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Spinal nerve composition and innervation of the axillary nerve
Author(s) -
Kang MyongSoo,
Woo JungSu,
Hur MiSun,
Lee KyuSeok
Publication year - 2014
Publication title -
muscle and nerve
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.025
H-Index - 145
eISSN - 1097-4598
pISSN - 0148-639X
DOI - 10.1002/mus.24297
Subject(s) - axillary nerve , medicine , anatomy , deltoid curve , accessory nerve , deltoid muscle , brachial plexus , spinal nerve , nerve root , magnetic resonance neurography , musculocutaneous nerve , dorsum , radiology , magnetic resonance imaging
: The purpose of this study was to evaluate the spinal nerve composition of the axillary nerve and the contribution of each spinal nerve. Methods : Thirty brachial plexi extracted from Korean adults (15 men, 14 women, 1 unknown; left side, 13; right side, 17) were examined in this study. Results : The frequency of the contribution of C4 was 13.3%, and it was mainly innervated the deltoid and teres minor muscles. The frequency of inclusion of C7 was 20.0%. C7 fibers were mainly involved in the deltoid and cutaneous branches. The axillary nerve was primarily composed of fibers from C5 and C6 in 66.6%; C4, C5, and C6 in 13.3%; and C5, C6, and C7 in 20.0%. Conclusions : These findings may be helpful to diagnose damage to axillary nerve structures that occur in such injuries as humerus fractures. Muscle Nerve 50 : 856–858, 2014