Term
| What are the three cervical ganglia? Are there white/gray rami? |
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Definition
| superior, middle, inferior. No white/gray rami. |
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Term
| Where are they pulmonary plexi? Where do they get innervation from? |
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Definition
| They are on both sides of the hilums. They get innervation from being continuous with cardiac and esophageal plexuses. |
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Term
| What levels do the lungs receive sympathetic innervation from? What does this do? |
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Definition
| T1-4. Vasoconstrict and bronchodilate. Thoracic visceral nerves. |
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Term
| What is the parasympathetic innervation of the lung? Where does it come from and what does it do? |
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Definition
| Vagus. It comes from cardiac plexus and also from direct branches off (right and left) vagi posterior to root of lung. It vasodilates and bronchoconstricts. |
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Term
| Where does esophagus receive sympathetic innervation? What is the result? |
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Definition
| From thoracic sympathetic chain ganglia. This causes vasoconstriction. |
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Term
| Which trunk of which vagus goes on which side of the esophagus? Where does the vagus exit the diaphragm? |
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Definition
| Left vagus, anterior trunk; right vagus, posterior trunk. Vagus travels with esophagus at T10. |
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Term
| What does parasympathetic innervation of the esophagus do? |
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Definition
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Term
| What are root values of greater, lesser, and least thoracic splanchnics? |
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Definition
| T5-9 greater. T10-11 lesser. T12, least. |
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Term
| What type of viscera do thoracic splanchnics generally innervate? |
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Definition
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Term
| What is the longest part of the small bowel? |
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Definition
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Term
| What is one way of distinguishing what is peritoneal vs retroperitoneal? |
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Definition
| does it have a mesentery? |
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Term
| How do the thoracic splanchnics pass into the abdominal cavity? |
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Definition
| They go through the crura of the diaphragm. |
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Term
| Do parasympathetic fibers ever synapse in the celiac, superiormesenteric, aorticorenal, or inferiormesenteric ganglia? |
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Definition
| no, they synapse direct on target organ |
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Term
| What nerve synapses most of its fibers to the celiac ganglia? |
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Definition
| The greater thoracic splanchnic (T5-9) |
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Term
| Where does the lesser thoracic splanchnic synapse? How about the least? |
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Definition
| The lesser synapses aorticorenal. The least usually goes to a diffuse bunch of stuff in the renal area. |
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Term
| Where would you find the aorticorenal ganglia? |
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Definition
| Where the renals come off the aorta |
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Term
| Where does the vagal fibers end in terms of the aorta? |
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Definition
| Around the aorticorenal ganglia. This is why it does not give fibers to anything distal l. colic flexure. |
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Term
| How many lumbar splanchnics are there? What type of innervation are they, where do they synapse? |
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Definition
| There are L1, L2, l3, L4. They are sympathetic. They go into intermesenteric and inferiormesenteric, and superior hypogastric plexuses |
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Term
| What is the main plexus of the pelvis? what fibers does it have? |
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Definition
| inferior hypogastric. para + sympath. like a big post office for the pelvis |
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Term
| Where do the sympathetics in the pelvis usually come from? |
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Definition
| They usually descend from the lumbar region into the inferior hypogastric plexus |
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Term
| Where does the IMLCC run from? |
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Definition
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Term
| What nerves convey sympathetic innervation from the superior hypogastric plexus deeper into the pelvis into the inferior hypogastric plexus? |
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Definition
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Term
| What are the sacral splanchnic nerves? |
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Definition
| These are postsynaptic SYMPATHETIC nerves that come off the sympathetic chain and contribute in a small way to the inferior hypogastric plexus |
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Term
| Are most sympathetic fibers pre or post synaptic in the pelvis? |
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Definition
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Term
| What innervates internal anal sphincter? |
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Definition
| inferior hypogastric plexus. This is autonomic. Autonomic keeps it shut. |
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Term
| What innervates external anal sphincter? |
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Definition
| Inferior rectal branch of internal pudendal. This is somatic. |
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Term
| The internal sphincter of the bladder is innervated by what and what do these signals do? |
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Definition
| So it is autonomic. The pelvic splanchnics relax it and contract the bladder so you pee. The sympathetics from the superior hypogastric plexus tighten the internal sphincter of the bladder. |
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Term
| What muscle is involved with contracting the bladder walls? |
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Definition
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Term
| Does the pudendal nerve carry parasympathetic fibers? |
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Definition
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Term
| Where does sympathetic innervation to the female genital organs come from? |
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Definition
| Well, lower thoracic spinal nerves to sympathetic chain to lumbar splanchnics superior hypogastric plexus to uterovaginal plexus. |
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Term
| Where does parasympathetic innervation of the female genital organs come from? |
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Definition
| Pelvic splanchnics s2-4, with fibers passing through inferior hypogastric plexus into uterovaginal plexus |
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Term
| What is prostatic autonomic stimulation? |
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Definition
| The prostatic plexus gets innervation from pelvic splanchnics and from the superior hypogastric plexus (sympathetic). The parasympathetic controls erection because they travel on to the corpora cavernosa. The sympathetic is involved in orgasm and also goes on to vasoconstrict the penis to subside erection. |
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