Figure 1: (a) At the gluteal sulcus. The red arrow indicates the sciatic nerve. BFM: Biceps femoris muscle, STM: Semitendinosus muscle, AMM: Adductor magnus muscle, VLM: Vastus lateralis muscle, (b) at the midpoint between the gluteal sulcus and the popliteal fossa. The red arrow indicates the sciatic nerve. FBM: Long head of biceps femoris muscle, STM: Semitendinosus muscle, SMM: Semimembranosus muscle, F: Femur