A treatise on orthopedic surgery . ectedtoward the convexity of the curve (Fig. 100). In the vertebrse,included in the compensatory curvature, the deformities arereversed, and the intermediate segments show the transitionalchanges between the two extremes. The intervertebral disksbecome wedge-shaped also, and atrophied on the shortened side,the changes in these softer tissues preceding, undoubtedly, thosein the bones. The articulations of the vertebrae become changedin shape and position in the general adaptation to the deformityand the ligaments are shortened or lengthened according to theirr
A treatise on orthopedic surgery . ectedtoward the convexity of the curve (Fig. 100). In the vertebrse,included in the compensatory curvature, the deformities arereversed, and the intermediate segments show the transitionalchanges between the two extremes. The intervertebral disksbecome wedge-shaped also, and atrophied on the shortened side,the changes in these softer tissues preceding, undoubtedly, thosein the bones. The articulations of the vertebrae become changedin shape and position in the general adaptation to the deformityand the ligaments are shortened or lengthened according to theirrelation to the distortion. On section the internal structure of the vertebrae shows thesame adaptive changes that are evident on the exterior. In thenarrowed parts of the bones that bear the weight the tissue is 158 OBTEOPEDIC SUBGEBY. ^ thick and compact, on the opposite side it is attenuated andatrophied. The mobility of the spine is lessened by these changes in itsshape and structure, primarily by the distortion, secondarily by. )l0i^* > the shortening of the tissues on the concave side, by the irregu-larities of the vertebral bodies, by the interference of the newlyformed or transformed bone which is thrown out about themargins of the vertebrse and the articular processes, and by LATERAL CUBVATUEE OF THE SPINE. 159 ossification of the periosteum and ligamentous coverings of theadjacent bones. Thus, in fixed deformity there may be, at thepoints of greatest distortion, practical anchylosis. The musclesof the back, both intrinsic and extrinsic, undergo adaptativechanges, and, as a rule, they are relatively weak. The most important of the secondary deformities of lateralcurvature is that of the thorax. This is somewhat difficult to
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Keywords: ., bookauthorwhitmanr, bookcentury1900, bookdecade1910, bookyear1910
