The joint center points of hip, knee and ankle joints are defined in the frontal plane. They are very useful landmarks in defining axis and angular parameters of the long bones.
Joint center points[edit | edit source]
Hip joint[edit | edit source]
1
Where to find the hip joint
For the hip joint or the proximal femur region, the joint center point is the center of the circular femoral head.
Knee joint[edit | edit source]
2
Where to find the knee joint
For the knee joint or the distal femur region, the joint center point is the apex of the femoral notch. For the knee joint or the proximal tibia region, the joint center point is the center of the tibial spines.
Ankle joint[edit | edit source]
3
Where to find the ankle joint
For the ankle joint or the distal tibia region, the joint center point is the center of the talus or plafond.