Pelvic Neurovasculature Flashcards
at what level does the abdominal aorta bifurcate
L4 into the Right and Left Common iliac arteries
what branches come off of the femoral artery
superficial circumflex iliac and superficial epigastric
where does the external iliac change names to become the femoral a/
once it crosses under the ingiunal ligament
what are the posterior branches of the internal iliac a.
- iliolumbar
- lateral sacral
- superior gluteal (largest)
the superior and inferior gluteal a. are named in reference to what muscle
piriformis m.
what artery branches of the internal iliac exit the pelvis through the greater sciatic foramen
- superior gluteal a.
- inferior gluteal a.
- internal pudenal a.
the iliolumbar a. supplies what region ?
medial ileum and L5
the lateral sacral a. supplies what region
sacrum
b/w what nerve roots would you find the superior gluteal a. ? inferior gluteal a.
- superior gluteal a. b/w L5 - S1
- inferior gluteal a. b/w S2-S3
what are the artery branches off the anterior root of the internal iliac in females ?
- umbilical a. which branches off mult. superior vesicle a.
- obturator a.
- inferior gluteal a.
- uterine a.
- internal pudenal a. which branches into middle rectal a. and vaginal a.
what are the artery branches of the anterior root of the internal ilac a. in males ?
- umbilical a. which branches off mult. superior vesicle a.
- obturator a.
- inferior gluteal a.
- internal pudenal a. which branches middle rectal a. and inferior vesicle a.
what does the uterine a. anastomose with in females
ovarian a. from the dorsal aorta
in females the ureter runs b/w what 2 arteries
runs below the uterine a. and on top of the vaginal a.
what does the internal pudenal a. supply
perineum, specifically the urogenital triangle and the anal triangle
what is the pudenal canal formed by
fascia of the obturator internus m.
the umbilical artery terminates as the ___ ?
medial umbilical ligament
what does the obturator a. supply
medial thigh
explain the Corona Mortis “crown of death”
b/w the anastomoses of obturator a. and inferior epigastric a.
- if this anastomoses is damaged both the external and internal iliac aa. are open = loss of aortic blood supply
- results in death in a few minutes
what are the 3 main venous drainage routes of the pelvis and perineum
- internal iliac vv.
- portal venous system
- pelvic venous plexus
T/F all venous plexus in the pelvic region have valves
F - all are valveless
what nerves aid in somatic innervation of the pelvis and perineum
- sciatic n.
- gluteal n.
- pudenal n.
what nerve roots contribute to making the pudenal n. for somatic innervation of the pelvis and perineum
S2-S4
what nerve roots contribute to form the sciatic and gluteal nn. for somatic innervation of the pelvis and perineum
L4-S3
where do the cell bodies originate for the sympathetic fibers that innervate the pelvis and perineum in the autonomic nervous system ?
T10-L2
where do the sympathetic fibers exit the pelvis in the autonomic nervous system ?
S2-S4
what is the name given to the sympathetic nerves of the autonomic plexus of the pelvis
sacral splanchnic nn.
what is the name given to the parasympathetic nerves of the autonomic plexus of the pelvis
pelvic splanchnic nn.
where do the cell bodies originate for the parasympathetic fibers that innervate the pelvis and perineum of the autonomic nervous system
S2-S4
the superior hypogastric plexus is where in reference to the aorta
anterior / covers it
what does the superior hypogastric plexus condense and bifurcate into
2 seperate hypogsatric nn.
what is the superior hyposgastric plexus made up of ?
- mostly sympathetic
- little parasympathetic (ascending pelvic splanchnic going to the hindgut)
what is the inferior hypogastric plexus made up of ?
sympathetic (sacral splanchnic) and parasympathetic (pelvic splanchnic) which join the hypogastric n.
what is the ganglion impar ?
termination of the pelvic sympathetic trunk plexus
what nerve can easily be damaged during rectal surgery of hysterectomy
sacral splanchnic (sympathetic) pelvic splanchnic (parasympathetic)
T/F Each organ of the abdominopelvic region shares lymphatic drainage pathways
F - each organ has its own lymph drainage pathway
how does lymphatics normally move in the abdominopelvic region
superficial to deep and superiorly
what is the exception to the normal flow of lymph in the abdominopelvic region
if it is below umbilicus, lymph moves
-inferiorly to inguinal, then deep to superiorly
what does the Right lymphatic duct drain
Right head, neck, upper limb and thorax
what does the thoracic duct drain
Left head, neck, upper b and thorax
-abdomen, pelvis, and lower limb
