Nervous and mental diseases . the cases probably originate in spinal hemorrhage occurring at 300 cases have been reported and many more have been observed. Etiology.—Men are much more frequently affected by this diseasethan women, and especially men exposed to hard labor. Verhagen andVandervelde report several instances of syringomyelia in the same family, LESIOXS AND DISEASES OF SPINAL GRAY. 387 but a neuropathic heredity is rare. Adult years furnish nearly all thereported cases, but it has been observed well developed at nineteen byLangdon, of Cincinnati, by the autho
Nervous and mental diseases . the cases probably originate in spinal hemorrhage occurring at 300 cases have been reported and many more have been observed. Etiology.—Men are much more frequently affected by this diseasethan women, and especially men exposed to hard labor. Verhagen andVandervelde report several instances of syringomyelia in the same family, LESIOXS AND DISEASES OF SPINAL GRAY. 387 but a neuropathic heredity is rare. Adult years furnish nearly all thereported cases, but it has been observed well developed at nineteen byLangdon, of Cincinnati, by the author at sixteen, and by Ballard andThomas at Cold, rheumatism, exposure to bad weather, trau-matism, overwork, the acute infectious fevers, and syphilis,2 have beenreported as possibly causative in various cases, but this relation, in thegliomatous form, at least, is entirely conjectural. Morbid Anatomy.—The syringomyelic cord in marked cases showsnotable changes of conformation that correspond to its tubular condi-. Fig. 144.—Sections of a syringomyelic cord. 1, Lower lumbar region ; 2, uj>j er lumbar region-3, midcervical region (Bruhl).
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