File:Nervous and mental diseases (1919) (14595193037).jpg

Identifier: nervousmentaldis00chu (find matches)
Title: Nervous and mental diseases
Year: 1919 (1910s)
Authors: Church, Archibald, b. 1861 Peterson, Frederick, 1859-1938, joint author
Subjects: Nervous system Mental illness
Publisher: Philadelphia, London, W.B. Saunders company
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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nenlargement of the medullary canal. Microscopically, the Haversiancanals are dilated and some decalcification is evident. The osteoblasts 1 Deutsch. Zeit. f. Nervenheilk., 1895. ^ Berlin, klin. Woch., Jan. 25, 1904. 3 Berlin, med. Woch., Jun. 26, 1899. * Berlin, klin. Woch., 1902. DISEASES OF THE WHITE MATTER OF THE CORD. 451 are shrunken and sometimes show fatty degeneration, while the medul-lary substance is increased to an amount corresponding to the diminishedosteal portion. This results in an inversion of the ordinary ratiobetween the organic and inorganic elements. Xormal bones are abouttwo-thirds inorganic substance; tabetic bones are about tico-tkirdsorganic matter. In other words, these bones present a rarefying osteitis.By some this is attributed to changes in the nutrient artery and nerve,which have been found sclerotic and neuritic. For others tlie lesion isa manifestation of the trophic disturbance arising from modification oftrophic cells in the spinal ganglia and cord.
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Fig. 192.—Spontaneous fractures and arthropathic disintegrations (Charcot). Tabetic Arthropathy.—One of the early features of tabes is anabnormal range of joint-motion. This may be observed even in the pre-ataxic stage, but is usually developed after incoordination has appeared.Putnam ^ was among the first to call attention to the fact that the jointsin tabetics could be forced into extreme flexion or extension withoutproducing much or any pain, and attributed the fact to analgesia.Frankel and Faure,^ in a fuller study of the matter, show the extreme1 Bost. M. and S. Jour., Aug. 29,1895. ^ Nouv. Icon, de la Salpet., July, 1896. 452 DISEASES OF THE CORD PROPER. range of motion that is customarily found in the joints in this disease.They found that in locomotor ataxics the foot, wrist, elbows, and fingersare similarly affected. Their patients could execute at the first attemptthe split attitude that acrobats only attain by years of practice.(See Figs. 188, 189, 190.) They attribute

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