Table 2. Section properties of proximal femora (at 80% length[1 cm inferior to the lesser trochanter]) of two Paranthropus robustus specimens [37] and OH80.
Specimen | CA | MA | TA | %CA | IX | IY | J |
SK 82 | 490 | 87 | 577 | 84.9 | 21.637 | 31.261 | 52.899 |
SK 97 | 457 | 135 | 593 | 77.1 | 21.228 | 33.779 | 55.007 |
OH 80-12* | 524 | 87 | 611 | 85.7 | 26.234 | 32.458 | 58.691 |
CA, cortical area; MA, medullary area; TA, total periosteal area; %CA, [(CA/TA) · 100); Ix, second moment of area about X (ML) axis (AP bending rigidity); Iy, second moment of area about y (AP) axis (ML bending rigidity); J, polar second moment of area. Areas in mm2, second moments of area in mm4.
Measurements from the proximal shaft were obtained near the top of the preserved section, slightly at the same undertrochanteric section as suggested by Ruff et al. [37].