导言关於舌下神经襻的构成、位置及联属,在多数解剖书刊上,叙述欠详,而且大致相同,易使初学者误认舌下神经襻真是一个联属简单,固定不变的结构。关於舌下神经襻之位置,仅Deaver及Grant等氏之著作,稍有所述,他们说有时包藏在颈动脉鞘以内,甚或有深於颈内静脉者,而Morris教本上指出襻之藏在鞘内,尚属可能,至於在颈内静脉之深面者,当属少见云。如以襻之高低水平来讲,皆谓居颈之中点,与环状软骨弓相对,仅Morris氏的教本,对 Introduction On the composition, location and affiliation of hypoglossal nerve plexus, in most anatomical publications, the narration is not detailed, and roughly the same, easy for beginners to mistakenly hypoglossal nerve is really an affiliate of simple, fixed structure. About the location of the hypoglossal nerve, only Deaver and Grant’s work, a little said, they said sometimes enclosed within the carotid sheath, or even deeper than the internal jugular vein, and Morris textbook pointed out that the possession of Intrathecal, is still possible, as deep in the jugular vein, when it is rare cloud. Such as the level of 襻 in terms of level, are called the neck of the midpoint, and the ring opposite the cricoid arch, only Morris’s textbook, right