. A manual of diseases of the nervous system. or three rows of nuclei may lie between the fibres. The capil-laries may be dilated and distended. It is very common to seemuscular fibres that are much altered side by side with others thatpresent a nearly normal appearance. Ultimately the sheaths becomeempty and shrink, and may be scarcely distinguishable from theinterstitial fibrous tissue. The peripheral nerves contein many degenerated nerve-fibres, andVOL. I. 35 546 SPINAL COED. the terminal brandies for tlie muscles a still larger number. If thenerves are traced up to tbe cord it is found tha
. A manual of diseases of the nervous system. or three rows of nuclei may lie between the fibres. The capil-laries may be dilated and distended. It is very common to seemuscular fibres that are much altered side by side with others thatpresent a nearly normal appearance. Ultimately the sheaths becomeempty and shrink, and may be scarcely distinguishable from theinterstitial fibrous tissue. The peripheral nerves contein many degenerated nerve-fibres, andVOL. I. 35 546 SPINAL COED. the terminal brandies for tlie muscles a still larger number. If thenerves are traced up to tbe cord it is found that the degenerated fibrescome only from the anterior roots. These are conspicuously changedto the naked eye, small and grey. They may resemble fine threads ofconnective tissue, and under the microscope no nerve-fibres may befound in them, or only a few may remain of normal aspect, the restbeing in various stages of degeneration, or represented only by theiremx^ty sheaths. The degree of affection of the anterior roots corre- FiG. 147. Fm. Fii>. U9,
Size: 1373px × 1821px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectnervoussystemdisease
