File:Nervous and mental diseases (1908) (14778210815).jpg

Identifier: nervousmentald00chu (find matches)
Title: Nervous and mental diseases
Year: 1908 (1900s)
Authors: Church, Archibald, b. 1861 Peterson, Frederick, 1859-1938
Subjects:
Publisher: Philadelphia : Saunders
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

View Book Page: Book Viewer
About This Book: Catalog Entry
View All Images: All Images From Book
Click here to view book online to see this illustration in context in a browseable online version of this book.

Text Appearing Before Image:
sions of theanterior cornua are generally most pronounced above the dorsal region,but the involvement of the crossed pyramidal tracts extends to the lowestcord-levels. Similar changes may be traced through the medulla, bothin the gray matter below the fourth ventricle and in the pyramidaltracts above the decussations. These latter may mount through thepeduncles and internal capsules to the pyramidal-cell layers of the cortex,and there a cellular degeneration, identical with that in the spinal gray,may occasionally be encountered. The muscles are pale and fatty, and under the microscope presentvarious changes. The fibers may be narrowed, with stria? poorlymarked or less frequent than in health, or more frequent and deeplymarked, showing a tendency to fissuration. The striation may entirelydisappear in fatty granulations, and distinct globules or the empty sar-colemma sheaths may alone remain. Longitudinal striation sometimesdevelops, and the transverse markings may later disappear. The
Text Appearing After Image:
Fig. 155.—Cord-sections in a case of amyotrophic lateral sclerosis. 1, Lumbar region ; 2, dorsal region; 3, cervical region (Marie). nerve-trunks often contain degenerated fibers, which can be tracedthrough the anterior spinal roots to the anterior horns. All these cen-tral and peripheral changes vary in degree in different cases, and inter-mediate instances are becoming more and more frequently noted inwhich the muscles or the nerve-endings or the anterior cornual cellsshow preponderating changes. Only the most approved technic canbe relied upon to determine minor abnormalities. 398 DISEASES OF THE CORD PROPER. Symptoms.—The various types of spinal muscular atrophies andthe confusion that has arisen over them, as well as the symptoms invarious cases, are referable to the vertical extent of the lesions andthe varying intensity of the process at different levels. It must atonce be evident that if the degeneration falls first on the lower neuron,flaccid, atonic, atrophic paralysis w

Note About Images