Nervous and mental diseases . OF THE GENERAL NERVOUS SYSTEM. heredity, but this element is chiefly manifest in a neuropathic , Oppenheim, and Duchenne have cited examples of direct succes-sion, and it has, in a small number of instances, affected several childrenof the same family. Hervouet has even seen nine cases in one gen-eration. Overwork, cold, traumatism, and various excesses have beenaccused as causative. Such relation is subject to doubt, though allthese influences are capable of aggravating the disease when once estab-lished and of precipitating additional manifestations


Nervous and mental diseases . OF THE GENERAL NERVOUS SYSTEM. heredity, but this element is chiefly manifest in a neuropathic , Oppenheim, and Duchenne have cited examples of direct succes-sion, and it has, in a small number of instances, affected several childrenof the same family. Hervouet has even seen nine cases in one gen-eration. Overwork, cold, traumatism, and various excesses have beenaccused as causative. Such relation is subject to doubt, though allthese influences are capable of aggravating the disease when once estab-lished and of precipitating additional manifestations of its ,1 for instance, in a study of 100 cases, attributed the cause totrauma in 13, but in one-half of the cases no alleged cause could bementioned. The most important etiological factors are the , pneumonia, malaria, measles, scarlet fever, small-pox, diph-theria, whooping-cough, erysipelas, dysentery, cholera, influenza, andthe puerperium have been followed by the development of the symp-.


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