An introduction to pathology and morbid anatomy / by T. Henry Green.

  • Green, T. Henry (Thomas Henry), 1841-1923
Date:
1900
Catalogue details

Licence: In copyright

Credit: An introduction to pathology and morbid anatomy / by T. Henry Green. Source: Wellcome Collection.

Provider: This material has been provided by The University of Leeds Library. The original may be consulted at The University of Leeds Library.

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    ulcer and similar trophic disturbances, extensive degeneration of tlie nerves has been observed. The degeneration of the nerves is more marked at the periphery, and the nearer centrally the nerve is examined the fewer degenerated fibres are there found. Slight chanoes in the cerebral cortex have been described, corresponding to those of general paralysis, but less in degree. The Nature of the Degeneration.—Microscopical examination of the spinal cord shows the myelin-sheath of the nerve fibres dimin- ished or destroyed; the axis-cylinder-process may be swollen in one place, attenuated in another, and generally irregular in thickness or : — — ■ ■ ■ ■ - ■ ry- --/r^r-^'tt^ Fig. —Photomicrograph of Section of Anterior and Posterior Root close to the Ganglion, showing the small anterior root with mediil- lated fibres normal, and the sclerosed posterior root much larger in size, but almost denuded of medullated fibres ; there ii, however, a great overgrowth of fibrous tissue around and between the con- stituent bundles. x 30. completely atrophied; the neuroglia is increased at the expense of the parenchyma, and there are a large number of Deiter's cells visible Nearly the whole of the posterior columns in the lumbo-sacral region may be destroyed, leaving only the cornu-commissural and oval areas of endogenous fibres. The vessels are often thickened in the sclerosed area, and not elsewhere ; this change is secondary to the degeneration and not cau.sa]. The walls of the arteries are often thickened, and there is hyaline degeneration of the media; sometimes the vessels are so much thickened by this degenerative process as to become