Posterior Abdominal Wall

Question 0

What are the unpaired visceral branches of the abdominal aorta?

Answer 0

Celiac trunk, superior mesenteric artery, and inferior mesenteric artery

Question 1

What are the paired visceral branches of the abdominal aorta?

Answer 1

Suprarenal, renal, and gonadal arteries

Question 3

What is the unpaired parietal branch of the abdominal aorta?

Answer 3

Median sacral artery

Question 4

Psoas major

Answer 4

Origin: transverse processes of lumbar vertebrae and sides of vertebral bodies T12-S1 and intervening discs

Insertion: lesser trochanter of the femur

Innervation: lumbar plexus via anterior branches of L2-L4 nerves

Action: flex thigh, laterally flex vertebral column, and flex trunk when sitting

Question 5

Iliacus

Answer 5

Origin: superior 2/3 of the iliac fossa, ala of sacrum, and sacroiliac ligament

Insertion: lesser trochanter of the femur, shaft inferior to it, and psoas major tendon

Innervation: femoral nerve (L2-L4)

Action: flex thigh and stabilize hip joint

Question 6

Quadratus lumborum

Answer 6

Origin: tips of transverse processes and medial half of inferior border of 12th rib

Insertion: iliolumbar ligament and internal lip of the iliac crest

Innervation: anterior branches of L1-L4 and T12

Action: extend and laterally flex the vertebral column and fixes 12th rib during inspiration

Question 7

What are the paired parietal branches of the abdominal aorta?

Answer 7

Inferior phrenic and lumbar arteries