. On irritation and insanity : a work, wherein the relations of the physical with the moral conditions of man are established on the basis of physiological medicine . once to health, and to dis-ease. Still there remained no other method of laying thefoun-dation of a real science ; as every one will see, after wehave stated the principal truths of physiological medicine. Chapter III. PRINCIPLES OF THE PHYSIOLOGICAL DOCTRINE, This is based upon Irritation. We acknowledge withBrown that life is maintained by excitation alone. Butwe must soon abandon this author, for he takes the road ofabstractio
. On irritation and insanity : a work, wherein the relations of the physical with the moral conditions of man are established on the basis of physiological medicine . once to health, and to dis-ease. Still there remained no other method of laying thefoun-dation of a real science ; as every one will see, after wehave stated the principal truths of physiological medicine. Chapter III. PRINCIPLES OF THE PHYSIOLOGICAL DOCTRINE, This is based upon Irritation. We acknowledge withBrown that life is maintained by excitation alone. Butwe must soon abandon this author, for he takes the road ofabstraction, and considers excitement insulated and in object is, to consider it in the organs and tissues affect-ed, or rather to consider those organs and tissues when ex-cited. This study supplies a certain number of generaltruths, which we propose to state with illustrative examples. Man cannot live but by means of that excitement orstimulation, (synonimous expressions) which the circum-stances or media amid which he lives, exert upon media are not confined in their action to his skin orhis vision, they penetrate all the natural openings of the7. 1 oO ] body, which arc themselves sensible organs, with exten-sive surfaces communicating with the skin. These surfa-ces which may be regarded as internal senses, occupy theinterior of many viscera, and like the external senses, re-ceive the stimulations or excitations of foreign bodies. Thesesurfaces are membranous like the skin, but their structure issomewhat different. Such is the internal membrane of thelarynx, which penetrates by the trachea and the bronchialvessels through all the pulmonary vessels; and the mem-brane of the pharynx which descends by the oesophagusand the stomach, and lines the whole intestinal canal to theanus. These surfaces are incessantly in contact with theforeign bodies; the first with the air and the particles itcontains; the second with the air, the aliments, the bever-age, and whatever can
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