The Dynamic Theory of Life and Mind; An Attempt to Show That All Organic Beings Are Both Constructed and Operated by the Dynamic Agencies of Their Respective Enviroments (Paperback)

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1909 edition. Excerpt: ...cranial nerves. There are three principal plexuses formed in connection with the sympathetic, which minister to the viscera of the chest and abdomen. These are the cardiac, solar, and hypogastric plexuses. The great cardiac plexus is situated opposite tho third dorsal vertebra, at the point whero the bronchial tubes branch off from the windpipe. It is formed by the union of the middle and inferior cardiac nerves, which, in turn, are formed by the convergence and union of fibres from tho cervical ganglia. The great cardiac plexus also receives fibres from the first thoracic ganglion, the pneumogastric i Also called the foramen lacerum postering. 1 A muscle at the posterior part of the neck and shoulder which elevates the shoulder, depresses it, or carries it back, according as one or other set of fibres is contracted. and the hypoglossal nerves--tenth and twelfth pairs cranial nerves. The fibres passing from the great cardiac plexus, after being concerned in various complications of plexuses and ganglions, finally proceed to the heart and the great blood vessels, and follow the latter throughout tho system in all their subdivisions and ramifications. From the sixth, seventh, eighth and ninth, and sometimes the tenth, thoracic gangliai branches start out, descending inwards and uniting into a single trunk to form what is called the great splanchnic nervo. It enters the abdomen, passes behind the stomach, and divides into several branches which enter the semilunar ganglion. Thence numerous filaments emerge to form the great solar plexus, which is situated on the vertebral column, the aorta, and the pillars of the diaphragm. The nerves issuing from this plexus follow the aorta and all its branches, supply the liver, spleen, pancreas, kidneys, testes...