Fig. 3From: Normal patellofemoral kinematic patterns during daily activities in dogsPatellofemoral flexion-extension over the course of femorotibial flexion-extension. Each color represents a daily activity of dogs and the flexion-extension patellofemoral kinematic properties are compared over the course of femorotibial flexion-extension. For the x-axis, higher values indicate greater femorotibial extension. For the y-axis, higher values indicate greater patellofemoral flexion, where the patellar long axis is less parallel to the femoral long axisBack to article page