. Atlas and epitome of traumatic . ch encroachedon the spinal canal and pressed upon the cord. (Authors observa-tion.) vertebrae and are produced by excessive flexion or exten-sion, by compression, or by a dislocating force—usually bya combination of all these factors. The accident is alwaysproduced by an overwhelming force, such as a fall on theback, the head, the buttocks, or the feet, or a cave-in, some cases it occurs while the vertebral column asa whole is fixed by the action of the muscles. Indirectfractures of the vertebrae by compression are compara-tively frequent among coal-mi
. Atlas and epitome of traumatic . ch encroachedon the spinal canal and pressed upon the cord. (Authors observa-tion.) vertebrae and are produced by excessive flexion or exten-sion, by compression, or by a dislocating force—usually bya combination of all these factors. The accident is alwaysproduced by an overwhelming force, such as a fall on theback, the head, the buttocks, or the feet, or a cave-in, some cases it occurs while the vertebral column asa whole is fixed by the action of the muscles. Indirectfractures of the vertebrae by compression are compara-tively frequent among coal-miners. The injury is usuallyproduced while the miner is bent over in a sitting posture,with the buttocks resting on the heels, by a mass of stonesor coal falling on his head and neck from an inconsiderableheight. Thus he is gradually bent over forward and com-pressed, excessive forward flexion of the vertebral columntakes place until the head comes in contact with the knees,and a fracture is produced. Tab. 18. | m^r* ,m: 0fe\ I *.
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