Muscles Of The Anterior Thigh

Question 1

______ is the longest muscle of the body?

Answer 1

Sartorius muscle

Question 2

Origin and insertion of sartorius

Answer 2

Origin

From the ASIS and the notch below it

Insertion

Inserts into the upper part of the medial surface of the tibia by a flat tendon

Question 3

_____ is the most superficial of the anterior thigh muscles?

Answer 3

Sartorius

Question 4

Action of sartorius

Answer 4

Helps put lower limbs in the classical cross-legged position by acting on both the hip & knee joint:

• Flexion, abduction & lateral rotation of the thigh
• Flexion & medial rotation of the knee joint

*(Internally rotates the leg when knee joint is flexed)

• Stabilizes the mobile pelvis (also performs pelvis anterior tilt)

Question 5

What forms the lateral boundary of the femoral triangle?

Answer 5

Sartorius muscle

Question 6

______ forms the roof of the subsartorial canal

Answer 6

Sartorius muscle

Question 7

3 nerves surround the sartorius muscle

Answer 7

F

2 nerves pierce the sartorius muscle

Question 8

What are the nerves that pierce the sartorius muscle?

Answer 8

• Saphenous nerve pierces it above its insertion
• Intermediate cutaneous nerve of thigh pierces it below its origin

Question 9

_______ is the biggest muscle of the body?

Answer 9

Quadriceps

Question 10

Origin and Insertion of rectus femoris

Answer 10

Origin

Straight head from AIIS

Reflected head from groove above the acetabulum (supraacetabula groove)

Insertion

Base of the patella