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The Antagonism of Therapeutic Agents; And What It Teaches (Paperback) Loot Price: R447
Discovery Miles 4 470
The Antagonism of Therapeutic Agents; And What It Teaches (Paperback): John Milner Fothergill

The Antagonism of Therapeutic Agents; And What It Teaches (Paperback)

John Milner Fothergill

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Loot Price R447 Discovery Miles 4 470

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Purchase of this book includes free trial access to www.million-books.com where you can read more than a million books for free. This is an OCR edition with typos. Excerpt from book: CHAPTER III. THE RHYTHMICALLY DISCHARGING CENTRES; AND THE EFFECTS OF DRUGS THEREUPON. The influence of the nervous system upon the different portions of the body, as muscular movement, secretion, etc., is, according to Hermann, as yet unknown, except in so far as we can regard the subject from a merely mechanical point of view. So regarded the nervous system is a "liberating force," i. e., a force which leads to a conversion of a certain amount of potential into kinetic energy. He says further: " An infinitely small liberating force may liberate large quantities of kinetic energy, and it is exceedingly probable that even the liberating forces of the nervous system, if measured as forces, would be very small in amount, and consequently that the chemical changes necessary to their evolution, as to that of all the other forces of the organism, are of small magnitude." In consequence of the small amount of chemical change involved in the decomposition of the nerve-cells by which this liberating force is evolved, little as yet is known about the how of this action. That some chemical change is essential is easily comprehensible. Blood containing oxygen is absolutely necessary to this chemical change, but the matter is somewhat complex, as we shall shortly see. The nervous centres with which the present inquiry is engaged are those motor centres which govern the circulation and the respiration, and which discharge, or explode rhythmically, and send out efferent impulses which set up the requisite muscular actions. These centres exist for the circulation essentially in the ganglia of the heart, though in intimate connection with other parts, especially the vaso-motor centre in the medulla oblongata. For the respiration, as we shall shortly see, in the medulla solely; from whic...

General

Imprint: General Books LLC
Country of origin: United States
Release date: February 2012
First published: February 2012
Authors: John Milner Fothergill
Dimensions: 246 x 189 x 2mm (L x W x T)
Format: Paperback - Trade
Pages: 62
ISBN-13: 978-0-217-99935-9
Categories: Books
LSN: 0-217-99935-2
Barcode: 9780217999359

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