If the posterolateral aspect of the joint is to be exposed, elevate the lateral head of the gastrocnemius muscle from the femur and approach the lateral compartment between the tendon of the biceps femoris and the lateral head of the gastrocnemius muscle.

• 如要显露关节的后外侧面，可将腓肠肌外侧头从股骨上剥离，于股二头肌腱和腓肠肌外侧头之间进人关节外侧室。