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鑑于头颈外科手术日益增多,术中常涉及胸琐乳突肌及进入该肌之副神经和颈丛神经,为此,作者解剖了50例100侧标本,所得结论如下:胸锁乳突肌之神经可来自颈丛,可来自副神经外支,也可来自以上二神经的吻合支,其中双测完全对称的仅10％。来自颈丛的占86％,其中44％来自C_2和C_2前支组成的第二颈袢,28％来自C_3前支,3％来自C_3和C_4的神经袢,2％来自C_1神经泮。副神经外交经颈内静脉前或后到达胸锁乳突肌前缘,可单独一支,也可分成二、三支或更多小支进入胸锁乳突肌。关于副神经外支与颈丛的吻合文:1883年Maubrae提出副神经外支与C_3或C_2的分支吻合形成一弓,由此发出神经纤维到胸锁乳突肌。根据该氏的理论,作者发现Maubrae弓有三种类型。第一类,占51％,又可分五型:Ⅰa型,副神经外支与颈丛的一支吻合,
In view of the increasing number of head and neck surgery, surgery often involves the chest and abscess and into the muscle of the nerve and cervical plexus nerve, for which the author dissected 50 cases of 100 specimens, the conclusions are as follows: sternocleidomastoid muscle The nerves may come from the cervical plexus, may come from the extra-lateral nerve branches, but also from the anastomotic branches of the above two nerves, where only 10% of the fully symmetrical double-test. From the cervical plexus, 86%, of which 44% from the C_2 and C_2 anterior branch of the second neck, 28% from the C_3 anterior branch, 3% from C_3 and C_4 neuroendroglialis, 2% from the C_1 nerve. Parasympathetic diploma through the internal jugular vein before or after reaching the leading edge of sternocleidomastoid, can be a separate, can also be divided into two, three or more small branches into the sternocleidomastoid muscle. Anastomosis of the Paraspinal Nerve with the Cervical Plexus: In 1883 Maubrae proposed that the accessory nerve branch anastomoses with the branch of C_3 or C_2 to form a bow, thereby issuing nerve fibers to the sternocleidomastoid muscle. According to this theory, the authors found that there are three types of Maubrae bows. The first category, accounting for 51%, can be divided into five types: Ⅰ a type, parasympytic branch and cervical plexus anastomosis,