Principles and practice of spinal adjustment; for the use of students and practitioners . ard on the superior articular processes of thevertebra below, and as they do so, force the latter forwardinto the intervertebral foramina on each side. The degreeof closure of the foramina will of necessity depend upon theextent of thinning of the disc, and will be extreme if theentire thickness of the disc has been destroyed. If completedestruction takes place so that the bodies of the two verte-brae are in direct apposition, ankylosis will develop as it VERTEBRAL SUBLUXATIONS 267 would in any joint in t
Principles and practice of spinal adjustment; for the use of students and practitioners . ard on the superior articular processes of thevertebra below, and as they do so, force the latter forwardinto the intervertebral foramina on each side. The degreeof closure of the foramina will of necessity depend upon theextent of thinning of the disc, and will be extreme if theentire thickness of the disc has been destroyed. If completedestruction takes place so that the bodies of the two verte-brae are in direct apposition, ankylosis will develop as it VERTEBRAL SUBLUXATIONS 267 would in any joint in the body. Before this takes place, how-ever, nature produces a forward bending of the spine in theaffected region to prevent complete occlusion of the inter-vertebral foramina, just as occurs in old age when settlingof the spine commences, and which is a counterpart of acompression subluxation, except that all the vertebrae areaffected in the settling incident to old age. Compression subluxations are met with in all regions ofthe spinal column. They are least noticeable in the cervical. Fig. Subluxation. region, for the reason that here the intervertebral discs arenormally not very thick; in the lumbar region they are mostpronounced since here the di-scs are very thick in comparisonto those of the other regions. Fig. 45. Supero-Inferior Subluxation.—This form of subluxationis a counterpart of the scoliotic subluxation, with this excep-tion, namely, that in scoliosis a group of vertebrae are in-volved, while in a supero-inferior subluxation only onevertebra is affected. That is to say, in scoliosis several discs 268 SPINAL ADJUSTMENT are compressed laterally, whereas in a siipero-inferiorsubluxation only one disc is so compressed. As a result of the thinning of one of the discs at itslateral aspect, the vertebra which rests upon that disc ap-proaches its fellow on that side, bringing the transverseprocesses close to each other; on the other side the discretains i
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