. A text-book of medicine for students and practitioners . otor nerve, m, withits corresponding muscles {neuroticmuscular atrophy), and, finally, wemay also place here by far thecommonest form of disease, progress-ive muscular dystrophy—that is,that disease in which only the ter-minal apparatus of the whole tract,the muscle itself, undergoes a pro-gressive atrophy. The forms of disease just men-tioned are essentially, so far as theyare endogenous diseases, all closelyallied, but it is still necessary for atime to keep them separate, at least so far as they show very definite marks ofdistinctio
. A text-book of medicine for students and practitioners . otor nerve, m, withits corresponding muscles {neuroticmuscular atrophy), and, finally, wemay also place here by far thecommonest form of disease, progress-ive muscular dystrophy—that is,that disease in which only the ter-minal apparatus of the whole tract,the muscle itself, undergoes a pro-gressive atrophy. The forms of disease just men-tioned are essentially, so far as theyare endogenous diseases, all closelyallied, but it is still necessary for atime to keep them separate, at least so far as they show very definite marks ofdistinction, both clinically and anatomically. Only with a more advancedknowledge of the special nature of all these morbid conditions can we make astrict aetiological division of them. At present we must remember that we can-not consider the different clinical and anatomical forms as different diseases,strictly separate from one another. The more our knowledge increases, themore prominent seem to be transitions and connecting links between the dif-ferent Fi»s. 168.—Diagram of the motor tract. cell in the cortex. PyS. Py-ramidal lateral tract. V. Ganglion cell of theanterior horn. m. Motor nerve. M. Mus-cular fiber. 2. AMYOTROPHIC LATERAL SCLEROSIS jEtiology and Pathological Anatomy.—For the first accurate knowledgeof amyotrophic lateral sclerosis we must thank Charcot, who published in PRIMARY DEGENERATIONS OF THE MOTOR TRACT 369
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