A variation in the formation of the median nerve: communicating branch between the musculocutaneous and median nerves in man

• Autorzy: Uzun A , Seeling L.L.,Jr.
• Języki publikacji: EN

Abstrakty

EN

We encountered variation in the formation of the median nerve in a 66-year-old male cadaver during dissection of the upper extremity of 20 adult cadavers. The dissections were made at the Department of Cellular Biology and Anatomy, Louisiana State University Medical Center. The median nerve was formed by fusion of four branches, three of them coming from the lateral cord and one from the medial cord. The normal radix from the lateral cord followed a very close oblique course over the axillary artery. The first unusual radix to the median nerve had an anastomoses from the musculocutaneous nerve to the median nerve in the proximal part of the left arm. The second unusual radix also came from the musculocutaneous nerve after it had pierced the coracobrachialis muscle and then joined with the median nerve. These kinds of variations are vulnerable to damage in radical neck dissection and other surgical operations of the axilla and upper arm. The communicating branch can be explained on the basis of its embryologic development and also ought to be distinguished from the other nerve variations in the upper extremity. The aim of this paper is to provide additional information for the classification of previously found communications between the musculocutaneous and median nerves.

• Wydawca: -
• Czasopismo: Folia Morphologica
• Rocznik: 2001
• Tom: 60
• Numer: 2
• Opis fizyczny: p.99-101,fig.,ref.

Twórcy

autor

Uzun A

• Ondokuz Mayis University Medical Faculty, 55139-Kurupelit/Samsun-Turkey

autor

Seeling L.L.,Jr.

Bibliografia

• 1. April EW (1985) Anatomy. Harval Publishing Co, Toronto.
• 2. Eglseder WA, Goldman M (1997) Anatomic variations of the musculocutaneous nerve in the arm. Am J Orthop, 26 (11): 777–780.
• 3. Gacek RR (1990) Neck dissection injury of a brachial plexus anatomical variant. Arch Otolaryngol Head and Neck Surg, 116: 356–358.
• 4. Gumusalan Y, Yazar F, Ozan H (1998) Variant innervation of the coracobrachialis muscle and unusual course of the musculocutaneous nerve in man. Kaibogaku Zasshi, 73 (3): 269–272.
• 5. Hershman EB (1990) Brachial plexus injuries. Clin Sports Med, 9: 311–329.
• 6. Hollinshead WH (1982) Anatomy for surgeons. The back and Limbs. Harper & Row, Philadelphia.
• 7. Iwamoto S, Kimura K, Takahashi Y, Konishi M (1990) Some aspects of the communicating branch between the musculocutaneous and median nerves in man. Okajimas Folia Anat Jpn, 67 (1): 47–52.
• 8. Kaus M, Wotowicz Z (1995) Communicating branch between the musculocutaneous and median nerves in human. Folia Morphol (Warszawa) 54: 273–277.
• 9. Kerr AT (1918) The brachial plexus of nerves in man, the variation in its formation and branches. Am J Anat, 23: 285–395.
• 10. Kosugi K, Shibata S, Yamashita H (1992) Supernumerary head of biceps brachii and branching pattern of the musculocutaneous nerve in Japanese. Surg Radiol Anat, 14 (2): 175–185.
• 11. Le Minor JM (1990) A rare variation of the median and musculocutaneous nerves in man. Arch Anat Histol Embryol, 73: 33–42.
• 12. Miller RA (1934) Comparative studies upon the morphology and distribution of the brachial plexus. Am J Anat, 54: 143–175.
• 13. Nakatani T, Mizukami S, Tanaka S (1997) Three cases of the musculocutaneous nerve not perforating the coracobrachialis muscle. Kaibogaku Zasshi, 72 (3): 191–194.
• 14. O’Neil T, Giancarlo T, Spitzer AR (1990) The case of the missing median nerve. Muscle Nerve, 13 (9): 882–883.
• 15. Sargon MF, Uslu SS, Celik HH, Aksit D (1995) A variation of the median nerve at the level of the brachial plexus. Bull de I Assoc des Anatom, 79 (246): 25–26.
• 16. Uzun A, Bilgic S (1999) Some variations in the formation of the brachial plexus in infants. Tr J of Med Sci, 29: 573–577.
• 17. Venierotos D, Anagnostopoulou S (1998) Classification of communications between the musculocutaneous and median nerves. Clin Anat, 11 (5): 327–331.
• 18. Walsh JF (1877) The anatomy of the brachial plexus. Am J M Sci, 74: 387–428.
• 19. Williams PL, Warwick R, Dyson M, Bannister LH (1989) Gray’s anatomy, Churchill Livingstone, London.