Posterior Division Of Internal Iliac Artery

Question 1

Posterior division

Answer 1

All are parietal

Question 2

Branches

Answer 2

1. Iliolumbar artery
2. Two lateral sacral arteries (superior and inferior)
3. Superior gluteal artery

Question 3

Iliolumbar artery course

Answer 3

Passes lateral in front of sacroiliac joint deep to psoas major

Question 4

Branches of iliolumbar artery

Answer 4

1. Iliac branch
2. Lumbar branch

Question 5

Iliac branch

Answer 5

1. Supplies iliacus
2. Shares in anastomosis around ASIS
3. Anastomoses with iliac branch of Obturator artery

Question 6

Lumbar branch

Answer 6

1. Supplies psoas major and quadratus lumborum
2. Anastomoses with 4th lumbar artery
3. Supplies cauda equina

Question 7

Sacral arteries

Answer 7

1. Each divides into 2 branches resulting in 4 arteries
2. Enter anterior sacral foramina to supply sacral canal contents
3. Emerge via posterior sacral foramina to supply overlying muscles and skin

Question 8

Superior gluteal artery

Answer 8

1. Largest branch of internal iliac artery and continuation of posterior division
2. Passes through greater sciatic foramen above piriformis
3. Enter gluteal region where it divides into superficial and deep branches