Muscles of the Lower Extremity: Anterior compartment of the Thigh

Question 1

Psoas Major Proximal Attachment

Answer 1

Transverse processes, intervertebral discs, and adjacent bodies of T12-L5

Question 2

Psoas Major Distal Attachment

Answer 2

Lesser trochanter of the femur

Question 3

Psoas Major Innervation

Answer 3

Femoral n. [L1,L2,L3]

Question 4

Psoas Major Action

Answer 4

Flexes the hip
Assists with:
-Hip lateral rotation
-Lumbar side flexion
-Lumbar stabilization
-Anterior pelvic tilt

Question 5

Iliacus Proximal Attachment

Answer 5

Iliac fossa and anterior ligaments of the lumbosacral and sacroiliac joints

Question 6

Iliacus Distal Attachment

Answer 6

Lesser trochanter of the femur

Question 7

Iliacus Innervation

Answer 7

Femoral n. [L1,L2,L3]

Question 8

Iliacus Action

Answer 8

Flexes the hip
Assists with:
-Hip lateral rotation
-Anterior pelvic tilt

Question 9

Sartorius Proximal Attachment

Answer 9

ASIS

Question 10

Sartorius Distal Attachment

Answer 10

Medial surface of tibia below the tibial condyle (Pes anserinus)

Question 11

Sartorius Innervation

Answer 11

Femoral n. [L2,L3]

Question 12

Sartorius Action

Answer 12

Flexes the hip
Laterally rotates the hip
Abducts the hip
Assists with:
-Knee flexion
-Tibia medial rotation

Question 13

Pectineus Proximal Attachment

Answer 13

Superior ramus of the pubis

Question 14

Pectineus Distal Attachment

Answer 14

Pectineal line of the femur

Question 15

Pectineus Innervation

Answer 15

Femoral n. and Obturator n. [*L2,L3]

Question 16

Pectineus Action

Answer 16

Adducts the hip
Assists with:
-Hip flexion

Question 17

Rectus Femoris Proximal Attachment

Answer 17

AIIS

Question 18

Rectus Femoris Distal Attachment

Answer 18

Tibial tuberosity via the patellar ligament

Question 19

Rectus Femoris Innervation

Answer 19

Femoral n. [L2,L3,L4]

Question 20

Rectus Femoris Action

Answer 20

Flexes the hip

Extends the knee

Question 21

Vastus Medialis Proximal Attachment

Answer 21

Inter trochanteric line and medial lip of the linea aspera

Question 22

Vastus Medialis Distal Attachment

Answer 22

Tibial tuberosity via the patellar ligament

Question 23

Vastus Medialis Innervation

Answer 23

Femoral n. [L2,L3,L4]

Question 24

Vastus Medialis Action

Answer 24

Extends the knee

Question 25

Vastus Lateralis Proximal Attachment

Answer 25

Proximal 1/2 of lateral lip of the linea aspera

Question 26

Vastus Lateralis Distal Attachment

Answer 26

Tibial tuberosity via the patellar ligament

Question 27

Vastus Lateralis Innervation

Answer 27

Femoral n. [L2,*L3,*L4]

Question 28

Vastus Lateralis Action

Answer 28

Extends the knee

Question 29

Vastus Intermedius Proximal Attachment

Answer 29

Anterior and lateral surfaces of the proximal shaft of the femur

Question 30

Vastus Intermedius Distal Attachment

Answer 30

Tibial tuberosity via the patellar ligament

Question 31

Vastus Intermedius Innervation

Answer 31

Femoral n. [L2,*L3,*L4]

Question 32

Vastus Intermedius Action

Answer 32

Extends the knee