Muculature of the Anterior Compartment of the Thigh

Question 1

What is the main action of the anterior compartment of the thigh muscles?

Answer 1

• Hip flexors

- Knee Extensors

Question 2

What are the anterior compartment muscles (5)

Answer 2

1. Sartorius
2. Pectineus
3. Iliopsoas
4. Tensor fascia lata
5. Quadriceps femorus

Question 3

Can the psoas minor flex the hip?

Answer 3

No- it does not cross the hip joint

-It inserts on the pectineal line of the pubis

Question 4

Even though this muscle is anteriorly placed, it is a gluteal region muscle

Answer 4

Tensor fascia lata

Question 5

The tensor fascia lata ALWAYS works in concert with… (2)

Answer 5

• Iliopsoas

- Rectus femorus

Question 6

This muscle is thought to be the transitional muscle between the anterior and medial compartments

• often has 2 layers with 2 different innervations
• Has a role in adduction as well as flexing the hip

Answer 6

Pectineus

Question 7

This muscle forms the main bulk of the anterior thigh

Answer 7

Quadriceps femoris muscle

Question 8

What are the 4 components of the quadriceps femoris muscle

Answer 8

• Vastus lateralis
• Vastus medialis
• Vastus intermediatus
• Rectus Femoris

Question 9

What is the main action of the QUAD muscles

Answer 9

Extensors of the knee

Question 10

What is the common insertion of the QUAD muscles

Answer 10

Quadriceps tendon–> patellar tendon–> tibial tuberosity

Question 11

What are the 4 different origins of the QUAD muscles

Answer 11

Vastus Lateralis= greater trochanter of the femur
Vastus medialis= intertrochanteric line
Vastus intermedius= shaft of the femur
Rectus Femorus= AIIS

Question 12

This muscle of the QUAD group crosses the hip joint and aids the iliopsoas muscle in hip flexion

Answer 12

The rectus femoris (bc it attaches at the AIIS)

Question 13

What innervates the QUADS?

Answer 13

Femoral nerve