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ANS, eye & brain

What is the ANS? a system of motor neurons that innervate smooth & cardiac muscle as well as glands of the body
What does the ANS regulate? visceral functions
ANS visceral functions - heart rate - BP - urination - digestion
Preganglionic neurotransmitter acetylcholine - cholinergic
sympathetic fight or flight
parasympathetic rest & digest
what is another name for sympathetics? thoracolumbar
where do sympathetics come from T1-L2 (lateral horn)
sympathetic postganglionic neurotransmitters? norepinephrine - adrenergic
what is another name for parasympathetics? craniosacral
parasympathetic postganglionic neurotransmitters? acetylcholine - cholinergic
parasympathetic cranial nerves III, VII, IX
what cranial nerves travel with CN V? III, VII, IX
innervation of CN III (oculomotor) smooth muscle of the eye - pupil constriction - lens buldge
where does the preganglionic neuron of CN III originate? accessory oculomotor nucleus in the midbrain
what is the postganglionic neuron of CN III? ciliary ganglion
where does the preganglionic neuron of CN VII originate? lacrimal gland - in the lacrimal nucleus in the pons salivary glands - in the superior salivary nucleus in the pons
where does the preganglionic neuron of CN IX originate? inferior salvatori nucleus in the medulla
what is the postganglionic neuron of CN VII? lacrimal gland - pterygopalatine ganglion salivary glands - submandibular ganglion
what is the postganglionic neuron of CN IX? otic ganglion
sacral outflow S2-S4
what does the sacral outflow carry? preganglionic parasympathetic fibers
what areas do parasympathetics have NO effect on? - sweat glnds - goose bumps - peripheral blood vessels (vasoconstriction)
paravertebral ganglia on both sides of the vertebral column - linked by chains
prevertebral ganglia not paired - only in abdomen or pelvis
preganglionic axons that go to the head T1-T4
preganglionic axons that go to thoracic organs T1-T6
preganglionic axons that go to abdominal organs T5-L2
preganglionic axons that go to pelvic organs T10-T12
parasympathetic stimulation of eye muscles pupillary constriction
sympathetic stimulation of eye muscles pupillary dilation
tensor tympani dampen sounds
stapedius stabilizes stapes
chordates tympani no function in middle ear
Created by: 2759503224076084



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