Hip and posterior thigh

Question 1

What are the hamstring muscles of the posterior compartment of the thigh?

Answer 1

Semimembranosus muscle
Semitendinosus muscle
Biceps femoris

Question 2

What is the proximal attachment of the semimembranosus muscle?

Answer 2

Ischial tuberosity

Question 3

What is the distal attachment of the semimembranosus muscle?

Answer 3

Posterior portion of medial tibial condyle

Question 4

What is the action of the semimembranosus muscle?

Answer 4

• Flexion of knee
• Extension of hip
• Medial rotation of tibia (esp. when knee flexed)

Question 5

What is the innervation of the semimembranosus muscle?

Answer 5

Tibial nerve: L5,S1,S2

Question 6

What is the proximal attachment of the semitendinosus muscle?

Answer 6

Ischial tuberosity

Question 7

What is the distal attachment of the semitendinosus muscle?

Answer 7

Superomedial tibial shaft

Question 8

What is the action of the semitendinosus muscle?

Answer 8

• Flexion of knee
• Extension hip
• Medial rotation of tibia (esp. when knee flexed)

Question 9

What is the innervation of the semitendinosus muscle?

Answer 9

Tibial nerve: L5,S1,S2

Question 10

What is the proximal attachment of the biceps femoris?

Answer 10

• Long head: Ischial tuberosity

- Short head: linea aspera and lateral supracondylar ridge of femur

Question 11

What is the distal attachment of the biceps femoris?

Answer 11

• Fibula head

- Lateral tibial condyle

Question 12

What is the action of the biceps femoris?

Answer 12

• Flexion of knee
• Lateral rotation tibia
• Extension of hip (long head only)

Question 13

What is the innervation of the biceps femoris?

Answer 13

• Long head: tibial nerve (L5,S1,S2)

- Short head: common peroneal nerve (L5,S1,S2)