Nervous and mental diseases . f the posterior cord tractsbecause of the anatomical absence of the neurilemma at the pointwhere the sensory root fibers enter the cord. They find this to be theinitial point for the degenerative process. Morbid Anatomy.—In this section it is purposed to take up themorbid anatomy of the nervous apparatus in tabes dorsalis. The morbidanatomy of the trophic lesions in the bones, joints, and soft structureswill be described respectively with their clinical features. As the diseaseis essentially marked by ascending degenerations, it is well to commenceat the periphery
Nervous and mental diseases . f the posterior cord tractsbecause of the anatomical absence of the neurilemma at the pointwhere the sensory root fibers enter the cord. They find this to be theinitial point for the degenerative process. Morbid Anatomy.—In this section it is purposed to take up themorbid anatomy of the nervous apparatus in tabes dorsalis. The morbidanatomy of the trophic lesions in the bones, joints, and soft structureswill be described respectively with their clinical features. As the diseaseis essentially marked by ascending degenerations, it is well to commenceat the periphery. 1 Brain, Winter, 1904. DISEASES OF THE WHITE 3IATTEB OF THE COED. 417 The spinal nerves are usually fouud to present a degeneration whichis greatest at the periphery and most marked in, if not entirely confinedto, the sensory fibers for the skin, muscles, and joints. The trophiccenters for these fibers are in the posterior root-ganglion in part, but itseems probable that there are also superficial peripheral trophic cells. Fig. 180.—Sections of the cord in an early cas region [Marie). Lumbar region ; 2, dorsal region; 3, cervical for at least a few of them. The muscle spindles which undoubtedlyhave a sensory function are constantly found degenerated. By somewriters these nerve-changes are denominated a neuritis, but histologicallythe changes conform to a Wallerian degeneration. The spinal m rue-rooU
Size: 2015px × 1240px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., booka, bookcentury1900, bookdecade1900, bookidnervousmentald00chu
