Autonomics of the Pelvis and Perineum

Question 1

plexus

Answer 1

contains both S and PS

Question 2

celiac plexus

Answer 2

foregut

Question 3

superior mesenteric plexus

Answer 3

to midgut

Question 4

suprarenal and renal plexus

Answer 4

to kidney, adrenals, ureters

Question 5

inferior mesenteric plexus

Answer 5

to hindgut

Question 6

superior hypogastric plexus

Answer 6

ureters

connects abdominal and pelvis plexuses

Question 7

inferior hypogastric plexus**

Answer 7

to pelvis

continuation of superior hypogastric plexus via hypogastric nerves

lateral surfaces of rectum and pelvic viscera

PS and S fibers

Question 8

sympathetic efferents to pelvis

Answer 8

vasoconstriction
contraction of sphincters
inhibition of peristalsis
inhibition of glandular secretions

Question 9

parasympathetic efferents to pelvis

Answer 9

vasodliation
peristalsis
contraction of detrusor muscle of bladder and myometrial muscle of uterus

Question 10

sensory fibers to pelvis

Answer 10

travel with both PS and S to return info about pain and distention to spinal cord

Question 11

subsidiary plexuses

Answer 11

carry fibers to viscera

rectal, vesicle, uterovaginal, prostatic

Question 12

plexuses contain

Answer 12

preganglionic PS fibers
pre and post sympathetic S fibers
prevertebral sympathetic ganglia

Question 13

splanchnic nerves

Answer 13

mainly preganglionic sympathetic
-greater, lesser, least, lumbar, sacral

• except cardiopulmonary - postgang sympathetic
• and pelvic - pregang parasympathetic

Question 14

cardiopulmonary splanchnic

Answer 14

postganglionic sympathetic

Question 15

pelvic splanchnic

Answer 15

preganglionic parasympathetic

Question 16

vagus

Answer 16

preganglionic parasympathetic

Question 17

splanchnics to inferior hypogastric plexus**

Answer 17

lumbar splanchnic
sacral splanchnic
pelvic splanchnic

Question 18

sympathetics to pelvis and pernineum

Answer 18

lumbar splanchnic
sacral splanchnic

preganglionic sympathetics

Question 19

parasympathetic to pelvis and perineum

Answer 19

pelvic splanchnic

preganglionic parasympathetic

Question 20

innervation to pelvis and perineum

Answer 20

superior hypogastric plexus - at aortic bifurcation
-travel as right and left hypogastric nerves

form inferior hypogastric plexus - lateral surfaces of viscera

Question 21

pelvic splanchnic nerves

Answer 21

parasympathetic

• preganglionic
• lateral horns S2,3,4
• exit at ventral root - to vental ramus

hindgut and pelvic viscera**

postganglionic in wall of organs they innervate

Question 22

lumbar splanchnic nerves

Answer 22

major route** of sympathetics to pelvis

preganglionic fibers T11-L2

ventral root to white ramus - pass sympathetic chain to prevertebral ganglia

inferior mesenteric and inferior hypogastric ganglia

Question 23

sacral splanchnic nerves

Answer 23

minor route** of sympathetics to pelvis

preganglionic fibers T12-L2

ventral root to white ramus - pass sympathetic chain to prevertebral ganglia

inferior hypogastric ganglia

Question 24

hypogastric nerves

Answer 24

major source of sympathetics from lumbar splanchnic nerves

if severed, problems

Question 25

lesion of sacral splanchnic nerves

Answer 25

only a minor route

Question 26

sacral splanchnic nerves

Answer 26

reach inferior hypogastric plexus via descending through sympathetic chain to pelvis

Question 27

sacral splanchnics

Answer 27

from sympathetic chain

Question 28

lumbar splanchnics

Answer 28

via hypogastric nerve

Question 29

pelvic splanchnics

Answer 29

from sacrum nerves

Question 30

cavernous nerves

Answer 30

parasympathetic to perineum -continuation of pelvic splanchnic nerves**

Question 31

pudendal nerve

Answer 31

sympathetic to perinuem -S2,3,4, postganglionic fibers