Test 3 main muscles of posterior abdominal wall

Question 0

psoas major insertion

Answer 0

by strong tendon to lessor trochanter of femur

Question 1

psoas major origin

Answer 1

• transvere process of lumbar vertebrae

- sides of bodies of T12-S1 vertebrae and intervening IV discs

Question 2

psoas major innervation

Answer 2

lumbar plexus via anterior branches of nerves L2-L4

Question 3

psoas major action

Answer 3

• acting inferiorly with iliacus, flexes thigh
• acting superiorly , flexes vertebral column latterally to balance trunk
• when sitting, act inferiorly with iliacus to flex trunk

Question 4

iliacus origin

Answer 4

• superior 2/3 of iliac fossa
• ala of sacrum
• anterior sarco-iliac ligaments

Question 5

liacus insertion

Answer 5

• lesser trochnter of femur and shaft inferior to it

- psoas major tendon

Question 6

iliacus innervation

Answer 6

femoral nerve (L2-L4)

Question 7

iliacus action

Answer 7

• flexes thigh and stabilizes hip joint

- acts with psoas major

Question 8

quadratus lumborum origin

Answer 8

medial half of inferior border off 12th rib and tips of lumbar TP

Question 9

quadratus lumborum insertion

Answer 9

• iliolumbar ligament

- internal lip of iliac crest

Question 10

quadratus lumborum innervation

Answer 10

anterior branches of T12 and L1-L4

Question 11

quadratus lumborum action

Answer 11

• extends and laterally flexes vertebral column

- fixes 12th rib during inspiration