Muscles of the Posterior Thigh

Question 1

What is the innervation, blood supply, and action of the semitendinous muscle?

Answer 1

Deep femoral artery (profunda femoris), medial circumflex, lateral circumflex arteries, perforating branches (4)

tibial portion of sciatic nerve

extends thigh, flexes and rotates leg medially

Question 2

Where does the semitendinous muscle insert?

Answer 2

medial surface of upper part of tibia

Question 3

What is the innervation, blood supply, and action of the semimembranous muscle?

Answer 3

Deep femoral artery (profunda femoris), medial circumflex, lateral circumflex arteries, perforating branches (4)

tibial portion of sciatic nerve

extends thigh, flexes and rotates leg medially

Question 4

Where does the semimembranous muscle insert?

Answer 4

medial condyle of tibia

Question 5

What is the innervation, blood supply, and action of the biceps femoris muscle

Answer 5

Deep femoral artery (profunda femoris), medial circumflex, lateral circumflex arteries, perforating branches (4)

tibial portion of sciatic nerve

extends thigh, flexes and rotates leg laterally

Question 6

Where does the biceps femoris muscle insert?

Answer 6

head of fibula