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20 Cards in this Set
- Front
- Back
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What is the bifurcation of the nerves just below the aortic bifurcation?
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Superior hypogastric plexus
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What are the three plexuses that branch off from the pelvic plexus in females?
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vesical, uterovaginal, rectal
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What are the three plexuses that branch off from the pelvic plexus in males?
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vesical, prostatic, deferential, rectal
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What three types of nerve fibers are found in the superior hypogastric plexus?
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visceral motor sympathetic fibers, visceral sensory fibers, visceral motor parasympathetic fibers
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What is the lateral extension of the SHG, providing branches to the sigmoid colon and descending colon?
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Hypogastric nerve
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What is formed by the union of the hypogastric, pelvic splanchnic, and sacral splanchnic nerves?
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Pelvic plexus (or Inferior hypogastric plexus)
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Where do the pelvic splanchnic nerves arise from? What fiber type do they carry?
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S2-S4; parasympathetic fibers
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What are the parasympathetic nerves in the penis called?
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Cavernous nerves
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What nerve arises with the pelvic splanchnic nerves and innervates skeletal muscles and the perineum?
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Pudendal nerve
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Which sympathetic nerves innervate the bladder? Parasympathetic?
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Hypogastric nerves and sacral splanchnic;
Pelvic splanchnic nerves (S2-S4) |
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What sympathetic nerves innervate the testis? Parasympathetic?
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T10-T11 (testicular plexus); Vagus (X)
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What sympathetic nerves innervate the male reproductive organs? Parasympathetic?
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Hypogastric and sacral splanchnic nerves (pelvic plexus);
Pelvic splanchnic nerves (nervi erigentes) |
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Which type of nerves allow for erections? Ejaculation?
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Parasympathetic; sympathetic (point and shoot)
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Why doesn't urine exit with sperm during ejaculation?
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Internal sphincter of bladder contracts (sympathetic contraction of smooth muscle)
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What sympathetic nerves innervate the ovary? Parasympathetic?
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Ovarian plexus (T10-T11); Vagus (X)
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What sympathetic nerves innervate the female productive organs? Parasympathetic?
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Hypogastric and sacral splanchnic at pelvic plexus; pelvic splanchnic nerves
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What sympathetic nerves innervate the rectum? Parasympathetic?
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Lumbar splanchnic at the inferior mesenteric ganglion; pelvic splanchnic nerves
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What general nerves signal that defection should occur?
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Visceral sensory (S2-S4) and general sensory of inferior rectal nerve
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What muscles are contracted or relaxed for defecation to occur?
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Contraction-thoracic and pelvic diaphragms; Relaxation-puborectalis muscle + both anal sphincters
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Generally, what do the parasympathetic nerves cause to happen to sphincters?
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Relax them
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