Lateral curvature of the spine and round shoulders . Fig. 81.—Hysterical Scoliosis. Fig. 82.—Right Dorsal Curve Due toLeft Empyema. (g) Organic heart disease, especially in children, is a competentcause of lateral curvature (Fig. 84). 5. HABIT OR OCCUPATION That the continued maintenance of an asymmetrical portion of thespine through the period of growth may result in some degree ofbony deformity of the growing spine is a self-evident proposition,dependent on the fact that growing bone is plastic and follows theline of least resistance. But that such conditions are likely to result no ETIOLOGY
Lateral curvature of the spine and round shoulders . Fig. 81.—Hysterical Scoliosis. Fig. 82.—Right Dorsal Curve Due toLeft Empyema. (g) Organic heart disease, especially in children, is a competentcause of lateral curvature (Fig. 84). 5. HABIT OR OCCUPATION That the continued maintenance of an asymmetrical portion of thespine through the period of growth may result in some degree ofbony deformity of the growing spine is a self-evident proposition,dependent on the fact that growing bone is plastic and follows theline of least resistance. But that such conditions are likely to result no ETIOLOGY in moderate or severe scoliosis in normal children is not, in the opinionof the writer, likely. That they may result in false scoHosis orslight scoliosis is apparently reasonable to Fig. 83.—^ScoLiosis Due to ExtensiveBurn of Left Chest Received at theAge of 17. Patient now 19 Years Old. Fig. 84.—Severe Scoliosis Associatedwith Organic Heart Disease. DeathOccurred from the Latter. The commonest causes of occupation scoliosis are to be foundin children in the assumption of faulty attitudes at school and athome, violin playing, the use of a side saddle in horseback riding,carrying heavy weights asymmetrically, etc. The relation of scoliosis to school life has been much discussed andwill be considered by itself. CHAPTER IXOCCURRENCE Scoliosis in Quadrupeds.^—Scoliosis in animals other than manhas been observed, but is rare. Eighteen cases were found in litera-ture by Hartel in 1909. Ten of these were foetal malformationsfound in new-born horses, goats, deer, and calves; curves due torickets were found in pigs, and in cattle an inflammation and growingtogether of vertebrae or parts of vertebrae. Further are to be addedscoliosis in a colt one and one-half years
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