Pelvic Autonomic Nerves

Question 1

What does the sympathetic system in the pelvis consist of?

Answer 1

sacral sympathetic trunk including the ganglion impar

Question 2

How many ganglia usually comprises the sacral sym trunk?

Answer 2

4

Question 3

The sacral sym trunk is an _______ continuation of lumbar sym trunk

Answer 3

inferior

Question 4

What is the ganglion impar?

Answer 4

small, median convergence of sacral symp trunks, located anterior to the coccyx

Question 5

What connects the sacral trunk to the sacral/coccygeal ventral rami?

Answer 5

grey rami communicantes

Question 6

What is the function of the sacral symp trunk?

Answer 6

postsynaptic sym innervation to lower limbs - vasomotor, sudomotor, pilomotor

Question 7

What splanchnic nerve comprises the parasym system in the pelvis?

Answer 7

pelvic splanchnic nerve

Question 8

Pelvis splanchnic nerve contain presynaptic neurons from what spinal cord segments?

Answer 8

S2-S4

Question 9

the pelvic splanchnic nerve provides motor innervation to muscles of?

Answer 9

urinary bladder and rectum

Question 10

What nerve/system is responsible for producing erection in penis/clitoris?

Answer 10

pelvic splanchnic nerve

Question 11

the pelvic splanchnic n contain visceral afferents that may refer pain to what level?

Answer 11

S2-4 dermatomes

Question 12

T/F: The pelvic splanchnic n provides visceral afferent path for pelvic, adbominal/thoracic organs?

Answer 12

false:

visceral afferent path for most pelvic organs but the visceral afferents from ab/thoracic organs follow sympathetics

Question 13

Where does the superior hypogastric plexus lie?

Answer 13

just inferior to bifurcation of abdominal aorta

Question 14

Superior hypogastric plexus: sympathetic from?

Answer 14

lumbar splanchnic n - function vasomotor

Question 15

is there parasym contribution to superior hypogastric plexus?

Answer 15

yes, minimal but via pelvic splanchnic n

Question 16

What does the R/L hypogastric n do?

Answer 16

connect superior and inferior hypogastric plexi

Question 17

Hypogastric n - sym pass inferiorly to join with?

Answer 17

inferior hypogastric plexus

Question 18

hypogastric n - parasym pass superiorly to join with?

Answer 18

superior hypogastric plexus

Question 19

The inferior hypogastric plexus is a convergence of what ?

Answer 19

hypogastric and pelvic splanchnic n

Question 20

Where is the inferior hypogastric n located?

Answer 20

between internal iliac AV, lateral to rectum, vagina and urinary bladder

Question 21

Does the inferior hypogastric plexus follow branches of internal iliac a to pelvic viscera?

Answer 21

Yes

Question 22

In males what does the inferior hypogastric plexus innervate?

Answer 22

prostate, seminal vesicles, penile erectile tissue

Question 23

In females what does the inferior hypogastric plexus innervate?

Answer 23

ovary, uterine tube, uterus, vagina, clitoral erectile tissue

Question 24

In both sexes what does the inferior hypogastric plexus innervate?

Answer 24

rectum and urinary bladder