Anterior Thigh

Question 0

Iliopsoas: Psoas major

Answer 0

O: sides of T12-L5 vertebrae and disks, transverse processes of all vertebrae
I: lesser trochanter of femur
N: anterior rami of lumbar nerves (L1-3)
V: lumbar branch of iliolumbar a.
A: flex thigh at hip joint, stabilize joint

Question 1

Pectineus

Answer 1

O: superior ramus of pubis
I: pectineal line o f femur
N: femoral n. (L2,3) [may receive from obturator n]
V: medial femoral circumflex & obturator aa.
A: adducts and flexes thigh/assists medial rotation

Question 2

Psoas minor

Answer 2

O: sides of T12-L1 vertebrae & intervertebral disks
I: pectineal line, iliopectineal eminence via iliopectineal arch
N: anterior rami of lumbar n. (L1,2)
V: lumbar branch of iliolumbar a.
A: flexes thigh at hip joint, stabilizes joint

Question 3

Iliacus

Answer 3

O: iliac crest, iliac fossa, ala of sacrum, & anterior sacro-iliac ligaments
I: tendon of Psoas major, lesser trochanter, & femur distal to it
N: femoral n (L2,3)
V: iliac branches of iliolumbar & superior gluteal aa.
A: flexes thigh at hip joint, stabilizes joint

Question 4

Sartorius

Answer 4

O: anterior superior iliac spine & superior part of notch inferior to it
I: superior part of medial surface of tibia
N: femoral n (L2,3)
V: superficial & deep circumflex iliac, muscular branches of femoral, descending genicular & superior medial genicular
A: flex, abduct, & laterally rotates thigh at hip joint/ flex leg at knee joint (medial rotation when knee flexed)

Question 5

Rectus femoris

Answer 5

O: anterior inferior iliac spine & ilium superior to acetabulum
I: via common tendinous & independent attachments to base of patella/indirectly via patellar ligament to tibial tuberosity
N: femoral n. (L2-4)
V: lateral circumflex femoral and its descending aa.
A: extend leg at knee joint, stabilizes hip joint, helps iliopsoas flex thigh

Question 6

Vastus lateralis

Answer 6

O: greater trochanter & lateral lip of linea aspera of femur
I: via common tendinous & independent attachments to base of patella/indirectly via patellar ligament to tibial tuberosity/tibia and patella via aponeurosis
N: femoral n. (L2-4)
V: circumflex femoral a. & descending branch
A: extend leg at knee joint, stabilizes hip joint, helps iliopsoas flex thigh

Question 7

Vastus medialus

Answer 7

O: intertrochanteric line & medial lip of linea aspera of femur
I: via common tendinous & independent attachments to base of patella/indirectly via patellar ligament to tibial tuberosity/tibia and patella via aponeurosis
N: femoral n. (L2-4)
V: lateral circumflex femoral a. & descending branch
A: extend leg at knee joint, stabilizes hip joint, helps iliopsoas flex thigh

Question 8

Vastus intermedius

Answer 8

O: anterior and lateral surfaces of shaft of femur
I: via common tendinous & independent attachments to base of patella/indirectly via patellar ligament to tibial tuberosity
N: femoral n. (L2-4)
V: lateral femoral circumflex a. & descending branch
A: extend leg at knee joint, stabilizes hip joint, helps iliopsoas flex thigh