Identifier: treatiseonorth00whit (find matches)
Title: A treatise on orthopedic surgery
Year: 1903 (1900s)
Authors: Whitman, Royal, 1857-
Subjects:
Publisher: Philadelphia and New York, Lea brothers & co.
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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Scoliosis with extreme lateral deviation. inferior margins at the narrow .side overhang the centre of thebody, increasing its lateral concavity (Fig. 88). Similar accom-modative changes, although less marked, are t be found in tli<articular processes and in the laminae; in fart, all the parte <-iithe concave side are broadened, shortened, and Lessened in verticaldiameter as compared with those on the convex -i<l<- of the -pin-.These changes affect the shape of the neural canal, which^becomes 158 ORTHOPEDIC SURGERY. somewhal ovoid in outline, the base being directed toward theconvexity of the curve (Fig. 89). In the vertebrae, included inthe compensatory curvature, the deformities are reversed, andthe intermediate segments show the transitional changes between N
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u tin- two extremes. The intervertebral disks become wedge-shapedalso, and atrophied on the side subjected to greatest pressure, thechanges in these Bofter tissues preceding, undoubtedly, those in LATERAL CURVATURE OF THE SPIXE. 159 the bones. The articulations of the vertebra? become changed inshape 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 vertebra? shows thesame adaptive changes that are evident on the exterior. In thenarrowed parts of the bones that bear the weight the tissue isthick and compact, and 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, later by the Fig. 88.

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