http://www.ejbjs.org/cgi/reprint/34/1/47.pdf Neither the candle nor the spine, however, will buckle if placed in recumbency. Thus scoliosis does not develop in the horizontal spines of quadrupeds (fowl, 1)eing bipeds, are afflicted with the condition 6,), and recumbency arrests the progress of the disease in the child ı.
The basis for this phenomenon is found in the fact that pressure arrests epiphyseal growth. This ancient principle, used by the Chinese in producing boun(1-foot deformities, finds its modern expression in the stapling of Blount in which epiphyseal growth is arrested through pressure produced by a metallic staple. Growth is resumed when the staple is removed. The application of this principle to scoliosis is illustrated in Figures 1, 2, and 3. The vertical spinal column of all bipeds is continually being compressed by the action of gravity. So long as the spine is straight, as viewed from the front, tile pressure of weightbearing is evenly distributed between the right and left halves of each growing vertebral epiphyseal plate (Fig. 1). Hence any growth arrest due to pressure induced by gravity will be symmetrical, and no lateral deviation due to unequal growth will occur.
On the other hand, a functional curvature inevitably produces an asymmetrical distribution of gravitational pressure in the right and left halves of the upright spine (Fig. 2), and considerable compression may develop in the concavity of the curve ı. The vertebral bodies which are unequally compressed will grow unequallyf, yielding in time the wedged vertebrae of structural scoliosis (Fig. 3).
Картинки, X-rays
Neither the candle nor the spine, however, will buckle if placed in recumbency.
Thus scoliosis does not develop in the horizontal spines of quadrupeds (fowl, 1)eing bipeds, are afflicted with the condition 6,), and recumbency arrests the progress of the disease in the child ı.
The basis for this phenomenon is found in the fact that pressure arrests epiphyseal growth. This ancient principle, used by the Chinese in producing boun(1-foot deformities, finds its modern expression in the stapling of Blount in which epiphyseal growth is arrested through pressure produced by a metallic staple. Growth is resumed when the staple is removed.
The application of this principle to scoliosis is illustrated in Figures 1, 2, and 3. The vertical spinal column of all bipeds is continually being compressed by the action of gravity. So long as the spine is straight, as viewed from the front, tile pressure of weightbearing is evenly distributed between the right and left halves of each growing vertebral epiphyseal plate (Fig. 1). Hence any growth arrest due to pressure induced by gravity
will be symmetrical, and no lateral deviation due to unequal growth will occur.
On the other hand, a functional curvature inevitably produces an asymmetrical distribution of gravitational pressure in the right and left halves of the upright spine (Fig. 2), and considerable compression may develop in the concavity of the curve ı. The vertebral bodies which are unequally compressed will grow unequallyf, yielding in time the wedged vertebrae of structural scoliosis (Fig. 3).