quadriceps femoris

Question 1

Answer 1

rectus femoris

• *Proximal attachment**: anterior inferior iliac spine and ilium superior to acetabulum
• *distal attachment** : quadriceps tendon and independent attachments to base of patella
• *Action** : extend knee joint, stabilizes hip joint and helps iliopsoas flex hip joint
• *innervation**: Femoral nerve (L2, L3, L4)

Question 2

Answer 2

vastus lateralis

Proximal attachment : greater trochanter and lateral lip of linea aspera (ridge of roughened surface on the posterior surface of the shaft of the femur where lots of muscles attach)

distal attachment : via common tendinous (quadriceps tendon) and base of patella; attachment to tibia and patella via aponeuroses (lateral retinacula)

Action : extend knee joint

innervation : femoral nerve (L2,L3, L4)

Question 3

Answer 3

vastus medialis

Medial attachment : intertrochanteric line and medial lip of linea aspera

distal attachment : via common tendinous (quadriceps tendon) and independent attachments to the base of patella, attaches to tibia and patella via aponeuroses (medial retinacula)

action : extend knee joint

innervation : femoral nerve (L2, L3, L4)

Question 4

vastus intermedius

Answer 4

proximal attachment: anterior and lateral surfaces of shaft of femur

distal attachment: via common tendinous (quadriceps tendon) and independent attachments to the base of patella; indirectly via patellar ligament to tibial tuberosity

action: extends knee joint

innervation : femoral nerve (L2, L3, L4)