Anterior Thigh Muscles

Question 0

Pectineus Insertion

Answer 0

Pectineal line of femur, just inferior to lesser trochanter

Question 1

Pectineus Origin

Answer 1

Superior ramus of pubis

Question 2

Pectineus Innervation

Answer 2

Femoral Nerve (L2, L3); may receive branch from obturator nerve

Question 3

Pectineus Action

Answer 3

Adducts and flexes thigh

Assists with medial rotation of thigh

Question 4

Sartorius Origin

Answer 4

1. Anterior Superior Iliac Spine

2. Superior part of notch inferior to it

Question 5

Sartorius Insertion

Answer 5

Superior part of medial surface of tibia

Question 6

Sartorius Innervation

Answer 6

Femoral Nerve (L2, L3)

Question 7

Sartorius Action

Answer 7

Flexes, abducts, and laterally rotates thigh at hip joint

Flexes leg at knee

Question 8

Psoas Major Origin

Answer 8

1. Sides of T12-L5 vertebrae and discs between them

2. Transverse processes of all lumbar vertebrae

Question 9

Psoas Major Insertion

Answer 9

Lesser trochanter of femur

Question 10

Psoas Major Innervation

Answer 10

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

Question 11

Psoas Major Action

Answer 11

Acting conjointly with iliacus in flexing thigh at hip joint and in stabilizing joint;
postural muscle that helps control deviation of the trunk and is active during standing

Question 12

Iliacus Origin

Answer 12

1. Iliac crest
2. Iliac fossa
3. Ala of sacrum
4. Anterior sacroiliac ligaments

Question 13

Iliacus Insertion

Answer 13

1. Tendon of psoas major

2. lesser trochanter and femur distal to it

Question 14

Iliacus Innvervation

Answer 14

Femoral Nerve (L2, L3)

Question 15

Iliacus Action

Answer 15

Acting conjointly with psoas major in flexing thigh at hip joint and stabilizing joint

Question 16

Rectus Femoris Origin

Answer 16

1. Anterior inferior iliac spine

2. Ilium superior to acetabulum

Question 17

Rectus Femoris, Vastus lateralis,Vastus Medialis, Vastus Intermedialis Insertion

Answer 17

• Common tendinous (quadriceps tendon) and independent attachments to base of patella
• Indirectly via patellar ligament to tibial tuberosity
• medial and lateral vasti also attach to tibia and patella via aponeuroses (medial and lateral patellar retinacula)

Question 18

Rectus Femoris, Vastus lateralis, Vastus medialis, Vastus intermedius Innervation

Answer 18

Femoral Nerve (L2, L3, L4)

Question 19

Rectus Femoris, Vastus lateralis, Vastus medialis, Vastus intermedius (Quadriceps Femoris) Action

Answer 19

Extends leg at knee

Rectus Femoris also steadies hip joint and helps iliopsoas flex thigh

Question 20

Vastus lateralis origin

Answer 20

greater trochanter and lateral lip of linea aspera

Question 21

Vastus Medialis Origin

Answer 21

Intertrochanteric line and medial lip of linea aspera of femur

Question 22

Vastus Intermedius Origin

Answer 22

Anterior and lateral surfaces of shaft of femur