. Lateral curvature of the spine and round shoulders . s may be produced. WuU-stein uses a large amount of force in his traction, applying up to 250pounds of pull, and he applies a plaster jacket while the patient is thusstretched and pushed into a corrected position. This jacket embraces,as must all such jackets to be wholly efficient, the chest, shoulders, andhead. The amount of force required, however, is excessive, as mustbe the case where force is not economically applied. He is attempt- Bos. Med. and Surg. Jour., May 11, 1893; Oct. 10, 1903. ^ Nebel: Zeitsch. f. orth. Chir., iv. ^Calot:
. Lateral curvature of the spine and round shoulders . s may be produced. WuU-stein uses a large amount of force in his traction, applying up to 250pounds of pull, and he applies a plaster jacket while the patient is thusstretched and pushed into a corrected position. This jacket embraces,as must all such jackets to be wholly efficient, the chest, shoulders, andhead. The amount of force required, however, is excessive, as mustbe the case where force is not economically applied. He is attempt- Bos. Med. and Surg. Jour., May 11, 1893; Oct. 10, 1903. ^ Nebel: Zeitsch. f. orth. Chir., iv. ^Calot: XII Internat. med. Kongress zu Moskau, 1897. ^ Redard: Trans. Amer. Orth. Assn., xi, 447. ^ Calot; France Med., 1896, 52; Schanz: Berl. klin. Wochens., 1902, 48 FORCIBLE CORRECTION. 149 ing to straighten the bent stick by puUing the two ends apart, and whena great amount of force has thus been expended in stretching the spine,lateral pressure is applied, when it also must be pushed to an extremeon account of the stretching of the spine in its Fig. 119.—Patient with Plastfr Jacket Applied in Apparatus.— (irnllstrin.) In some experiments on the scoliotic spine of a cada\er the following pointswere evident: There was in the spine a fixed region, bounded above and below by the mostmovable parts of the spine—the lower cervical and the lower dorsal region. Man-ipulations to correct either the rotation or the lateral curve were, therefore, morelikely to take effect above and below the curve than in the curve itself. Side pres- * R. W. Lovett: Bost. Med. and Surg. Jour., Oct. 31, iqoi. ^5° TREATMENT. sure pushed the whole dorsal region to the left, but made little impression on thecurve itself. This contrast between the fixed and movable portions was notably to be seenin attempts to correct the rotation. If oblique forward pressure were made uponthe angles of the ribs, as prominent on the right side of the back, the cage of thethorax revolved horizontally,
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