germ which causes pneumonia; sometimes also to other organisms. Recent research has accentuated the importance of purulent and even simple catarrhal affections of the naso-pharynx and the ear as startingpoints for meningeal affections. The specific organisms liable under favorable conditions to cause meningitis are often present in even the healthy pharynx.Sometimes the Polo Ralph Lauren Outlet infective agent seems Nike Air Max to make its way in from the intestinal tract.If we except the cerebrospinal membranes, which are a great breeding-place for many bacteria, we may say that the instances of local bacterial action upon the nervous system are few, while, on the other hand, the nervous system is especially prone to suffer from toxic agents circulating in the blood. These poisons are sometimes separable into several definite constituents, which vary as regards their volatility, their solubility in alcohol and their physiological action. Several North Face Outlet of them have a strong tendency to attack the vasomotor system in various ways; and the disturbance of the circulation thus produced is liable to prevent the normal vascular dilatation which is so necessary for the protection of the body against the invasion of pathogenic organisms. These poisons affect the nervous system in Nike Shoes Australia various characteristic ways, though it is not improbable that they are capable of acting as universal neurotic poisons. In tetanus Brunuer the irritability of the spinal cord is heightened as in strychnia poison; Nike Air Max 90 in diphtheria, the cardiac centres are sometimes strongly involved, though gross lesions may be absent; in influenza the tendency of the poison is The North Face Outlet Store towards the brain more thau in the case of some of the analogous diseases. Besides the psychoses which are common, acute hemorrhagic encephalitis occurs.As regards chronic poisoning or its results, we find disseminated sclerosis after various acute Nike Australia infectious diseases, and especially after malaria; but it is notprobable that they are due to the action of the specific virus of this antecedent malady.The causes which contribute to increase the liability of the nervous system to suffer from the effects of infectious disease may be divided into two classes:1 Those which increase the liability to invasion of the body by pathogenic organisms;2Those which lower the resistance of the nervous system.Of the latter class are hereditary weaknesses in special Oakley Sunglasses directions, the presence of other poisons in the nervous system, the effects of trauma, a poorly acting vaso-motor system.Debility of the nervous system may contribute to increase the liability of the body to invasion by impairing the vitality of the tissues which should resist the germs of disease, besides impairing the efficiency of the vaso-motor reaction.The most important lines of research for the future are in the direction of classifying the special liabilities on the part of the nervous system to disease independently of infectious causes, the refinement of our methods of histological research, the more widespread and thorough study of bacteriology and of the means of determining the toxic condition of the blood and urine.RELATION OF INFECTIOUS PROCESSES TO MENTAL DISEASE,by CHARLESK. MILLS,M.D., of Philadelphia.Nearly The North Face Outlet a century ago, Rush declared that certain causes as gout, dropsy, consumption, pregnancy, and fevers of North Face Outlet Store all kinds produced madness by acting on the brain in common with the whole