Quadriceps Femoris Group

Question 1

Name the four muscles of the Quadriceps femoris group

Answer 1

Rectus Femoris
Vastus Lateralis
Vastus Medialis
Vastus Intermedius
(Articularis Genu)

Question 2

Give the proximal attachment of the rectus femoris

Answer 2

Straight head - AIIS

Reflected head - rough area of the ilium, superior to the acetabulum

Question 3

Give the distal attachment of the rectus femoris

Answer 3

The upper border of the patella via the Quadriceps tendon with some anterior fibres crossing the patella to form the patella tendon which inserts into the tibial tuberosity

Question 4

Give the action of the Rectus Femoris muscle

Answer 4

Extends the knee

Flexes the hip

Question 5

Give one functional activity in which the quadriceps femoris participates

Answer 5

The knee extension phase of running/ walking/sit to stand/climbing stairs

Question 6

Give attachments of vastus intermedius

Answer 6

Origin: Upper 2/3 anterior and lateral surfaces of femur

Insertion: Quadriceps tendon (deep to rectus femoris) to lateral border of patella

Question 7

Give actions of vastus intermedius

Answer 7

Knee extension

Question 8

Give attachments of vastus lateralis

Answer 8

Origin: intertrochanteric line, greater trochanter, gluteal tuberosity, lateral lip linea aspera

Insertion: Quadriceps tendon to lateral border of patella

Question 9

Give actions of vastus lateralis

Answer 9

Knee extension

Question 10

Give attachments of vastus medalis

Answer 10

Origin: Medial part of inter-trochanteric line, pectineal line, medial lip of linea aspera, medial supracondylar line

Insertion: Quadriceps tendon to medial border of patella

Question 11

Give actions of vastus medialis

Answer 11

Knee extension

Question 12

Give innervation of quadriceps femoris

Answer 12

Femoral nerve: L2-4