Anterior Thigh

Question 1

Psoas Major origin

Answer 1

Sides of transverse processes of T12-L5 and associated discs

Question 2

Psoas Major insertion

Answer 2

Lesser trochanter of femur

Question 3

Psoas Major action

Answer 3

Acts conjointly to flex thigh at hip joint; postural muscle, maintain lumbar lordosis

Question 4

Psoas Major innervation

Answer 4

Anterior rami of L1, L2, L3

Question 5

Iliacus origin

Answer 5

Iliac crest, fossa, ala of sacrum, anterior SI ligament

Question 6

Iliacus insertion

Answer 6

Tendon of Psoas Major into lesser trochanter of femur

Question 7

Iliacus action

Answer 7

Acts conjointly to flex thigh at hip joint; postural muscle, maintain lumbar lordosis

Question 8

Iliacus innervation

Answer 8

Femoral nerve L2*, L3

Question 9

Psoas Minor origin

Answer 9

Sides of transverse processes of T12 and L1 vertebrae and associated discs

Question 10

Psoas Minor insertion

Answer 10

Pectinal line of pubis

Question 11

Psoas Minor action

Answer 11

Weakly assists the Psoas Major

Question 12

Psoas Minor innervation

Answer 12

Anterior rami of L1, L2

Question 13

Rectus Femoris origin

Answer 13

AIIS, Ilium superior to the acetabulum

Question 14

Rectus Femoris insertion

Answer 14

Paella via the quadriceps tendon, continuing to the tibial tuberosity via patellar ligament

Question 15

Rectus Femoris action

Answer 15

Extend the leg at the knee, flex thigh

Question 16

Rectus Femoris innervation

Answer 16

Femoral nerve L2, L3, L4

Question 17

Vastus Lateralis origin

Answer 17

Greater trochanter, lateral lip of linea aspera

Question 18

Vastus Lateralis insertion

Answer 18

Patella via the quadriceps tendon, continuing to the tibial tuberosity via patellar ligament, patella and tibia via the lateral patellar retinaculum

Question 19

Vastus Lateralis action

Answer 19

Extend the leg at the knee

Question 20

Vastus Lateralis innervation

Answer 20

Femoral nerve L2, L3, L4

Question 21

Vastus Medialis origin

Answer 21

Intertrochanteric line, medial lip of linea aspera

Question 22

Vastus Medialis insertion

Answer 22

Patella via the quadriceps tendon, continuing to the tibial tuberosity via patellar ligament, patella and tibia via the medial patellar retinaculum

Question 23

Vastus Medialis action

Answer 23

Extend the leg at the knee

Question 24

Vastus Medialis innervation

Answer 24

Femoral nerve L2, L3, L4

Question 25

Vastus Intermedius origin

Answer 25

Anterior and lateral shaft of the femur

Question 26

Vastus Intermedius insertion

Answer 26

Patella via the quadriceps tendon, continuing to the tibial tuberosity via patellar ligament

Question 27

Vastus Intermedius action

Answer 27

Extend the leg at the knee

Question 28

Vastus Intermedius innervation

Answer 28

Femoral nerve L2, L3*, L4*

Question 29

Sartorius origin

Answer 29

ASIS & superior part of notch inferior to it

Question 30

Sartorius insertion

Answer 30

Anteriomedial surface of proximal tibia, continues to pes anserinus

Question 31

Sartorius action

Answer 31

Flex, externally rotates, and abducts the thigh, flexes and weakly internally rotates leg at knee

Question 32

Sartorius innervation

Answer 32

Femoral nerve L2, L3

Question 33

Pectineus origin

Answer 33

Superior ramus of pubis (pectineal line of pubis)

Question 34

Pectineus insertion

Answer 34

Inferior to lesser trochanter of femur (pectineal line of femur)

Question 35

Pectineus action

Answer 35

Adducts, flexes, and laterally rotates the thigh

Question 36

Pectineus innervation

Answer 36

Femoral nerve L2*, L3 (& also obturator nerve on occasion)