Determination of sex from the tibial shaft as well as the entire bone itself has not been generally investigated by osteologists . This paper is an attempt to fulfill this need. The purpose is to determine sex from both the complete tibia and the shaft at the nutrient foramen level. The sample was obtained from the Terry Collection and included 159 specimens of whites and blacks. The tibial length, and circumference, anteroposterior, and transverse measurements at the nutrient foramen level were analyzed by means of step-wise discriminant function analysis. It was found that the circumference alone could give, on the average, 80% accuracy in determining sex. The addition of other dimensions to the function increased the accuracy by about 4%. Comparisons of this study with those on the femur indicated that sexual dimorphism in the tibia was a result not only of the general growth and musculo-skeletal activity, but also of the genetic structure of the population, i.e., racial variation.
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