A manual of diseases of the nervous system . ree hours after death, into rows of fine granules. This arrangement provides amechanism by which the nerve-cells may conduct and diffuse impulses, but such amechanism does not exclude (as has been assumed) the reinforcement or originationof such impulses, and their discovery leaves untouched the facts which demonstratethe trophic iuflmnce of the cells, and the manner in which they arrest secondarydegeneration. These functions are indicated by facts of a totally different observations (by a new method) are of great importance, and ap
A manual of diseases of the nervous system . ree hours after death, into rows of fine granules. This arrangement provides amechanism by which the nerve-cells may conduct and diffuse impulses, but such amechanism does not exclude (as has been assumed) the reinforcement or originationof such impulses, and their discovery leaves untouched the facts which demonstratethe trophic iuflmnce of the cells, and the manner in which they arrest secondarydegeneration. These functions are indicated by facts of a totally different observations (by a new method) are of great importance, and appeartrustworthy. 168 SPINAL COED. often blended, so that the anterior group cannot be separately distin-guished, as in the right-hand mid-cervical figure. A fourth group,usually the largest, lies in the outermost part of the horn, behind itsfront, usually in the posterior outer angle; it may extend inwards,halfway across the horn. It is called the external or postero-lateralgroup (, Fig. Q9). These three are the most important Upoer Dorda) Lumbal Mid-Lutnbar. Fig. &9.—Diagrams of the groups of nerve-cells in the anterior cornn. Groups:—I., inner or medial; A., anterior; , antero-lateral; , postero-lateral; ,intermediate lateral process; p. v. c, posterior vesicular column or tract. The twomid-cervical sections are only a few millimetres apart, and show how the anteriorgroup, separate in the one, may be blended with the antero-lateral group in aneighbouring part of the cord. There is in some parts also a central group, occupying nearly the centreof the horn. In the small cornu of the dorsal region, often no well-defined groups can be made out, but when any can be recognised, theyare generally the anterior and external. Similar cells, usually smaller in size, and isolated, are scatteredthrough the intermediate grey matter, and a group of cells occupies aprojection outwards into the lateral column in the lower cervical andupper dorsal regi
Size: 1842px × 1357px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectnervoussystem, bookye
