A treatise on nervous diseases; their symptoms and treatment . authorsconsider it as forming part of the other two membranes,while others regard it as a distinct membrane. The pia mater is closely adherent to the cord, andthrough it run the nutrient vessels for the cord. Itsends processes into the fissures of the cord; it sur-rounds the nerve-roots in their course from the cord tothe dura mater. From the pia mater, on each side,arises the ligamentum denticulatum, which keeps thespinal cord in the center of the spinal canal. It runsthe whole length of the cord, and stays it, by means oftwenty t
A treatise on nervous diseases; their symptoms and treatment . authorsconsider it as forming part of the other two membranes,while others regard it as a distinct membrane. The pia mater is closely adherent to the cord, andthrough it run the nutrient vessels for the cord. Itsends processes into the fissures of the cord; it sur-rounds the nerve-roots in their course from the cord tothe dura mater. From the pia mater, on each side,arises the ligamentum denticulatum, which keeps thespinal cord in the center of the spinal canal. It runsthe whole length of the cord, and stays it, by means oftwenty to twenty-three teeth-like processes, to the duramater. The space between the pia mater and dura mater isfilled with the cerebro-spinal fluid, which is containedin a very loose, wide-meshed connective tissue. The spinal cord is then suspended in the cerebro-spinal fluid by means of many processes of the piamater, by the nerve-roots, and the posterior septa. Thissuspension is so contrived that the influence of jarsand shocks may be reduced as much as B ^ Fig. 16.—Diagram illustrating the relations of the nerve-fiber tracts in the spinal section is supposed to be taken transversely through the lower part of thecervical enlargement (slightly modified from Flechsig by Hammond): A. Anterior Median Fissure. B. Posterior Median Fissure. C. Intermediate Fissure. D. Anterior Gray Cornu. E. Posterior Gray Cornu. F. Gray Commissure, with Central Canal. G. Uncrossed Pyramidal Tract (Flechsig), or Column of Turck. H. Fundamental Part of the Anterior Column (Anterior Koot-Zones of Charcot and his pupils). I. Anterior Part of Lateral Column. K. Crossed Pyramidal Tract of Lateral Column. L. Direct Tract from Lateral Column to Cerebellum. M. Column of Burdach, Posterior Root-Zones of Charcot and his pupils. N. Column of Goll. The posterior columns of descriptive anatomy include the fields M and N extending onthe surface from B to R. The antero-lateral columns extend on the
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectnervoussystem, bookye
