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22 Cards in this Set
- Front
- Back
General Autonomic Function
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regulation of internal environment, maintain normal body functions. Vegetative, Visceral nervous system
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Autonomic Innervations
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Glands, smooth muscle, cardiac muscle
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Tissue types innervated by ANS
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Digestive, blood vessels, heart, sweat/salivary glands, respiratory airways (smooth muscl.), eye pupils, adrenal glands.
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ANS divisions
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Parasympathetic; Craniosaccral
Sympathetic; thoracolumbar T1-L2,3 |
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Sympathetic ANS
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Responds w/ full capacity and mobilization of all resources in an emergency; flight or fight;
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Parasympathetic ANS
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Rest and Repose; decreased heart rate, increased digestion (dont need to save your big mac anymore)
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Autonomic Efferents
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A 2-ganglion chain of preganglionic in CNS, and postganglionic outside of CNS.
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Sympathetic Nervous System neuron chain
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-Long preganglionic cell in spinal cord, T1-L2.
-Short postganglionic cell outside of CNS |
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Two types of sympathetic postganglionic chains
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1. located in paravertebral ganglia (sympathetic trunk)
2. located in prevertebral ganglia |
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sympathetic trunk
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the collection of paravertebral ganglia which form a chain of paired ganglia on either side of the vertebral column. long preganglionic sympathetic cells from the spinal nerves T1-L2 synapse here, and then proceed to one of 3 options
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Prevertebral ganglia
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ganglia located anterior to the vertebral column. 3 pairs exist: superior/inferior mesenteric, and celiac.
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1st option for the sympathetic nervous system pathway
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Short Preganglionic neuron can:
1. Synapse w/ postganglionic neuron at the same segment from which the gray/white communicants emerged from |
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2nd option for sympathetic nervous system pathway
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Preganglionic neuron can:
Emerge from segment from which the collaterals emerged, then pass up/down the sympathetic trunk and synapse with postganglionic neuron at another segment |
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3rd option for sympathetic nervous system pathway
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pass right through paravertebral ganglion and synapse at one of the three prevertebral ganglia.
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Parasympathetic preganglionic fiber locations
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In cranium, brain regions that give rise to C.N. 3, 7, 9, and 10. In saccrum, S2-S4.
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Parasympathetic cranial postganglia locations
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Ciliary Ganglion
Pterygopalatine ganglion Submandibular Ganglion Otic Ganglion |
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Ciliary Ganglion
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where C.N. III (oculomotor nerve)'s parasympathetic preganglionic fibers synapse with postganglionic fibers. they then innervate the ciliary fibers and muscles of the eye, causing visual control.
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Pterygopalatine Ganglion
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Cranial ganglion where parasympathetic preganglionic cells synapse with postganglionic fibers of C.N. VII (Facial Nerve) for lacrimal gland tear production and nasal/oral cavity glandular production.
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Submandibular ganglion
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Preganglionic parasympathetic fibers of C.N. VII (Facial Nerve) synapse with postganglionic fibers which prompt saliva production from submandibular and sublingual salivary glands.
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Otic Ganglion
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Where preganglionic parasympathetic fibers from C.N. IX (glossopharyngeal nerve) synapse with postganglionic fibers which innervate and prompt saliva production from the parotid salivary gland.
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terminal ganglia
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where preganglionic parasympathetic fibers from C.N. X (Vagus) and pelvic nerves S2-S4 synapse with postganglionic short fibers which innervate organs within close proximity.
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Parasympathetic nerve pathway
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Long Preganglionic
Short Postganglionic Postganglionic fibers are generally within close proximity of the organs/glands/muscles they innervate. |