Principles and practice of spinal adjustment; for the use of students and practitioners . nts is occasioned by excessive impulses from a diseasedportion of the body, which reflexly produce excessive outgoingimpulses causing a contraction of the spinal ligaments ofthe segment at which the ingoing impulses entered. As willbe remembered, it was stated in the consideration of thereflex production of subluxations that the efferent impulse VERTEBRAL SUBLUXATIONS 269 of a reflex act affects principally the muscles of the sameside on which the afterent impulse entered the cord; conse-quently the spina
Principles and practice of spinal adjustment; for the use of students and practitioners . nts is occasioned by excessive impulses from a diseasedportion of the body, which reflexly produce excessive outgoingimpulses causing a contraction of the spinal ligaments ofthe segment at which the ingoing impulses entered. As willbe remembered, it was stated in the consideration of thereflex production of subluxations that the efferent impulse VERTEBRAL SUBLUXATIONS 269 of a reflex act affects principally the muscles of the sameside on which the afterent impulse entered the cord; conse-quently the spinal muscles and ligaments on one side willije contracted, which will compress the disc on that side; ifthis compression is carried beyond the limit of elasticity ofthe gfisc, a permanent thinning will be produced. ^his form of subluxation may also be a result of directtraumatism, and the fact that the spinous and transverseprocess on one side are out of alignment is positive evidencethat the centrum or body of the displaced vertebra is alsomoved downward on the compressed side. Fig. Fig. Subluxation. Lateral Subluxation.—A lateral subluxation is one inwhich a vertebra is displaced to either the right or left. Ina true lateral subluxation there is no twisting, turning, ortilting of the affected vertebra. There may, however, be anapparent lateral deviation of a vertebra. Such a conditionis produced by a unilateral contraction of the ligaments andmuscles of two vertebrae, which, by drawing the vertebratoward that side as a result of compression of the disc, wouldsimulate a direct lateral deviation of the vertebra a condition could, however, be differentiated from a 270 SPINAL ADJUSTMENT true lateral subluxation by the fact that in the former thetransverse processes approach each other, while in a truelateral subluxation the distance between the transverseprocesses on each side is the same. This form of displacement is met with most commonlyin
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