Anterior Muscles of the Thigh

Question 1

Sartorius

Answer 1

O: anterior superior iliac spine (ASIS)

I: medial surface - proximal end of the tibial just distal to the tibial tuberosity

A: flexion, abduction, and lateral rotation of the thigh + flexion of the leg

In: femoral nerve

Question 2

Tensor Fasciae Latae (TFL)

Answer 2

O: iliac crest posterior to the anterior superior iliac spine

I: iliotibial tract

A: flexion, abduction, and medial rotation of the thigh

In: superior gluteal nerve

Question 3

Rectus Femoris

Answer 3

O: ASIS + ilium above acetabulum

I: patella and through patellar ligament to tibial tuberosity

A: extension of leg, flexion of thigh

In: femoral nerve

Question 4

Vastus Medialis

Answer 4

O: medial lip of linea aspera + lower part of intertrochanteric line

I: patella and through patellar ligament to the tibial tuberosity

A: extension of the leg

In: femoral nerve

Question 5

Vastus Lateralis

Answer 5

O: lateral lip of linea aspera of femur, limited origin from intertrochanteric line

I: patella and through patellar ligament to the tibial tuberosity

A: extension of the leg

In: femoral nerve

Question 6

Vastus Intermedius

Answer 6

O: anterior and lateral surfaces of the femur

I: patella and through patellar ligament to the tibial tuberosity

A: extension of the leg

In: femoral nerve

Question 7

Articularis Genus

Answer 7

O: distal part of the anterior surface of the femur

I: synovial membrane of knee joint

A: pulls synovial membrane of the knee proximally during extension of the leg

In: femoral nerve