. Diseases of the nervous system . thusmedially forcing the preceding ones away from the zone of entrance. Thusit happens that the posterior roots which effected an ingress low down in thelumbar cord are found medially high up in the cervical cord, in Goils columnsFigs. 37, e, 38, 68, and 69) while those which entered high up are still inBurdachs column (Fig. 37, d). Hence Ave find that the posterior root fibersand the posterior lateral area, filled by the same, are together designated theentrance zone of the roots. The other, more lateral group of posterior root fibers (Figs. 67, 68, 69,V0,rp
. Diseases of the nervous system . thusmedially forcing the preceding ones away from the zone of entrance. Thusit happens that the posterior roots which effected an ingress low down in thelumbar cord are found medially high up in the cervical cord, in Goils columnsFigs. 37, e, 38, 68, and 69) while those which entered high up are still inBurdachs column (Fig. 37, d). Hence Ave find that the posterior root fibersand the posterior lateral area, filled by the same, are together designated theentrance zone of the roots. The other, more lateral group of posterior root fibers (Figs. 67, 68, 69,V0,rpe) which entered the posterior horn is composed of fibers having a two- 76 HISTOLOGY OF THE CENTRAL NERVOUS SYSTEM fold course. One group passes horizontally through the gray substance directlyto the large cells of the anterior horn (Figs. 69, 71). The other group, usually Fasciculus anterior propnus Fasciculus lateralisproprius Collaterals Ascending and descending branch of the sensory root fiber Spinal ganglionSensory root fiber. Fasciculus cerebello-spinalis — Tract fibers withcollaterals Central path from Clarkes column (passing upward in the direct lateral cerebellar tract) Fig. 69.—Diagrammatic Course of the First Sensory Neuron. (After Toldt.) thin fibers, divide at the apex of the posterior horn, or perhaps just within it,occasionally in front of the gelatinous substance, into an ascending and de-scending branch. The finest fibers, which separate as soon as they enter the
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectnervoussystem, bookye
