unit 7: sacral PARA pathways

Question 1

S2-4 arise in the __ horns of S2-4 cord levels, are carried inferior in the __ __ and exit ANTERIOR sacral foramina via pelvic splanchnic nerves

Answer 1

lateral

cauda equina

Question 2

pelvic splanchnic nerves travel to the __ __ plexus and are distrib to pelvic organs
-plexus is a network of ganglia and nerves covering rectum, internal genitalia and base of urinary bladder

Answer 2

inferior hypogastric

Question 3

fibers reach distal part of digestive tract ( including distal colon) thru the inferior hypgastric plexus TO the __ __ and __ __ plexuses

Answer 3

superior hypogastric

inferior mesenteric

Question 4

postganglionic fibers to distal colon reach their target from the __ __ plexus

Answer 4

inferior mesenteric

Question 5

preganglionic rectum/anus fibers travel to the __ __ plexus, and postganglionic fibers reach their target from there

Answer 5

inferior hypogastric

Question 6

preganglionic urinary bladder fibers travel to the __ __ plexus, and postganglionic fibers reach the target (detrusor musc) from there

Answer 6

inferior hypogastric

Question 7

• PARA stim of urinary bladder will initiate ___ of the bladder
• somatic supply to __ __ ___ follows the sam pway; neurons are inhib as bladder empties

Answer 7

emptying

external urethral sphincter

Question 8

• to the prostate gland and seminal vesicle, PREganglionic fibers reach the ___ plexus via the inferior hypogastric plexus
• POSTganglionic fibers reach smooth musc of the __ __ and __ ___

Answer 8

prostatic
prostatic urethra
seminal vesicle

Question 9

to the uterus, PREganglionic fibers travel to the __ __ plexus, while POSTganglionic fibers are distrib throughout the ___ of the uterus

Answer 9

inferior hypogastric

myometrium

Question 10

___ stim of uterus most likely inhib the muscles, but hormonal factors prob play a larger role (preg)

Answer 10

PARAsympathetic

Question 11

• to the vagina, preganglionic fibers synapse in the __ plexus (via the inf hypogastric)
• fibers to the INFERIOR part of vagina may use __ nerve to reach it

Answer 11

vaginal

pudendal

Question 12

PARA stim of vagina results in ___ and increased __ activity at the target

Answer 12

vasodilation

secretory

Question 13

to the penis/clitoris, preganglionic fibers travel to the ___ plexus (via inferior hypogastric)

Answer 13

cavernous

Question 14

parasympathetic activity to penis/clitoris results in __ and filling of sinuses of erectile tissue

Answer 14

vasodilation