The depressor nerve of the rabbit

Abstract

Abstract Since the discovery of the depressor nerve, much work has been done in connexion with its important influence on the regulation of blood- pressure, but (so far as I am aware) no attempt has been made to determine its histological structure. Origin and Course of the Depressor. Cyont gives the following description of the origin of the nerve. The depressor nerve in the animals worked upon usually begins with two branches at the point of departure of the superior laryngeal nerve from the vagus, one from each of the two nerves. The nerve soon after its origin passes towards the cervical sympathetic, in company with which it descends the neck towards the inferior cervical ganglion. With this ganglion it is often connected by fine branches: it then turns inward past the subclavian artery, and loses itself at the base of the heart, to which it passes from behind between the pulmonary artery and the aorta. Just before entering the heart tissue the two depressors lie close to one another.