COMMON ILIAC ARTERY
- Arise from the abdominal aorta bifurcation at the L4 level.
- They are left & Right common iliac artery. each divide into their terminal branches:
Abdominal aorta
- L4
- Right common iliac artery. → 1 cm longer than the left.
- medial aspect of psoas major muscle → between L5-S1
- External
- Internal.
- Left common iliac artery
- External
- Internal.
INTERNAL ILIAC ARTERY
IIA Branches
at superior margin of the greater sciatic foramen. → runs inferoposterioly
- Anterior trunk (towards the ischial spine) OMUU III
- Obturator a. Runs through the obturator canal.
- Anterior
- Posterior
- Pubic branch
- Acetabular branch
- Middle rectal a. S: Rectum
- Umbilical a.
- Superior vesical art.
- Vas deferens
- Inferior vesical a. (Vaginal a. in females)
- Internal Pudendal a.
- Inferior gluteal a.
- Uterine a. (female only)
- Posterior trunk (twords the greater sciatic foramen) ILS
- Iliolumbar a.
- iliac branch S: iliacus muscle Make anastmoses with iliac branches of obturator artery.
- Lumbar branch S: Psoas major + quadratus lumborum. Make " " the 4th lumbar artery.
- lateral sacral a.
- Superior
- Inferior
- superior gluteal a. leaves the pelvic cavity with the sup. gluteal nerve throug the greater sciatic foramen above the piriformis muscle
- In the gluteal region
- Superficial branch S: glutes maximus muscle
- Deep branch S: gluteus medius and minimus
make anastmose with the lateral and medial femoral circumflex arteries (from deep femoral a.) + with the inferior gluteal artery.