Fig. 7. Trabecular orientation reflects differences in joint flexion. (A) Mean density distributions for Incline (red), Level (blue) and Control (yellow) groups show a more posterior orientation of peak trabecular density (OPTD, crosses in the right panel). (B) Differences in OPTD correspond to differences in joint angle at peak GRF. (C) Individual OPTD values demonstrate greater variability in Level and Control subjects. Comparisons between Level and Incline groups demonstrate that differences in OPTD are significant (P=0.01, Student's t-test).