Volume 1
On the anatomy, physiology, and pathology of the chimpanzee / by Charles F. Sonntag.
- Sonntag, Charles F. (Charles Frederick), -1925
- Date:
- 1923
Licence: In copyright
Credit: On the anatomy, physiology, and pathology of the chimpanzee / by Charles F. Sonntag. Source: Wellcome Collection.
94/118 page 414
![branch to the inferior mesenteric plexus, and the ovarian plexus (O.P). The cord connecting the second and third ganglia gives twigs to the aortic plexus (A.P). The third ganglion (G.3) lies at the beginning of the common iliac artery. It gives off rami communicantes to the lower two lumbar nerves, hypogastric nerves (H.N) and the external iliac nerves. The fourth ganglion (G.4), situated within the pelvis, gives off strong rami communicantes to the sacral nerves, and a nerve to the hsemorrhoidal plexus. The right cord has two abdominal and one pelvic ganglia. The first ganglion gives rami communi- cantes to the lumbar nerves from its lateral aspect. From its mesial aspect a stout cord comes and divides into an upper branch to the left renal plexus (L.R.P) and a lower bunch of three nerves to the inferior mesenteric plexus (I.M.P). The second ganglion is at the level of the common iliac artery. Vagus and Sympathetic Plexuses. A. Pharyngeal Plexus :—This is formed by branches of the glossopharyngeal nerve and sympathetic, and the pharyngeal branch of the vagus. B. Cardiac Plexus (text-fig. 45 B):—The cardiac plexus lies chiefly between the aortic arch and heart anteriorly, and the trachea posteriorly. It receives two cardiac branches of the left vagus. One rises in the neck and divides into four branches on the front of the aortic arch ; two of the branches pass under the arch to the deep part of the plexus, the third runs to the surface of the arch, and the fourth supplies the pulmonary artery. No sympathetic filaments run over the arch to the superficial part of the plexus (S.C.P). The deep part of the plexus (D.C.P) communicates with the superficial part and receives(1) Many filaments from the left sympathetic, a thoracic cardiac branch of the left vagus, the cervical cardiac branch of the right vagus, three thoracic cardiac branches of the right vagus and filaments from the right cervical sympathetic. The plexus contains two clusters of ganglia, one behind the beginning of the innominate artery, and the other between the aortic arch and bifurcation of the trachea. The large vessels arising from the arch have associated plexuses or sympathetic nerve cords. C. Anterior pulmonary plexuses derived from the vagi. No separate sympathetic filaments are seen. D. Posterior pulmonary plexuses derived from the vagi and upper thoracic ganglia of the sympathetic. E. Solar Plexus (text-fig. 46) :—The gangliated ring, which acts as a, centre, lies in front and at the sides of the coeliac axis. It receives the greater part of the right vagus (R.V) and the great splanchnic nerve of the left side (G.S.N). It gives off a trunk at its lower end which runs into the gangliated cord of the sympathetic of the left side (A.G.C). It gives off the coeliac [92]](https://iiif.wellcomecollection.org/image/b2982123x_0001_0094.jp2/full/800%2C/0/default.jpg)
