Muscles of the Knee Joint : Hamstring Group

Question 1

What are the muscles of the hamstring group?

Answer 1

1. Biceps Femoris
2. Semitendinosus
3. Semimembranosus

Question 2

What is the origin, insertion and actions of Biceps Femoris?

Answer 2

O : Ischial tuberosity (long head) and the Linea Aspera (short head)
I : Head of the fibula
A :
1. Flexes the leg at the knee joint
2. Extends the thigh at the hip joint

Question 3

What is the origin, insertion and actions of Semitendinosus?

Answer 3

O : Ischial Tuberosity
I : Pes Anserine Tendon
A :
1. Flexes the leg at the knee joint
2. Extends the thigh at the hip joint

Question 4

What is the origin, insertion and actions of Semimembranosus?

Answer 4

O : Ischial tuberosity
I : Posterior surface of the medial condyle of the tibia
A :
1. Flexes the leg at the knee joint
2. Extends the thigh at the hip joint