Inn of pelvic viscera

Question 1

What are the origin levels of preganglionic sympatetic inn of reproductive organs, prostate, uterus, bladder, colon/rectum

Answer 1

repro- T10-L2
Prostate- T11-L1
Uterus- T12-L1
Bladder- T11-L2
Colon/rectum- L1-2

Question 2

What is the effect of sympathetic stim on pelvic viscera (inhibit/stim)

Answer 2

inhibits- blood flow to bladder, prostate, colon, rectum, ext gen

Stims- Int spinchters (decrease voiding)
Ejaculation

Question 3

Pathway of preganglionic sympathetic neurons when supplying pelvic viscera

Answer 3

leave lat horn thru ventral horns thru ventral root enter white communication in sympathetic chain and pass thru w/o synapsing to form splanchnic nerves

Question 4

Where will the splanchnic nerves from sympathetic inn of pelvic viscera synapse after passing thru chain

Answer 4

Synapse with post ganglionic sympathetic neurons in prevertebral ganglia (inf mesenteric, gonadal, superior hypogastric)

Question 5

What sympathetic ganglia + splanchnic n supply hind gut (descending colon, sigmoid, upper rectum)

Answer 5

Inf mesenteric ganglia

mostly upper lumbar splanchnic

Question 6

What sympathetic ganglia + splanchnic n supply gonads

Answer 6

Gonadal and inf mesenteric ganglia

Lesser, least and upper lumbar splanchnic

Question 7

What sympathetic ganglia + splanchnic n supply bladder, urethra, vag, uterus, prostate, seminal vesicles, vas deferens, lower rectum)

Answer 7

Superior hypogastric ganglia

lower lumbar splanchnic

Question 8

Where does preganglionic parasympathetic neurons for pelvic viscera originate and where do they synapse

Answer 8

S2-4 Pelvic splanchnic n

-Synapse with post ganglionic neurons in ganglia of plexuses on wall of effector organ (pre neurons are long)

Question 9

What is the only parasympathetic splanchnic n

Answer 9

Pelvic splanchnic n

Question 10

What does parasympathetic inn to pelvic viscera inhibit

Answer 10

Tone of int urethral + anal spinchters (promotes urination/defication)

Question 11

What does parasympathetic inn to pelvic viscera stim

Answer 11

increased blood flow to- colon, testes, uterus, penis/clit
Contraction of detrusor mm of bladder (promotes urination)
Glands of viscera

Question 12

All general visceral sensory afferents from pelvic viscera travel on what

Answer 12

Parasympathetic fibres (of pelvic splanchnic n)

Question 13

Visceral sensory afferents for pain from pelvic viscera covered/touched by peritoneum travel back with, compared to viscera deep to paratoneum

Answer 13

Covered/touched- sympathetics ( thracolumbar splanchnic T5-L2)

Deep- parasympathetics (S2-4)

Question 14

Inf mesenteric ganglia is of what type and how does it get its in

Answer 14

Mixed ganglia
Sympathetic from lumbar splanchnic ( from sup mesenteric ganglia)
parasymp from pelvic splanchnic

Question 15

What inn the upper and mid part of rectum and lower part

Answer 15

Upper/mid- thoracolumbar splanchnics (t5-L2) by inf mesenteric gangla

lower- S2-4, visceral afferents travel back on this parasympathetic path

Question 16

Sympathetic fibres to bladder cause

Answer 16

Vasocontriction of bladder wall
Supplies int urethral spinchter to contract
Supresses voiding

Question 17

What does somatic motor fibres to bladder cause + where from

Answer 17

Pudendal n

Supply ext urethral spinchter (contraction)

Question 18

What does parasympathetic fibres to bladder cause

Answer 18

inn the detrusser mm and inhibit internal urethral spinchter

-promotes voiding

Question 19

pain from sup wall of bladder travels on what compared to rest of bladder below

Answer 19

Sup- covered by peritoneum to travels withh sympathetics

Inf- travels with parasypathetics

Question 20

What is the sympathetic and para to reproductive organs

Answer 20

symp- t10-L2 vis thoracolumbar splanchnic

Para- s2-4 via pelvic splanchnic

Question 21

Pain from overies, uterine tubes and uterus travel with what

Answer 21

sympathetic

Question 22

Pain from cervix of uterus and vagina travel with

Answer 22

parasympathetic fibres

Question 23

Pain from testes, epididymis travel with what

Answer 23

sympathetic

Question 24

Pain from ductus deferens, seminal vesicles, prostate travel with what

Answer 24

parasympathetic

Question 25

What are the 3 steps of bustin and nerve pathways

Answer 25

1. Erection- parasympathetic (releases NO)
2. Ejaculation- sympathetic
3. Score- Somatic from pudendal (rythmic contractions)

Question 26

What are the 2 phases of ejaculation

Answer 26

1. Emission- smooth mm contract and send semen in urethra
2. Expulsion- rapid contraction of smooth mm around urethra + root of penis

followed by remission