Musculocutaneous and median nerve connections within, proximal and distal to the coracobrachialis muscle

• Autorzy: Loukas M , Aqueelah H.
• Języki publikacji: EN

Abstrakty

EN

During dissection of the brachial plexus variations have frequently been observed in the formation and further ramification of the cords to form the musculocutaneous and median nerves (MCN and MN). The present study was undertaken to localise the connections (the communication pattern) of the MN and the MCN with respect to the point of entrance of the MCN to the coracobrachialis muscle. A total of 129 formalin-fixed cadavers were dissected for this purpose. For simplicity we classified the communication patterns as Types I, II, III and IV. In 82 (63.5%) of 129 cadavers 119 communications were found to be present. We were able to identify 4 different patterns of communication. Type I (54 communications, 45%): the communications were proximal to the point of entry of the MCN into the coracobrachialis, Type II (42 communications, 35%): the communications were distal to the point of entry of the MCN into the coracobrachialis, Type III (11 communications, 9%): the MCN did not pierce the coracobrachialis and Type IV (9 communications, 8%): the communications were proximal to the point of entry of the MCN into the coracobrachialis and additional communication took place distally. Precise knowledge of variations in MCN and MN communications may prove valuable in traumatology of the shoulder joint, as well as in plastic and reconstructive repair operations.

Słowa kluczowe

EN

musculocutaneous nerve; median nerve; communication; coracobrachialis muscle; connection; brachial plexus

• Wydawca: -
• Czasopismo: Folia Morphologica
• Rocznik: 2005
• Tom: 64
• Numer: 2
• Opis fizyczny: p.101-108,fig.,ref.

Twórcy

autor

Loukas M

• American University of the Caribbean, Sint Maarten, Netherlands Antilles

autor

Aqueelah H.

Bibliografia

• 1. Buch-Hansen K (1955) Uber Varietaten des Nervus medianus und des Nervus musculocutaneous und deren Beziehungen. Anat Anz, 102: 187–203.
• 2. Choi D, Rodriguez-Neidenfuhr M, Vazquez T, Parkin I, Sanudo JR (2002) Patterns and connections between the musculocutaneous and median nerves in the axilla and arm. Clin Anat, 15: 11–17.
• 3. Dalley AF, Moore KL (1999) Clinically oriented anatomy. 4th Ed. Lippincott Williams & Wilkins, Baltimore, pp. 712, 731, 774.
• 4. Flatow EL, Bigliani LU, April EW (1989) An anatomical study of the musculocutaneous nerve and its relationship to the coracoid process. Clin Orthop, 244: 166–171.
• 5. Gegenbaur C (1867) Uber das Verhaltniss des N. musculocutaneous zum N. medianus. Jens Ztschr fur Med Nature, 3: 258–263.
• 6. Hirasawa K (1931) Untersuchungen uber das periphere Nervensystem, Plexus brachialis und die Nerven der oberen Extremitat. Arb Anat Inst Kaiserlichen Univ Kyoto, A2: 135–136.
• 7. Kosugi K, Shibata S, Yamashita H (1992) Supernumery head of biceps brachii and branching pattern of the musculocutaneous nerve in Japanese. Surg Radiol Anat, 14: 175–185.
• 8. Osborne AWH, Birch RM, Munshi P, Bonney G (2000) The musculocutaneous nerve: result of 85 repairs. J Bone and Joint Surg, 82: 1140–1142.
• 9. Testut L (1883) Recherches anatomiques sur l’anastomose du nerf musculo-cutane avec le nerf median. J Anat Physiol Norm et Path Homme Animaux, 19: 103–108.
• 10. Vallois HV (1922) Recherches sur le trajet et les anastomoses du nerf musculocutane au niveau du bras (etude statistique). Arch Anat Histol Embryol, 1: 184–204.
• 11. Venieratos D, Anagnostopoulou S (1998) Classification of communications between musculocutaneous and median nerves. Clin Anat, 11: 327–331.
• 12. Villar MF (1888) Anastomoses du median et du musculocutane et du median. Bull Mem Soc Anat Paris, pp. 607–615.
• 13. Williams PL, Banister LH, Berry MM, Collins P, Dyson M, Dussek JE, Ferguson MWJ (eds.) (1995) Gray’s anatomy. 38th Ed. Churchill Livingstone, New York, pp. 1266–1269.
• 14. Loukas M, Hullet J, Wagner T (2005) The Clinical anatomy of the inferior phrenic artery (in press).