Pelvis, Hip, Thigh Muscles

Question 1

Iliacus

(ee-lee-uh-cus)

Answer 1

Innervation: femoral nerve ​

Origin: iliac fossa

​Insertion: tendon of psoas major (often the two together are called the ​Iliopsoas muscle) ​

Action: flexion and lateral rotation of femur

Question 2

Sartorius

(sar-tore-ee-us)

Answer 2

Innervation: femoral nerve

​Origin: ASIS ​

Insertion: proximal, medial tibial shaft just inferior to the medial tibial ​condyle ​

Action: flexion, lateral rotation, and abduction of the thigh; flexion and medial rotation of the leg

Question 3

Rectus Femoris

Answer 3

Innervation: femoral nerve ​

Origin: AIIS ​

Insertion: tibial tuberosity

​Action: flexion of the thigh, extension of the leg

Question 4

Vastus Medialis

Answer 4

Innervation: femoral nerve

​Origin: linea aspera and distal, medial aspect of the femur

​Insertion: tibial tuberosity ​

Action: extension of the leg

Question 5

Vastus Lateralis

Answer 5

Innervation: femoral nerve ​

Origin: greater trochanter and linea aspera of the femur

​Insertion: tibial tuberosity ​

Action: extension of the leg

Question 6

Psoas Major

Answer 6

Innervation: lumbar nerves 2-3

​Origin: transverse processes, bodies, intervertebral discs of T12-L5 ​

Insertion: lesser trochanter of femur ​

Action: flexion and lateral rotation of femur, flexion of lumbar vertebra

Question 7

Vastus Intermedius

Answer 7

Innervation: femoral nerve ​

Origin: proximal 2/3 of the anterior and lateral femur ​

Insertion: tibial tuberosity ​

Action: extension of the leg