FIG. 8.
Offset of the stapes head from the origin A in intrinsic frame (n = 32 for humans and n = 11 for guinea pigs) and B in principal frame (n = 28 for humans and n = 9 for guinea pigs). In the intrinsic frame, (x H/z H, y H/z H) = (0.073 ± 0.075, −0.063 ± 0.072) for humans and (x H/z H, y H/z H) = (0.081 ± 0.034, −0.119 ± 0.023) for guinea pigs. In the principal frame, (x′ H/z′ H, y′ H/z′ H) = (0.029 ± 0.088, 0.039 ± 0.048) for humans and (x′ H/z′ H, y′ H/z′ H) = (−0.160 ± 0.085, −0.019 ± 0.031) for guinea pigs.