Die Halsäste des Nervus vagus beim Alpaka,Lama guanicoe pacos (Linné 1758)

Demmel, U. 1980. Die Halsäste des Nervus vagus beim Alpaka, Lama guanicoe pacos (Linné 1758). [The branches of the vagus nerve in the neck of Alpaka, Lama guanicoe pacos (Linné 1758).] (Anatomisches Institut der Universität Köln, Bundesrepublik Deutschland.) — Acta zool. (Stockh.) 61(3): 141–146. Dissections of two newborn and two adult alpacas have shown: that the trapezius musculature of either side is supplied by branches of seven cervical spinal nerves and not by the external ramus of truncus nervi accessorii as in mammals in general; that the nerves which innervate the inner laryngic muscles as well as the mucous membrane of the lower part of the larynx are given off from the main trunk of the vagus nerve just outside the jugular foramen; that a nerve corresponding to the n. laryngeus recurrens of other mammals is absent. It is concluded that the lack of recurvation of the inferior laryngic nerve and the absence of the spinal part of the accessory nerve are character states of tylopod artiodactyls.