Fig. 4
From: Normal patellofemoral kinematic patterns during daily activities in dogs
Patellofemoral craniocaudal translation over the course of femorotibial flexion-extension. Each color represents a daily activity of dogs and the craniocaudal patellofemoral kinematic properties are compared over the course of femorotibial flexion-extension. Craniocaudal translation measurements of the patella relative to the femur in mm. For the x-axis, higher values indicate greater femorotibial extension. For the y-axis, higher values indicate greater cranial translation of the patella, where the patellar origin is displaced more cranially to the femoral origin