. Un traité pratique sur le diagnostic médical pour les étudiants et les médecins. Itsannexe périphérique, et est, plus-plus, influencé par les centres psychiques supérieurs, qu'il dans les turnmodities. Il influence ou modifie les centres inférieurs—(1) fonctionnel, (2)vaso-moteur, (3) moteur et (4) sen-superficiel. Le résultat de ce méchanisme dans le cas du stomachis : 1. Cette alterationfonctionnelle ou maladie organique (a) du centre de gaz-trique, (6) des centres de contrôle supérieur, ou (c) de la nervosité qui relie le centre et l'organe (nerf pneumogastrique), produit des symptômes gastriques. 2.que les maladies gastriques produisent re-Flex
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. A practical treatise on medical diagnosis for students and physicians . itsperipheral adjunct, and is, more-over, influenced by the higher, psychical centres, which it in turnmodifies. It influences or modifieslower centres—(1) functional, (2)vasomotor, (3) motor, and (4) sen-sory. The result of this mech-anism in the case of the stomachis : 1. That functional alterationor organic disease of (a) the gas-tric centre, or (6) of centres ofhigher control, or (c) of the nervethat connects the centre and theorgan—pneumogastric nerve—produces gastric symptoms. 2.That gastric diseases produce re-flex symptoms in other organs, ascardiac palpitation. 3. That dis-ease of other organs produces gas-tric symptoms or disease ; instancethe vomiting of pregnancy, ofrenal calculus, or of disease of thetesticle, and the gastritis of kidneydisease. Thus vomiting is causedby emotion (higher centre) influencing the pneumogastric (lower centre);by a tumor pressing upon or destroying the pneumogastric centre;or by a tumor, such as an aneurism, pressing on the pneumogastric. Showing the innervation of the digestivesystem. 3012 DISEASES OF THE STOMACH. nerve. I have taken the simplest illustrations. AVheu we come to thestudy of gastric neuroses, the extraordinary influence of the nervousmechanism Avill be appreciated ; and when hysteria is studied, the phys-iology of its extreme gastric symptoms will be recognized. When thepiechanism and clinical course of vomiting are studied, it will be foundamong other causes to be frequently due to affections of the blood, thepoisons of which irritate either cerebral centres or nerve-plexuses in thestomacli. Vascular Mechanism. Gastric diseases also arise because of somedisturbance in the vascular supply. Thus in heart disease Avith venousstasis the gastric veins become the seat of congestion, with consequentgastric catarrh ; and hepatic disease causes portal congestion and gastriccatarrh. 3. Functional Symptoms. Any local disease of the stomach m
