Knee Extensors

Question 1

Rectus Femoris

Answer 1

Origins: Straight head- AIIS
Reflected head- rough area of ilium sup to Acet.
Insertion: base of patella, joins quad fem tendon

Innervation: Femoral L2-4

Question 2

Vastus Intermedius (deep to rec fem)

Answer 2

Origin: ant and lat aspects of upp2/3 of femur
Insertion: deep part of quad tendon and base of patella

Innervation: Femoral L2-4

Question 3

Vastus Medialis

Answer 3

Origins: lower part of intertrochanteric line, medial lip linea aspera, upper part med supracondylar line
Insertion: med border of patella

Innervation: Femoral L2-4

Question 4

Vastus Lateralis

Answer 4

Origins: upper part intertrochanteric line, lower border greater trochanter, lat side glute tuberosity, upper1/2 lat lip linea aspera
Insertion: base and lat border of patella

Innervation: Femoral L2-4