. A compend of human physiology; especially adapted for the use of medical students. Physiology. SPINAL CORD. 177. Fig. 22.—Diagram showing the Course, through the Spinal Cord, of the Motor and Sensory Nerve-fibers. B and B' represent the right and left hemispheres of the brain, from which the motor fibers take their origin, and in which the sensory fibers terminate. The viotor tract from the right side, i, passes down through the crus, through the pons to the medulla oblongata, where it divides into two portions : (i) The larger portion, ninety-seven per cent., crosses over to the opposite si
. A compend of human physiology; especially adapted for the use of medical students. Physiology. SPINAL CORD. 177. Fig. 22.—Diagram showing the Course, through the Spinal Cord, of the Motor and Sensory Nerve-fibers. B and B' represent the right and left hemispheres of the brain, from which the motor fibers take their origin, and in which the sensory fibers terminate. The viotor tract from the right side, i, passes down through the crus, through the pons to the medulla oblongata, where it divides into two portions : (i) The larger portion, ninety-seven per cent., crosses over to the opposite side of the cord and passes down through the lateral column. It gives off fibers at different levels, which pass into the gray matter and become connected with the muscles, M, through the multipolar cells. (2) The smaller portion, three per cent., does not cross over, but descends on the same side of the cord in the anterior column and supplies the muscles, m. The same is true for the motor tract for the left hemisphere. The sensory fibers from the left side of the body enter the gray matter through the pos- terior roots. They then cross over at once to the opposite side of the cord and ascend to the hemisphere, partly in the gray matter, partly in the posterior column. The same is true for the sensory nerves of the right side of the 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 Brubaker, Albert P. (Albert Philson), 1852-1943. Philadelphia, Blakiston
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