LOWER LIMB MUSCLES: ANTERIOR THIGH

Question 1

Which nerves innervate the psoas major?

Answer 1

branches of the ventral primary rami of spinal nerves L2-L4

Question 2

Which blood vessels supply the psoas major?

Answer 2

subcostal artery, lumbar arteries

Question 3

Where is the origin of the psoas major?

Answer 3

bodies and transverse processes of lumbar vertebrae

Question 4

Where is the insertion of the psoas major?

Answer 4

lesser trochanter of femur (with iliacus) via iliopsoas tendon

Question 5

Which nerve pierces the anterior surface of the psoas major muscle?

Answer 5

the genitofemoral nerve pierces the anterior surface of the psoas major muscle
(Greek, psoas = the muscles of the loins)

Question 6

Which nerves innervate the iliacus?

Answer 6

femoral nerve posterior divisions of L2, 3, 4

Question 7

Which blood vessels supply the iliacus?

Answer 7

iliolumbar artery

Question 8

Where is the origin of the iliacus?

Answer 8

iliac crest, upper 2/3 of iliac fossa anterior surface of sacroiliac and lumbosacral ligament

Question 9

Where is the insertion of the iliacus?

Answer 9

tendon of psoas major into lesser trochanter of femur

Question 10

What is the function of the iliacus?

Answer 10

flexes thigh and flexes pelvis on thigh

Question 11

Which nerve innervates the rectus femoris?

Answer 11

femoral nerve

Question 12

Which blood vessels supply the rectus femoris?

Answer 12

lateral femoral circumflex artery

Question 13

Where is the origin of the rectus femoris?

Answer 13

straight head - ASIS reflexed head - groove on upper surface of acetabulum

Question 14

Where is the insertion of the rectus femoris?

Answer 14

with the other parts of the quadriceps into the tibial tuberosity via the patellar tendon

Question 15

What is the function of the rectus femoris?

Answer 15

extends leg and weak flexor of hip

Question 16

Which nerves innervate the sartorius?

Answer 16

femoral nerve

Question 17

Which blood vessels supply the sartorius?

Answer 17

muscular branches of femoral artery

Question 18

Where is the origin of the sartorius?

Answer 18

anterior sup iliac spine (aka ASIS)

Question 19

Where is the insertion of the sartorius?

Answer 19

medial surface of tibia inferior to the tuberosity

Question 20

What is the function of the sartorius?

Answer 20

flexes thigh, flexes, knee and abducts and laterally rotates thigh

Question 21

Which nerves innervate the tensor fasciae latae?

Answer 21

superior gluteal nerve

Question 22

Which blood vessels supply the tensor fasciae latae?

Answer 22

superior gluteal artery and lateral
femoral circumflex artery

Question 23

Where is the origin of the tensor fasciae latae?

Answer 23

anterior border of ilium and iliac crest

Question 24

Where is the insertion of the tensor fasciae latae?

Answer 24

iliotibial tract in middle 1/3 of thigh

Question 25

What is the function of the tensor fasciae latae?

Answer 25

counter acts pull of gluteus maximus and aids in abduction, flexion, and medial rotation of the thigh

Question 26

Which nerves innervate the vastus intermedius?

Answer 26

femoral nerve

Question 27

Which blood vessels supply the vastus intermedius?

Answer 27

lateral femoral circumflex artery

Question 28

Where is the origin of the vastus intermedius?

Answer 28

distal half of lateral lip of linea aspera and upper 2/3 of anterolateral surface of the femur

Question 29

Where is the insertion of the vastus intermedius?

Answer 29

superior border of patella and by ligamentum patelae into tibial tuberosity

Question 30

What is the function of the vastus intermedius?

Answer 30

extends leg

Question 31

Which nerves innervate the vastus lateralis?

Answer 31

femoral nerve

Question 32

Which blood vessels supply the vastus lateralis?

Answer 32

lateral femoral circumflex artery

Question 33

Where is the origin of the vastus lateralis?

Answer 33

upper half of lateral lip of linea aspera

Question 34

Where is the insertion of the vastus lateralis?

Answer 34

lateral border of patella and tibial tuberosity via the patellar tendon

Question 35

What is the function of the vastus lateralis?

Answer 35

extends leg

Question 36

Which nerves innervate the vastus medialis?

Answer 36

femoral nerve

Question 37

Which blood vessels supply the vastus medialis?

Answer 37

muscular branches of femoral and profunda femoris artery

Question 38

Where is the origin of the vastus medialis?

Answer 38

medial lip of linea aspera

Question 39

Where is the insertion of the vastus medialis?

Answer 39

lateral border of patella and by patella ligament to tibial tuberosity

Question 40

What is the function of the vastus medialis?

Answer 40

extends leg and pulls patella medially