O: Ischial tubersity
I: Fibular head
A: Hip extension / Prime mover for knee flexion, lateral rotation
Inn: Sciatic nerve
Biceps Femoris (Long head)
O: Linea aspera (mid-shaft)
I: Fibular head
A: Knee flexion, lateral rotation
Inn: Sciatic nerve
Biceps Femoris (Short head)
O: Ischial tuberosity
I: Proximal anteromedial tibia (pes anerinus tendon)
A: Hip extension / Knee flexion, medial rotation
Inn: Sciatic nerve
Semitendinosus
O: Ischial tuberosity
I: Posterior aspect of the medial condyle of tibia
A: Hip extension / Knee flexion, medial rotation
Inn: Sciatic nerve
Semimembranosus