Diseases of the nervous system .. . condary degeneration in the brain is exceedingly difficult tounderstand. Much study has been expended upon it, and some remarkablefacts have come to light which have been utilized in histology and the conditions are still too obscure and too complicated to be accuratelydescril)ed. The pyramidal tract has been more thoroughly investigated thanothers. Here I shall merely present a diagrammatic figure (Fig. 121). H. SYPHILIS OF THE NERVOUS SYSTEM Many diseases of the central nervous system are attributed to some of these affections, fo
Diseases of the nervous system .. . condary degeneration in the brain is exceedingly difficult tounderstand. Much study has been expended upon it, and some remarkablefacts have come to light which have been utilized in histology and the conditions are still too obscure and too complicated to be accuratelydescril)ed. The pyramidal tract has been more thoroughly investigated thanothers. Here I shall merely present a diagrammatic figure (Fig. 121). H. SYPHILIS OF THE NERVOUS SYSTEM Many diseases of the central nervous system are attributed to some of these affections, for example, in progressive paralysis, a causalconnection can only be determined by statistics, while changes of a syphiliticnature are never revealed in the histologic picture. It is well known thattabes shows histologically the changes already indicated; no signs pointingto syphilitic change have ever been determined. There are, however, many nervous diseases in which the syphilitic cause 126 HISTOLOGY OF THE CENTRAL NERVOUS SYSTEM.
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