. Orthopaedic surgery for students and general practitioners : preliminary considerations and diseases of the spine : 114 original illustrations. Fig. 93. X-ray of an S-Shaped Scoliosis. Note the greater separation of ribs on the right, wedge-shaped bodies andintervertebral cartilages; also a wedge-shaped 6th lumbar vertebra. 196 ORTHOP-ffiDIC SURGERY. In the severest fixed cases a formative osteitis may anky-lose the articular processes of the vertebrae together. Thecapacity of that side of the thorax into which the convexityprojects is lessened as the bodies of the vertebrae encroachmore and
. Orthopaedic surgery for students and general practitioners : preliminary considerations and diseases of the spine : 114 original illustrations. Fig. 93. X-ray of an S-Shaped Scoliosis. Note the greater separation of ribs on the right, wedge-shaped bodies andintervertebral cartilages; also a wedge-shaped 6th lumbar vertebra. 196 ORTHOP-ffiDIC SURGERY. In the severest fixed cases a formative osteitis may anky-lose the articular processes of the vertebrae together. Thecapacity of that side of the thorax into which the convexityprojects is lessened as the bodies of the vertebrae encroachmore and more upon it and the ribs in front are flattenedand their angles decreased behind. On the other hand thediagonal diameter of the thorax from the ribs of the convexside forward is greater than normal and that of the other. Fig. 94. Case Shown in Fig. 88 Sighted Down the Back, Showing MarkedRotation Backward of Ribs on the Right Side. side less. (Fig. 92.) In very severe cases, the ribs on theconcave side may sink into the pelvis and change the shapeof its bones; this is especially true in cases where there ismarked inclination of the trunk to the opposite side. The muscles and ligaments as stated are only foundchanged in the severest cases; degeneration of the formeroccurs first on the concave side with adaptive shorteningof the ligaments. (Phelps.) NON-TUBERCULOUS DISEASES OP THE SPINE. 197 Prominence of the dorsal and lumbar muscles in scoliosishas been mistaken for abscess and incised or explored withan aspirator. Neither compression of the spinal nerves(owing to the large size of the foremina) nor are changes inthe spinal cord liable to occur in scoliosis. Berg was unableto detect any reaction of degeneration in the nerves supply-ing the extrinsic spinal muscles, i. e., the superficialgroup of back
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