Liu Hong-Fu, Won Hyung-Sun, Chung In-Hyuk, Oh Chang-Seok, Kim In-Beom
Catholic Institute for Applied Anatomy, Department of Anatomy, College of Medicine, The Catholic University of Korea, Seoul, Korea.
Clin Anat. 2014 Jan;27(1):97-101. doi: 10.1002/ca.22308. Epub 2013 Nov 19.
The purpose of this study was to clarify the composition of the internal and external branches (IB and EB) of the accessory nerve. Fifty-seven half heads of 34 adult cadavers were used. The IB and EB of the accessory nerve were mixed with the cranial root (CR), vagus nerve, and spinal root (SR). The IB was classified into five types and the EB into four types according to their composition. The IB consisted of only CR in 7.0% of the 57 cases, and of the CR and the vagus nerve in 52.6%; the IB did not exist in 12.3%. The EB was only composed of the SR in 19.3% of cases, the SR and CR in 52.6%, and the SR, CR, and the vagus nerve in 21.1%. There were 14 combinations of IB and EB types. The most common combination was the IB with the CR and the vagus nerve, and the EB with the SR and CR (31.6%). The combination of IB and EB comprising CR and SR, respectively, was not observed. The IB and EB are known to consist of the CR and SR of the accessory nerve, respectively. However, this study shows that there are no IB and EB comprising only the CR and SR, respectively, and the branches have various combinations of the CR, SR, and vagus nerve.
本研究的目的是阐明副神经内支和外支（IB和EB）的组成。使用了34具成年尸体的57个半侧头部。副神经的IB和EB与颅根（CR）、迷走神经和脊髓根（SR）混合。根据其组成，IB分为五种类型，EB分为四种类型。在57例中，7.0%的IB仅由CR组成，52.6%由CR和迷走神经组成；12.3%不存在IB。19.3%的病例中EB仅由SR组成，52.6%由SR和CR组成，21.1%由SR、CR和迷走神经组成。IB和EB类型有14种组合。最常见的组合是IB由CR和迷走神经组成，EB由SR和CR组成（31.6%）。未观察到IB和EB分别由CR和SR组成的组合。已知IB和EB分别由副神经的CR和SR组成。然而，本研究表明，不存在仅分别由CR和SR组成的IB和EB，且这些分支有CR、SR和迷走神经的各种组合。
