Diseases of the nervous system : a text-book of neurology and psychiatry . associated withprogressive muscular wasting, and indicate a field for experimentaltherapeutics. Parathyroid myatonias, myasthenias, family periodicparalyses, etc., offer a suggestion in this line of a perverted parathyroidactivity that may be seized upon for the study of the mineralmetabolism, especially of calcium. Personal cases treated along linessuggested by the mineral metabolism of the body offer a glimmer ofhope in a hitherto hopeless disease. Syphilitic cases need specifictherapy. FRACTURE AND DISLOCATION SYNDRO
Diseases of the nervous system : a text-book of neurology and psychiatry . associated withprogressive muscular wasting, and indicate a field for experimentaltherapeutics. Parathyroid myatonias, myasthenias, family periodicparalyses, etc., offer a suggestion in this line of a perverted parathyroidactivity that may be seized upon for the study of the mineralmetabolism, especially of calcium. Personal cases treated along linessuggested by the mineral metabolism of the body offer a glimmer ofhope in a hitherto hopeless disease. Syphilitic cases need specifictherapy. FRACTURE AND DISLOCATION SYNDROMES HI FRACTURE AND DISLOCATION SYNDROMES. Spinal cord injuries result from bullets, penetrating instruments,or from blows or falls. Bullets and cutting instruments cause hemorrhage, with, as a rule,partial or complete severance of the cord, with septic infections of thecord and meninges. Blows and hard falls occasion fractures or disloca-tions, with crushing of the cord to a greater or lesser degree. Mildinjuries may result merely in the bruising of the cord, or minute. Fig. 175.—Total cross-section of spinal cord at the level of d showing the resultsupon the long fiber tracts. Middle section indicates level of injury. Cross-hatchingabove and below indicate the degenerations or loss of function. (Veraguth.) hemorrhages within the cord or of the pial or dural spaces only maybe produced, sometimes even from excessive exertion, long marching,severe athletic exercises, sudden spinal torsions, etc. Dislocationof a vertebra practically always causes a crushing of the cord; theso-called dislocations without spinal cord injury are more apt to bewrenches of the vertebrae or very limited dislocations. Fracturesmay result with but few spinal symptoms; crushing of the cord causesmore or less disintegration, usually accompanied by severe hemorrhageswithin or without the cord substances (hematomyelia, dural hemor-rhage). Hematomyelia usually extend up and down the cord from 342 LESIONS OF
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