Volume 2

Manual of practical anatomy / by D.J. Cunningham.

  • Cunningham, D. J. (Daniel John), 1850-1909.
Date:
1903
Catalogue details

Licence: Attribution-NonCommercial 4.0 International (CC BY-NC 4.0)

Credit: Manual of practical anatomy / by D.J. Cunningham. Source: Wellcome Collection.

Provider: This material has been provided by The University of Leeds Library. The original may be consulted at The University of Leeds Library.

    104/652 (page 80)
    tliis muscle is only represented by a few slender muscular fasciculi, which are difiicuU to isolate from the areolar tissue in which they lie. Pneumogastric Nerves (nervi vagi).—The pneumogastric nerves can now be followed throughout their entire course within the thorax. They traverse both the superior and posterior mediastinal spaces, but differ so much in their relations on the two sides of the body that it is best to examine each separately. The left pneumogastric nerve enters the thorax in the in- terval between the left common carotid and left subclavian arteries, and behind the left innominate vein (Fig. 37, p. 70). It has already been observed crossing the arch of the aorta Fig. 41.—Tracing of a section through the lower part of the Posterior Mediastinum, where its anterior wall is formed by the diaphragm. behind and to the left side of the phrenic nerve and the two superficial cardiac nerves (Fig. 35, p. 67). Here also it has been seen to give off its recurrent laryngeal branch. Leaving the aorta, it sinks behind the root of the left lung (Fig. 36, p. 68), and at once breaks up into a number of branches, which unite in a plexiform manner to form the left posterior pulmoi- ary plexus. It issues from this plexus in the form of one or two cords, which pass to the anterior aspect of the cesophagus. Upon the oesophagus another plexus—the plexus guhc—is formed. Both of the pneumogastric nerves take part in the formation of this plexus. From the plexus gulre the left pneumogastric emerges as one trunk, and passes out of the thorax by the oesophageal opening of the diaphragm. Within