Extensors of the knee

Question 1

Rectus femoris

Answer 1

Origins:
- straight head: Anterior Inferior Iliac Spine
- reflected head: Rough area of Ilium, superior to acetabulum
Insertion:
- Quadriceps tendon
Innervation:
Femoral nerve L2,3,4

Question 2

Vastus Intermedius

Answer 2

Origin:
Upper 2/3 of anterior and lateral surface of femur
Insertion:
Quadriceps tendon and lateral border of patella
Innervation:
Femoral nerve L2,3,4

Question 3

Vastus medialis

Answer 3

Origin:
Medial part of intertrochanteric line, Pectineal Line, medial lip of linea aspera, medial supracondylar line
Insertion:
Quadriceps tendon and medial border of patella
Innervation:
Femoral nerveL2,3,4

Question 4

Vastus Lateralis

Answer 4

Origin:
Lateral part of intertrochanteric line, lateral margin of greater trochanter, lateral margin of gluteal tuberosity, lateral lip of linea aspera
Insertion:
Quadriceps tendon and lateral margin of patella
Innervation:
Femoral nerve L2,3,4