Posterior thigh muscles

Question 1

Insertion of biceps femoris?

Answer 1

Head of fibula

Question 2

Innervation of long head of biceps femoris?

Answer 2

Tibial n.

L5-S2

Question 3

Action of long head of biceps femoris?

Answer 3

Hip joint: extends hip, stabilizes pelvis in sagittal plane

Knee joint: flexion and external rotation

Question 4

Innervation of short head of biceps femoris?

Answer 4

Common fibular n.

L5-S2

Question 5

Action of short head of biceps femoris?

Answer 5

Knee joint: flexion and external rotation

Question 6

Origin of semimembranosus?

Answer 6

Ischial tuberosity

Question 7

Insertion of semimembranosus?

Answer 7

Medial tibial condyle, oblique popliteal ligament, popliteus fascia

Question 8

Innervation of semimembranosus and semitendinosus?

Answer 8

Tibial n. (L5-S2)

Question 9

Action of semimembranosus and semitendenosus?

Answer 9

Hip joint: extends hip, stabilizes pelvis in sagittal plane

Knee joint: flexion and internal rotation

Question 10

Origin of semitendenosus?

Answer 10

Ischial tuberosity and sacrotuberous ligament (common head w/ long head of biceps femoris)

Question 11

Insertion ofsemitendinosus?

Answer 11

Medial to tibial tuberosity in the pes anserinus (along w/ the tendons of gracilis and sartorius)

Question 12

Origin of biceps femoris?

Answer 12

Long head: ischial tuberosity, sacrotuberous ligament (common head w/ semitendenosus)
Short head: lateral lip of linea aspera in middle third of femur