. A manual of diseases of the nervous system. rve their transverse striation, butwhere they are narrowest this may have in part disappeared, either bygranular degeneration, or, more commonly, by a simple fading of thestrisB. In the narrowed fibres the strise are sometimes farther apartthan normal. In other parts broad fibres may be seen, normal or VOL. I. 37 578 SPINAL COED. nearly normal in aspect (Fig. 166), coursing among tlie fat-cells, andaccompanied by a smaller amount of fibrous tissue. Fibres occasion-ally present fatty degeneration, a longitudinal striation or fissuring,vitreous (waxy
. A manual of diseases of the nervous system. rve their transverse striation, butwhere they are narrowest this may have in part disappeared, either bygranular degeneration, or, more commonly, by a simple fading of thestrisB. In the narrowed fibres the strise are sometimes farther apartthan normal. In other parts broad fibres may be seen, normal or VOL. I. 37 578 SPINAL COED. nearly normal in aspect (Fig. 166), coursing among tlie fat-cells, andaccompanied by a smaller amount of fibrous tissue. Fibres occasion-ally present fatty degeneration, a longitudinal striation or fissuring,vitreous (waxy) degeneration, or vacuolation, but tliese are empty sarcolemma sbeatlis may be seen where tlie narrowing ofthe fibres is greatest. In muscles that still preserve some red tintthe amount of fat is less, and there is often a relatively larger amountof interstitial fibrous tissue. Yery rarely, in some part of a musclethere has been only wasting of the fibres, without the interstitialchange, present elsewhere (Singer, in the triceps).. Fia. 166.—Gastroonemina muscle; two nearly normal muscular fibres,accompanied by fibrous tissue, surrouuded by fat-cells. In some of these the interstitial tissue may be almost entirelyfibrous, a few fat-cells only being visible here and there. In suchmuscles it is common to find the fibres more damaged than inthose in which the growth is partly fatty. It is chiefly in the latterthat many normal fibres are seen. Muscular fibres larger than normalare sometimes found after death. Such fibres have been seen in frag-ments removed during life by excision, or by a harpoon-trocar. Ithas been stated that the increased size was perhaps due to a vitalcontraction under the mechanical stimulus involved in the , however, the enlargement has been unquestionable (seenote, Muscular Hypertrophy). The motor nerves, when examined, have been found normal. The?condition of the sensory muscle-nerves (which terminate in theinterstitial tiss
Size: 1871px × 1335px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectnervoussystemdisease
