it communicates with median nerve. Knowledge about these variations helps surgeons during operation of brachial plexus lesions, arthoscopy of shoulder joints and repair of fracture humerus.
Keywords: Brachial plexus, Coracobrachialis, Median nerve, Musculocutaneous nerve
Krishnendu Bhowmik, Arpita Sarkar. CLINICALLY SIGNIFICANT UNILATERAL VARIATION OF MUSCULOCUTANEOUS NERVE International Journal of Current Research and Review. 6(6), March, 75-79
1. Basar, R., M. M. Aldur, H. H. Celik, M. Yüksel, and A. B. Tascioglu. "A connecting branch between the musculocutaneous nerve and the median nerve." Morphologie: bulletin de l'Association des anatomistes 84, no. 266 (2000): 25-27.
2. Bhattarai, C., and P. P. Poudel. "Unusual variation in musculocutaneous nerves." Kathmandu University Medical Journal 7, no. 4 (2009): 408-410.
3. Chauhan, R., and T. S. Roy. "Communication between the median and musculocutaneous nerve–a case report." Journal of the Anatomical Society of India 51, no. 1 (2002): 72-75.
4. Chitra R. Multiple bilateral neuroanatomical variations of the nerves of the arm. Neuroanatomy 2007; 6:43-5.
5. Choi, D., Rodríguez-Niedenführ, M., Vázquez, T., Parkin, I. and Sañudo, J. R. (2002), Patterns of connections between the musculocutaneous and median nerves in the axilla and arm. Clin. Anat., 15: 11–17. Doi: 10.1002/ca.1085
6. Eglseder Jr, W. A., and M. Goldman. "Anatomic variations of the musculocutaneous nerve in the arm." American journal of orthopedics (Belle Mead, NJ) 26, no. 11 (1997): 777-780.
7. El-Naggar, Mostafa M. "A study on the morphology of the coracobrachialis muscle and its relationship with the musculocutaneous nerve." FOLIA MORPHOLOGICA-WARSZAWAENGLISH EDITION- 60, no. 3 (2001): 217- 224.
8. Gümü?alan, Y., Fatih Yazar, and Hasan Ozan. "Variant innervation of the coracobrachialis muscle and unusual course of the musculocutaneous nerve in man." Kaibogaku zasshi. Journal of anatomy 73, no. 3 (1998): 269.
9. Guerri?Guttenberg, Roberto A., and Mariana Ingolotti. "Classifying musculocutaneous nerve variations." Clinical Anatomy 22, no. 6 (2009): 671-683.
10. Jamuna, M. "Clinically significant variations of the cords of the brachial plexus in relation to axillary artery." International Journal of Anatomical Variations 4 (2011): 9-11.
11. Jamuna, M., G. Amudha, and Jamuna Meenakshisundaram. "A Cadaveric Study on the Anatomic Variations of the Musculocutaneous Nerve in the Infraclavicular Part of the Brachial Plexus." J of Clinical and Diagnostic Research 5, no. 6 (2011): 1144-1447.
12. Loukas, Marios, and Haqq Aqueelah. "Musculocutaneous and median nerve connections within, proximal and distal to the coracobrachialis muscle." Folia Morphol (Warsz) 64, no. 2 (2005): 101-108.
13. Le Minor IM. A rare variation of the median and musculocutaneous nerves in man. Arch Annt Histol Embryul. 1990;73:33-42.
14. Maheria, Pankaj B., et al. "A study of anatomical variations of the musculocutaneous nerve." Int J Res Med. 2013; 2(2);1-4
15. Nakatani, Toshio, Shigeki Mizukami, and Shigenori Tanaka. "Three cases of the musculocutaneous nerve not perforating the coracobrachialis muscle."Kaibogaku zasshi. Journal of anatomy 72, no. 3 (1997): 191.
16. Nayak S, Samuel VP, Somayaji N. Concurrent variations of median nerve, musculocutaneous nerve and biceps brachii muscle. Neuroanatomy. 2006; 5: 30–32.
17. Prasada Rao, P. V. V., and S. C. Chaudhary. "Communication of the musculocutaneous nerve with the median nerve." East African medical journal77, no. 9 (2000): 498-503.
18. Sadler, Thomas W. Langman's medical embryology. Wolters Kluwer Health, 2011.
19. Williams PL, Bannister LH, Berry MM, Collins P, Dyson M, Dussek JE et al. Nervous system. In: Gray’s Anatomy. 38th edition. Churchill Livingston, Edinburgh, London I995: 1267-72.
20. Uzun, Ahmet, and Leonard L. Seelig. "A variation in the formation of the median nerve: communicating branch between the musculocutaneous and median nerves in man." FOLIA MORPHOLOGICAWARSZAWA-ENGLISH EDITION-60, no. 2 (2001): 99-102.
21. Venieratos, D., and S. Anagnostopoulou. "Classification of communications between the musculocutaneous and median nerves." Clinical Anatomy 11, no. 5 (1998): 327-331