Anterior Thigh Muscles

Question 1

Anterior thigh muscles

Answer 1

Iliospoas
Sartorius
Quadriceps femoris
Rectus femoris
Vastus medialis
Vastus laterlis
Vastus intermedius

Question 2

Iliospoas

Answer 2

Comprises iliacus and psoas major:
• Iliacus arises from the iliac fossa;
• Psoas major arises from vertebrae T12-L5.
• Together, these muscles insert on the lesser trochanter, and flex the thigh.

Question 3

Sartorius

Answer 3

• Originates on the anterior superior iliac spine
• Inserts on the proximal anteromedial tibia;
• It flexes and laterally rotates the thigh; flexes and medially rotates the leg.

Question 4

Quadriceps femoris

Answer 4

Comprises rectus femoris, vastus medialis, vastus lateralis, and vastus intermedius. – These
muscles insert at the patella and tibial tuberosity (via tendon of quadriceps femoris). – They all extend the leg.

Question 5

Rectus femoris

Answer 5

– The anterior inferior iliac spine, – And the superior rim of the acetabulum – Rectus femoris flexes the thigh (in addition
to extending the leg like the other quadriceps muscles)

Question 6

Vastus medialis

Answer 6

– Originates on the intertrochanteric line and linea aspera (of the femur).

Question 7

Vastus lateralis

Answer 7

Originates on the intertrochanteric line, linea aspera, greater trochanter, and gluteal tuberosity.

Question 8

Vastus intermedius

Answer 8

Originates on the shaft of the proximal femur