GROWTH OF MAJOR LONG BONES IN HEALTHY CHILDREN

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Abstract
A few years ago an associate and I presented a method for the study of segmental skeletal growth—the measurement of length of bones from roentgenograms.1 These measurements were shown to be more reliable than anthropometric measurements in calculating the growth in length of the extremities of a group of 80 infants. This same method of measuring the length of the humerus, radius, ulna, femur, tibia and fibula from seriatim roentgenograms of the extremities during childhood has been utilized in the collection of data for the present study. The rates of growth of the individual long bones of the extremities, together with the relationships that exist between them and the rate of general skeletal growth, seem to add considerably to one's appreciation of the orderliness of the skeletal growth process. They add also to an understanding of the variations in bodily proportions which differentiate one child from another. MATERIAL The 113

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