前言关于颈神经襻的研究,就所涉猎到的文献言时,对于襻的形成、位置及分支等虽均有所记述,但多不甚详尽。在襻的形成方面:Gray、Morris、平泽兴、Cunningham及Grant等在其所著的解剖学教本中,指出由第2、3颈神经发支连结成为下行颈神经(nervus descendens cervicalis)与舌下神经降支会合成襻,而Иванов则谓除第2、3颈神经外还有第4颈神经也参与襻的形成。在Тонков、Привес及Clark等人所著的 Preface The study on the cervical nerves, although there are descriptions of the formation, location, branches, etc. of the documents involved, but they are not exhaustive. In the formation of pterygium: Gray, Morris, Pyeongtaek Hing, Cunningham and Grant et al. In their anatomy of anatomy, pointed out that the second and third branches of the nerves of the nerves descending the cervical nerve (nervus descendens cervicalis) and the tongue Lower descending nerve branch synthesis 襻, and Иванов said that in addition to the 2nd and 3rd cervical nerves there is also the 4th cervical nerve is also involved in the formation of 襻. In Тонков, Привес and Clark et al