Shin Chuog, Lee Seo-Eun, Yu Kee-Hyun, Chae Han-Kyo, Lee Kyu-Seok
Department of Life Science, College of Science and Technology, Yonsei University, Wonju, Korea.
Surg Radiol Anat. 2010 Mar;32(3):235-8. doi: 10.1007/s00276-009-0597-5. Epub 2009 Nov 25.
The suprascapular nerve branches provide efferent innervation to the supraspinatus and infraspinatus muscles as well as sensory innervation to the shoulder joint. This study was carried out to verify the spinal root origins and innervations of the suprascapular nerve. Fifty samples of the suprascapular nerve taken from 37 adult Korean cadavers were used in this study. The suprascapular nerve was found to comprise the ventral rami of the C5 and C6 in 76.0% of the fifty samples; C4, C5, and C6 nerves in 18.0%; and C5 nerve in only 6.0%. The C5 nerve was consistently shown to be the largest in mean diameter and was found to be a major contributor of nerve fibers leading to the suprascapular nerve. This study shows that the main spinal component of the suprascapular nerve is C5 nerve. In most cases, the rate of the involvement of the C4 and C6 nerves (18.0 and 94.0%, respectively) with the suprascapular nerve was less than that of C5 nerve. C4 and C5 nerves were shown to contribute nerve fibers to the supraspinatus and infraspinatus muscles and to both shoulder joints, whereas C6 nerve displayed variable patterns of innervation.
肩胛上神经分支为冈上肌和冈下肌提供传出神经支配,同时也为肩关节提供感觉神经支配。本研究旨在验证肩胛上神经的脊髓神经根起源和神经支配情况。本研究使用了从37具成年韩国尸体上获取的50个肩胛上神经样本。在这50个样本中,发现76.0%的肩胛上神经由C5和C6的腹侧支组成;18.0%由C4、C5和C6神经组成;仅有6.0%由C5神经组成。C5神经始终显示出平均直径最大,并且是通向肩胛上神经的神经纤维的主要贡献者。本研究表明,肩胛上神经的主要脊髓成分是C5神经。在大多数情况下,C4和C6神经与肩胛上神经的关联率(分别为18.0%和94.0%)低于C5神经。C4和C5神经显示为冈上肌和冈下肌以及两个肩关节提供神经纤维,而C6神经的神经支配模式则各不相同。