. A manual of diseases of the nervous system. that we arejustified in regarding the interference with function as an effect ofthe inflammation. Causes.—The morbid processes that may compress the cord arethose that involve an encroachment on, or occupy part of, the vertebralcanal. The chief are the following:—Disease of the bones of thespinal column, especially caries; growths in the spine; aneurismeroding the bones and then compressing the cord; growths in themembranes; thickening of the dura mater. These processes haveusually only a small vertical extent, and the pressure they exert rarelyext
. A manual of diseases of the nervous system. that we arejustified in regarding the interference with function as an effect ofthe inflammation. Causes.—The morbid processes that may compress the cord arethose that involve an encroachment on, or occupy part of, the vertebralcanal. The chief are the following:—Disease of the bones of thespinal column, especially caries; growths in the spine; aneurismeroding the bones and then compressing the cord; growths in themembranes; thickening of the dura mater. These processes haveusually only a small vertical extent, and the pressure they exert rarelyextends over more than a few inches. Pathological Anatomy.—The cord usually presents evidence ofthe compression it has endured in considerable narrowing at the spot,where it may be indented and flattened, or cyhndrical. Sometimesthe reduction in size is extreme; for an inch or so the cord may bereduced to one third of its normal diameter, and it has even beenfound no thicker than a crow-quill. An example of flattening is COMPRESSION. 89]. / C
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectnervoussystemdisease
