Posterior Compartment of the Thigh/Deep Hip Flexors

Question 1

Semitendinosus Origin

Answer 1

Ischial Tuberosity

Question 2

Semitendinosus Insertion

Answer 2

1. anteromedial aspet of superior tibia
2. contributes to pes anserinus

Question 3

semitendinosus action

Answer 3

1. hip extension
2. knee flexion
3. knee internal rotation (open chain)

Question 4

semitendinosus innervation

Answer 4

tibial

Question 5

semimembranosus origin

Answer 5

ischial tuberosity

Question 6

semimembranosus insertion

Answer 6

posterior medial aspect of the medial aspect of the medial tibial condyle

Question 7

semimembranosus action

Answer 7

1. hip extension
2. knee flexion
3. knee internal rotation (open chain)

Question 8

semimembranosus innervation

Answer 8

tibial

Question 9

biceps femoris origin

Answer 9

long head: ischil tuberosity and sacrotuberous ligament
short head: lateral lip of linea aspera

Question 10

biceps femoris insertion

Answer 10

head of fibula

Question 11

biceps femoris action

Answer 11

1. knee flexion
2. hip extension (long head)
3. knee external rotation (open chain)

Question 12

biceps femoris innervation

Answer 12

long head: tibial
short head: common fibular

Question 13

iliacus origin

Answer 13

iliac fossa

Question 14

iliacus insertion

Answer 14

lesser trochanter

Question 15

iliacus action

Answer 15

1. hip flexion
2. hip external rotation

Question 16

iliacus innervation

Answer 16

femoral

Question 17

psoas major origin

Answer 17

bodies and transverse process of T12-L5

Question 18

Psoas major insertion

Answer 18

lesser trochanter

Question 19

Psoas major action

Answer 19

1. hip flexion
2. hip external rotation

Question 20

psoas major innervation

Answer 20

ventral rami L1-3