Figure 10
From: Hip abductor moment arm - a mathematical analysis for proximal femoral replacement
Three-dimensional plot of abductor moment arm. Three-dimensional plot of abductor moment arm for a right hip where the x-y projection represents the coronal plane, the hip center is located at (0,0,0), and the z axis represents abductor moment arm. Abductor moment arm achieves a maximum value lateral to the abductor origin and does not increase if the insertion is moved further lateral. Negative moment arm values are possible medially where abductor muscle firing would result in adduction.