Anterior Thigh Muscles

Question 0

Insertion of the pectineus

Answer 0

Pectineal line of femur, just inferior to lesser trochanter

Question 1

Origin of the pectineus

Answer 1

Superior ramus of pubis

Question 2

Innervation of pectineus

Answer 2

Femoral nerve (L2, L3) 
May receive branch from obturator nerve

Question 3

Actions of the pectineus

Answer 3

Adducts and flexes thigh

Assists with medial rotation of the thigh

Question 4

Origin of the sartorius

Answer 4

Anterior superior iliac spine and superior part of notch inferior to it

Question 5

Insertion of sartorius

Answer 5

Superior part of medial surface of tibia

Question 6

Innervation of sartorius

Answer 6

Femoral nerve (L2, L3)

Question 7

Actions of the sartorius

Answer 7

Flexes, abducts, and laterally rotates thigh at hip joint

Flexes leg at knee joint

Question 8

Origin of the psoas major

Answer 8

Sides of the T12-L5 vertebrae and discs between them

Transverse processes of all lumbar vertebrae

Question 9

Insertion of the psoas major

Answer 9

Lesser trochanter of the femur

Question 10

Innervation of the psoas major

Answer 10

Anterior rami of lumbar nerves (L1, L2, L3)

Question 11

Actions of the psoas major

Answer 11

Acting conjointly in flexing thigh at hip joint and in stabilizing this joint
Also a postural muscle that helps control deviation of the trunk and is active during standing

Question 12

Origin of the iliacus

Answer 12

Iliac crest
Iliac fossa
Ala of sacrum
Anterior sacroiliac ligaments

Question 13

Insertion of the iliacus

Answer 13

Tendon of the psoas major

Lesser trochanter and femur distal to it

Question 14

Innervation of the iliacus

Answer 14

Femoral nerve (L2, L3)

Question 15

Actions of the iliacus

Answer 15

Acting conjointly in flexing thigh at hip joint and in stabilizing this joint

Question 16

Origin of the rectus femoris

Answer 16

Anterior inferior iliac spine

Ilium superior to acetabulum

Question 17

Insertion of the rectus femoris

Answer 17

Via common tendinosus (quadriceps tendon) and independent attachments to base of patella
Indirectly via patellar ligament to tibial tuberosity

Question 18

Innervation of the rectus femoris

Answer 18

Femoral nerve (L2, L3, L4)

Question 19

Actions of the rectus femoris

Answer 19

Extends leg at knee joint

steadies hip joint and helps iliopsoas flex thigh

Question 20

Origin of the vastus lateralis

Answer 20

Greater trochanter and lateral lip of the linea aspera

Question 21

Insertion of the vastus lateralis

Answer 21

Via common tendinosus (quadriceps tendon) and independent attachments to base of patella
Indirectly via patella ligament to tibial tuberosity
Tibia and patella via aponeurosis (patellar retinacula)

Question 22

Innervation of the vastus lateralis

Answer 22

Femoral nerve (L2, L3, L4)

Question 23

Actions of the vastus lateralis

Answer 23

Extends leg at knee joint

Question 24

Origin of the vastus medialis

Answer 24

Intertrochanteric line and medial lip of linea aspera of femur

Question 25

Insertion of the vastus medialis

Answer 25

Via common tendinosus (quadriceps tendon) and independent attachments to base of patella
Indirectly via patella ligament to tibial tuberosity
Tibia and patella via aponeurosis (patellar retinacula)

Question 26

Innervation of the vastus medialis

Answer 26

Femoral nerve (L2, L3, L4)

Question 27

Actions of the vastus medialis

Answer 27

Extends leg at knee joint

Question 28

Origin of the vastus intermedius

Answer 28

Anterior and lateral surfaces of shaft of femur

Question 29

Insertion of the vastus intermedialis

Answer 29

Via common tendinosus (quadriceps tendon) and independent attachments to base of patella
Indirectly via patella ligament to tibial tuberosity

Question 30

Innervation of the vastus intermedialis

Answer 30

Femoral nerve (L2, L3, L4)

Question 31

Action of the vastus intermedialis

Answer 31

Extends the leg at knee joint