A text-book of materia medica, therapeutics, and pharmacology / by George Frank Butler.

Date:
1897
Catalogue details

Licence: Public Domain Mark

Credit: A text-book of materia medica, therapeutics, and pharmacology / by George Frank Butler. Source: Wellcome Collection.

Provider: This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.

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    irritated, and an impression is conveyed by them to Auerbach’s plexus between the muscles in the walls of the stomach, from which plexus, or ganglion, the influence is transmitted to the mus- cles themselves, causing increased activity or peristalsis. Another method by which peristalsis is stimulated occurs when the impression is conveyed by the sensory nerves directly to the center in the medulla, and from there through the motor fibers of the vagus to Auerbach’s plexus, affecting the muscles in the man- ner above described. The cut (Fig. 4) will serve to illustrate the modus operandi. . Fig 3.—Diagram illustrating the supposed nervous connections of the stomach. A gentle stimulus applied to the walls of the stomach is transmitted by the afferent nerves (A) to a nerve-center (2?), and thence along the vaso-dilating nerves (C) and the secreting nerves (D) to the vessels of the mucous membrane and the cells of the gastric follicles. A stronger stimulus is transmitted up to the nerve- center (E), and thence along the vaso-constricting fibers (F) and the secreting fibers (G) of the mu- cous follicles. A still stronger stimulus is transmitted to H, and thence along the motor nerves to the abdominal walls (K, K), causing them to contract and produce retching or vomiting. IV. Bitters augment absorption by increasing the blood-supply to the mucous membrane of the stomach. It is a physiological fact that the larger the blood-supply passing through the blood- vessels, and the greater the amount of lymph conveyed through the lymph-channels, the more rapid the absorption. V. Bitters are more or less antiseptic and arrest fermentation, both physiological and pathological. The peptonization of food is 12