. Contributions from the Department of Neurology and the Laboratory of Neuropathology (reprints). ourbillons in the posteriorcolumns. The sclerosis is much more intense in the ventral twothirds of Coils columns. Some slight indication of the tour-billons is found in the crossed pyramidal tracts. The sclerosisis much more dense in the coluinns of Goll than elsewhere. Thevessels of the posterior roots in the cervical and lumbar regionsare much congested. The posterior columns stained by the Biel-schowsky method show a fairly large number of axis cylinders;these are short and are cut longitudinal
. Contributions from the Department of Neurology and the Laboratory of Neuropathology (reprints). ourbillons in the posteriorcolumns. The sclerosis is much more intense in the ventral twothirds of Coils columns. Some slight indication of the tour-billons is found in the crossed pyramidal tracts. The sclerosisis much more dense in the coluinns of Goll than elsewhere. Thevessels of the posterior roots in the cervical and lumbar regionsare much congested. The posterior columns stained by the Biel-schowsky method show a fairly large number of axis cylinders;these are short and are cut longitudinally in tranverse sectionsbecauseof the distortion of the fibers in the tourbillons. Theseaxis-cylinders are more numerous in more anterior portions ofGolls columns than they are in the extreme posterior part. The right and left paracentral lobules stain well by the Wei-gert method. The nerve cells do not appear so large as normal,and possibly are not quite so numerous. No large Betz cells arefound, although a few cells of the Betz type but sinaller thanthese are present. FRIEDREICHS ATAXIA 417. Fig. 5. Longitudinal section from a case of Friedreichs ataxia (CaseI), taken from the low thoracic region and stained by the Bielschowskymethod. Whereas in the posterior part of the cohimns the axis cylindersare seen arranged longitudinally, here in the anterior part of the columnsof Goll the axis cylinders run in all directions. Compare with Fig. 6. 4i8 WILLIAM G. SPILLER The cells of Purkinje in the cereliellum by thionin are numer-ous and well stained, and in sections made by the Weigertmedullary method they appear normal. The nucleus dentatuscontains comparatively few cells, and most of those present areshriveled. The superior cerebellar peduncles are smaller thanusual.
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