A treatise on orthopedic surgery . 6 73.8 73.2 76.3 75.6 82.8 82.8 89.1 89.1 96.7 96.7 106.8 105.3 112.0 110.9 117.4 116.7 122.3 122.1 127.2 126.0 132.6 131.5 137.2 136.6 141.7 145.2 147.7 149.2 155.1 153 2 159.0 155.9 Chest. Inches. 13.413.016.516.118.017.418.518.019.018.520.119.820.720.521.521.023.222.823.723.324.423.825.124.525.824.726.425.827.026.827.728.028.829.230.030.3 Cm. 34.2 33.2 42.0 41.0 45.9 44.4 47.1 45.9 48.4 47.0 51.1 50.5 52.8 52.2 54.8 53.5 59.1 58.3 60.6 59.5 62.2 60.8 63.9 62.5 65.6 63.0 67.2 65.8 68.8 68.3 70.6 71.3 73.3 74.1 76.6 79.8 240 ORTHOPEDIC SUEGEBY. THE FUNCTIONA
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A treatise on orthopedic surgery . 6 73.8 73.2 76.3 75.6 82.8 82.8 89.1 89.1 96.7 96.7 106.8 105.3 112.0 110.9 117.4 116.7 122.3 122.1 127.2 126.0 132.6 131.5 137.2 136.6 141.7 145.2 147.7 149.2 155.1 153 2 159.0 155.9 Chest. Inches. 13.413.016.516.118.017.418.518.019.018.520.119.820.720.521.521.023.222.823.723.324.423.825.124.525.824.726.425.827.026.827.728.028.829.230.030.3 Cm. 34.2 33.2 42.0 41.0 45.9 44.4 47.1 45.9 48.4 47.0 51.1 50.5 52.8 52.2 54.8 53.5 59.1 58.3 60.6 59.5 62.2 60.8 63.9 62.5 65.6 63.0 67.2 65.8 68.8 68.3 70.6 71.3 73.3 74.1 76.6 79.8 240 ORTHOPEDIC SUEGEBY. THE FUNCTIONAL PATHOGENESIS OF DEFORMITY. Wolffs Law.—Every change in the form and function ofthe bones or of their function alone is followed by certaindefinite changes in their internal architecture, and equallydefinite secondary alternations of their external conformation, in accordance with mathematical laws. Mention has been made, and will be made again from time totime, of the adaptation of the body to abnormal conditions, and Fig. 179.. Dislocated femur, showing the atrophy and rearrangement of the internal struc-ture as compared with the normal (Pig. ISO). (Freiberg.) of the transformation of deformed parts to the normal when theimproper relations of weight and strain have been removed.Wolff first called attention to the fact that the shape of a boneis the effect of function. It is the effect of function in that ifthe work required of it had been different its shape would havebeen diftcreut. This function has shaped not only the externalcontour but the internal structure as well. If a bone is broken, DEFOBMITIES OF THE SPINE. 241 for example, the neck of the femur, and deformity results, theinternal architecture is no longer suitable for the new conditionsof weight and strain, and immediately a rearrangement begins, which finally transforms the internal structure, not only in theneighborhood of the injury, but in the extremity of the bonealso, to adapt the deformed part as well as m