Hamstring muscles

Question 1

Give the location, origin, insertion, and action of the semimembranosus

Answer 1

o Origin: ischial tuberosity
o Insertion: posterior to the medial condyle of the tibia
o Action: extends the hip; flexes the knee

Question 2

Give the location, origin, insertion, and action of the semitendinosus

Answer 2

o Origin: ischial tuberosity
o Insertion: medial side of tibial tuberosity
o Action: extends the hip; flexes the knee

Question 3

Give the location, origin, insertion, and action of the biceps femoris

Answer 3

o Origin (long head): ischial tuberosity
o Origin (short head): linea aspera
o Insertion (both heads): head of fibula
o Action (long head): extends the hip; flexes the knee 
o Action (short head): flexes the knee