Inn of pelvic viscera Flashcards
What are the origin levels of preganglionic sympatetic inn of reproductive organs, prostate, uterus, bladder, colon/rectum
repro- T10-L2 Prostate- T11-L1 Uterus- T12-L1 Bladder- T11-L2 Colon/rectum- L1-2
What is the effect of sympathetic stim on pelvic viscera (inhibit/stim)
inhibits- blood flow to bladder, prostate, colon, rectum, ext gen
Stims- Int spinchters (decrease voiding)
Ejaculation
Pathway of preganglionic sympathetic neurons when supplying pelvic viscera
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
Where will the splanchnic nerves from sympathetic inn of pelvic viscera synapse after passing thru chain
Synapse with post ganglionic sympathetic neurons in prevertebral ganglia (inf mesenteric, gonadal, superior hypogastric)
What sympathetic ganglia + splanchnic n supply hind gut (descending colon, sigmoid, upper rectum)
Inf mesenteric ganglia
mostly upper lumbar splanchnic
What sympathetic ganglia + splanchnic n supply gonads
Gonadal and inf mesenteric ganglia
Lesser, least and upper lumbar splanchnic
What sympathetic ganglia + splanchnic n supply bladder, urethra, vag, uterus, prostate, seminal vesicles, vas deferens, lower rectum)
Superior hypogastric ganglia
lower lumbar splanchnic
Where does preganglionic parasympathetic neurons for pelvic viscera originate and where do they synapse
S2-4 Pelvic splanchnic n
-Synapse with post ganglionic neurons in ganglia of plexuses on wall of effector organ (pre neurons are long)
What is the only parasympathetic splanchnic n
Pelvic splanchnic n
What does parasympathetic inn to pelvic viscera inhibit
Tone of int urethral + anal spinchters (promotes urination/defication)
What does parasympathetic inn to pelvic viscera stim
increased blood flow to- colon, testes, uterus, penis/clit
Contraction of detrusor mm of bladder (promotes urination)
Glands of viscera
All general visceral sensory afferents from pelvic viscera travel on what
Parasympathetic fibres (of pelvic splanchnic n)
Visceral sensory afferents for pain from pelvic viscera covered/touched by peritoneum travel back with, compared to viscera deep to paratoneum
Covered/touched- sympathetics ( thracolumbar splanchnic T5-L2)
Deep- parasympathetics (S2-4)
Inf mesenteric ganglia is of what type and how does it get its in
Mixed ganglia
Sympathetic from lumbar splanchnic ( from sup mesenteric ganglia)
parasymp from pelvic splanchnic
What inn the upper and mid part of rectum and lower part
Upper/mid- thoracolumbar splanchnics (t5-L2) by inf mesenteric gangla
lower- S2-4, visceral afferents travel back on this parasympathetic path
Sympathetic fibres to bladder cause
Vasocontriction of bladder wall
Supplies int urethral spinchter to contract
Supresses voiding
What does somatic motor fibres to bladder cause + where from
Pudendal n
Supply ext urethral spinchter (contraction)
What does parasympathetic fibres to bladder cause
inn the detrusser mm and inhibit internal urethral spinchter
-promotes voiding
pain from sup wall of bladder travels on what compared to rest of bladder below
Sup- covered by peritoneum to travels withh sympathetics
Inf- travels with parasypathetics
What is the sympathetic and para to reproductive organs
symp- t10-L2 vis thoracolumbar splanchnic
Para- s2-4 via pelvic splanchnic
Pain from overies, uterine tubes and uterus travel with what
sympathetic
Pain from cervix of uterus and vagina travel with
parasympathetic fibres
Pain from testes, epididymis travel with what
sympathetic
Pain from ductus deferens, seminal vesicles, prostate travel with what
parasympathetic
