MSK - Muscles of the Anterior Thigh (Hip Flexors)

Question 1

Name the hip flexors (5)

Answer 1

• Psoas Major
• Psoas Minor
• Iliacus
• Pectineus
• Sartorius

Question 2

What do the Psoas Major and Iliacus blend together to form?

Answer 2

Iliopsoas muscle

Question 3

What is the origin of the Psoas Major?

Answer 3

T12 - L5 Vertebrae

Question 4

What is the insertion point of the Psoas Major?

Answer 4

Lesser trochanter of the femur where it merges with the iliacus

Question 5

What is the innervation of the Psoas Major?

Answer 5

Anterior rami of L1-L3

Question 6

What are the actions of the Psoas Major?

Answer 6

• Flexion of the leg at the hip joint

- Assists in lateral rotation of the hip joint

Question 7

What is the origin of the Psoas Minor?

Answer 7

T12-L1

Question 8

What is the insertion of the Psoas Minor?

Answer 8

Iliopectineal Arch

Question 9

What is the innervation of the Psoas Minor?

Answer 9

• Anterior ramus of L1

Question 10

What are the actions of Psoas Minor?

Answer 10

• Stabilisation of pelvis and hip joint

- Weak flexion of the lumbar column

Question 11

What is the origin of the Iliacus?

Answer 11

• Iliac fossa of the pelvis

Question 12

What is the insertion of the Iliacus?

Answer 12

The lesser trochanter of the femur where it merges with the psoas major

Question 13

What is the innervation of the Iliacus?

Answer 13

Femoral Nerve

Question 14

What are the actions of the Iliacus?

Answer 14

• Flexion of the leg at the hip joint

- Lateral rotation of the hip joint

Question 15

Describe the Pectineus

Answer 15

• Flat

- Base of the femoral triangle

Question 16

What is the origin of the Pectineus?

Answer 16

Superior Pubic Rami

Question 17

Where does the Pectineus insert?

Answer 17

Pectineal line of the femur

Question 18

What is the innervation of the Pectineus?

Answer 18

• Femoral nerve

- Has a branch from the obturator nerve

Question 19

What are the actions of the Pectineus?

Answer 19

• Adduction of the hip joint

- Flexion of the hip joint

Question 20

Describe the Sartorius

Answer 20

• Longest muscle in the body
• Runs inferiomedially on the leg
• Most superficial muscle

Question 21

What is the origin of the Sartorius?

Answer 21

• Anterior superior iliac spine (ASIS)

Question 22

Where does the Sartorius insert?

Answer 22

The superior, medial surface of the tibia

Question 23

What is the innvervation of the Sartorius?

Answer 23

Femoral Nerve

Question 24

What are the actions of the Sartorius?

Answer 24

• Flexion, abduction and lateral rotation of the hip joint

- Flexion of the knee joint