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KMID : 0855520140270040219
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Korean Journal of Physical Anthropology
2014 Volume.27 No. 4 p.219 ~ p.223
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Anatomical Studies of the Upper and Lower Subscapular Nerves
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Kim Chae-Hyun
Hur Mi-Sun
Lee Kyu-Seok
Woo Jung-Su
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Abstract
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This study aimed to determine the number of branches of the upper and lower subscapular nerves and to classify the spinal nerve compositions of each branch.
Twenty sides of the brachial plexus extracted from Korean adult cadavers were used in this study.
The upper subscapular nerve was composed of three branches in 16 sides (80.0%), composed of four branches in 4 sides (20.0%). The lower subscapular nerve arose from posterior cord with one branch, innervating the subscapularis and the teres major muscles.
In case of the upper subscapular nerve, the first branch was comprised of C5 in 40.0%, C5 and C6 in 60.0%, the second branch was composed of C5 in 15.0%, C5 and C6 in 85.0%, the third branch was arisen from C5 and C6 in 75.0%, C6 in 25.0% and the forth branch appeared in four sided was derived from C6.
The nerve branch innervating the subscapularis muscle was composed of C6 in 55.0%, C5 and C6 in 40.0%, C6 and C7 in 5.0%. The nerve branch innervating the teres major muscle was composed of C6 and C7 in 65.0%, C5, C6 and C7 in 25.0%, and C6 in 10.0%.
The injury was often due to an accidental damage or lesion of the subscapular nerve, these anatomical results may be helpful to predict the involving area of the lesion.
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KEYWORD
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Upper subscapular nerve, Lower subscapular nerve, Spinal nerve composition
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