Hip Muscles

Question 1

Psoas Major

Answer 1

PA: TP’s of vertebral bodies and adjoining discs of T12-L5
DA: Lesser trochanter
INN: Ventral Rami L1-3(4)
ACT: Flexion, ER of hip, trunk ipsi SB, spinal flexion during sit-ups, spinal stabilization

Question 2

Iliacus

Answer 2

PA: superior 2/3 of iliac fossa; anterior SI ligaments
DA: lesser trochanter of femur
INN: femoral nerve L2-3
ACT: flexes hip, ER’s flexed hip

Question 3

Rectus Femoris

Answer 3

PA: straight head: AIIS; reflected head: groove on ilium superior to acetabulum, fibrous capsule of hip joint
DA: patella by quadriceps tendon, tibial tuberosity by patellar tendon (ligament)
INN: femoral nerve L2, 3, 4
ACT: extends knee, flexes hip
*Two joint muscle

Question 4

Sartorius

Answer 4

PA: ASIS
DA: proximal medial surface of tibia at pes anserine
INN: femoral nerve L2-3
ACT: flex, ER and ABD hip; flex and IR knee

Question 5

Tensor Fascia Latae

Answer 5

PA: anterior iliac crest, lateral surface ASIS, and a portion of the border of the notch below it
DA: iliotibial band and hence to the lateral tibial condyle at Gerdy’s tubercle of tibia
INN: superior gluteal nerve L4,5 S1
ACT: extends and ER the knee; flexes, ABD, and IR the hip. Dynamic Stabilizer of the knee joint
*Also considered a two joint muscle