Abstract
CHANGES the body associated with age are receiving increasing attention in all branches of medical science. In view of the controlling influence which the nervous system exercises over all activities of the body, it seems highly important that the changes with age in this particular system should be given detailed consideration. Such consideration has been given to the brain, but the spinal cord, though scarcely less important, has not received a similar amount of attention. It was with this thought in mind that the present study was undertaken. MATERIAL The material for this investigation was selected from among the spinal cords which had been removed in the Section on Pathologic Anatomy of the Mayo Clinic. They were selected in such a manner that each decade of life was included. Spinal cords from 100 patients were studied. They were distributed among the various decades of life as follows: 10 from each

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