Pelvic Neurovasculature Flashcards
The abdominal aorta splits into what two arteries?
Common iliac aa.
The common iliac artery splits into what two arteries?
External and internal iliac aa.
The external iliac exits the pelvis as what artery?
Femoral aa.
The internal iliac artery enters the true pelvis and branches into how many anterior and posterior arteries?
3 posterior and 7 anterior
The internal iliac generally supplies what?
Pelvic organs and gluteal region
The medial sacral artery comes from what branch of arteries?
Comes from the bifurcation of the aorta into the common iliac aa.
Where is the physical location of the iliolumbar artery?
Between iliac crest and L5
What does the iliolumbar artery supply?
Medial ilium and L5
What foramina do the lateral sacral arteries enter?
Ventral sacral foramina
The lateral sacral arteries supply what?
Sacrum and ventral sacral nn.
The superior gluteal arteries are located between what vertebral levels?
L5 and S1
The superior gluteal m. enters the gluteal region superior to what muscle?
Piriformis m.
The superior gluteal artery supplies what?
Gluteal mm. with superior gluteal nn.
The superior gluteal artery exits what major foramen?
Greater sciatic
What is the first branch of the anterior trunk of the internal iliac artery?
Inferior gluteal artery
The inferior gluteal artery is located between what vertebral levels?
S2 and S3
Is the inferior gluteal artery located superior or inferior to the primiforis muscle?
Inferior
The inferior gluteal artery supplies what?
Gluteal mm. with inferior gluteal nn.
The internal pudendal artery exits the pelvis through what foramen?
Greater sciatic foramen
In respect to the primiforis muscle how does the internal pudendal artery enters the gluteal region?
Inferiomedial
The internal pudendal artery crosses over what major ligament?
Sacrospinous ligament
The internal pudendal artery reenters the pelvis via what foramen?
Lesser sciatic
The internal pudendal artery supplies what?
Urogenital and anal triangles
The pudendal canal contains what?
Internal pudendal artery and pudendal nerve
The pudendal canal is formed by what?
Facia of obturator internus m.
The obturator artery supplies what?
Medial thigh with obturator n.
How many superior vesical arteries are sent to the bladder?
3-4
What is the corona mortis?
This is an anastomoses between the obturator and inferior epigastric arteries
The uterine artery supplies what?
Uterus, cervix, and superior vaginal canal
Where does the ureter run in respect to the uterine artery?
Immediately below
The vaginal or inferior vesical arteries supply what?
In females: Inferior vagina, adjacent bladder, and rectum
In males: posterior inferior bladder, ureter, seminal vesicle, and prostate
The middle rectal artery supplies what?
Rectum
The middle rectal artery anastomoses with what?
Superior rectal from IMA and inferior rectal from internal pudendal
What is the veinous drainage of the pelvis?
Internal iliac vv.
The sacral plexus is innervated by what somatic nerves?
Sciatic, gluteal, and pudendal nn.
The sacral plexus L4 - L5 forms what?
Lumbosacral trunk and crosses over sacral ala
The sciatic nerve is formed from what spinal nerves?
L4-S3
The pudendal nerve is formed from what spinal nerves?
S2-S4
At what vertebral levels are the sympathetic fibers of the pelvis located?
T10-L2(3)
The superior hypogastric plexus covers what?
Bifurcation of aorta and upper sacrum
The superior hypogastric plexus condenses to form what?
2 hypogastric nn.
What serves as the main autonomic plexus of the pelvis?
Inferior hypogastric plexus
The right lymphatic duct drains what?
Drains right head and neck, right upper limb, and right upper thorax
The thoracic lymphatic duct drains what?
Left head and neck, left upper limb, remainder of thorax, abdomen, pelvis, and lower limbs
