. The anatomy of the central nervous system of man and of vertebrates in general. Neuroanatomy; Central Nervous System. CHAPTER XXI. The Peeipheeal-ISTerve Eoots, the Spinal Ganglia, and the Spinal Coed. The peripheral nerves, as is well known, contain both motor and sen- sory fibers. Kear to the spinal cord these separate from each other. The motor division enters the cord directly as the anterior root. The sensory fibers enter the spinal ganglion. In the spinal ganglia there are large cells, which sometimes give off two processes, but usually only one. If there is but one, it divides soon af
. The anatomy of the central nervous system of man and of vertebrates in general. Neuroanatomy; Central Nervous System. CHAPTER XXI. The Peeipheeal-ISTerve Eoots, the Spinal Ganglia, and the Spinal Coed. The peripheral nerves, as is well known, contain both motor and sen- sory fibers. Kear to the spinal cord these separate from each other. The motor division enters the cord directly as the anterior root. The sensory fibers enter the spinal ganglion. In the spinal ganglia there are large cells, which sometimes give off two processes, but usually only one. If there is but one, it divides soon after. Fig. 213.—Scheme of the relationships between the spinal cord and the nerve-roots. Vordet'e Wurzel, Anterior root. Hint. Wurzel, Posterior root. Mot. Theil, Motor portion. Sens. Theil, Sensory portion. Gemischter Nerv., Mixed nerve. leaving the cell-body into two; so that, in the end, it amounts to practically two cell-processes. It will be remembered that, according to the observations of His, the sensory nerves grow out from these cells as peripheral processes, but that these cells also send one process into the spinal cord, a bundle of such proc- esses constituting the posterior root. Since, according to actual count, the posterior roots contain approxi- mately the same number of fibers in the adult as the nerves just beyond the ganglia, it would seem that there were simply an interposition of a cell in the course of every such fiber. (332). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Edinger, Ludwig, 1855-1918; Hall, Winfield Scott, b. 1861; Holland, Philo Leon; Carlton, Edward P. Philadelphia : F. A. Davis Co.
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