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Autonomic Nervous System PowerPoint Presentation

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Description : Check out this medical presentation on Neurology, which is titled "Autonomic Nervous System", to know how the Autonomic Nervous System (Enteric System, Sympathetic Nervous System, and Parasympathetic Nervous System).

Tags : Neurology, Autonomic Nervous System, Enteric System, Sympathetic Nervous System, Parasympathetic Nervous System

Published on : Aug 29, 2021 | Views : 1919 | Downloads : 3

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Slide 1-

Autonomic Nervous System Medical Neuroscience Dr. Wiegand
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Autonomic Nervous System Enteric System Sympathetic Nervous System Parasympathetic Nervous System All systems have GVE and GVA components Primarily considered a two neuron chain motor system
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Autonomic Nervous System
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Skeletal vs. Smooth Muscle Motor Systems
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PSNS & SNS – Similarities
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PSNS & SNS – Differences SNS activate body thoracolumbar (T1-L2) short preganglionic/long postganglionic fibers global responses postganglionic transmitter: norepinephrine (except sweat glands – ACH) PSNS prepare body for rest craniosacral (CN III, VII, IX, X & S2-4) long preganglionics/short postganglionic fibers discrete/local responses postganglionic transmitter: acetylcholine
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Sympathetic Nervous System “Fight or Flight” system Activation increases heart rate increases sweating dilates pupil inhibits GI movement closes sphincters diverts blood from skin and GI tract to skeletal muscles
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Sympathetic Nervous System- Preganglionic Neuron May: terminate on postganglionic neuron in the sympathetic chain ganglia ascend or descend to higher or lower ganglia and terminate on postganglionic neuron in the sympathetic chain ganglia pass through the sympathetic chain to prevertebral ganglia (celiac, inferior or superior mesenteric) pass through the sympathetic chain ganglia to adrenal medulla
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referred pain heart – T1-4 gall bladder – T6-8 stomach – T7-8
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preganglionic fibers from T1-5 ascend postganglionic fibers from sup. cervical ganglia follow carotid a. fibers follow III and V ophthalmic innervate dilator m, levator palpebrae, sweat & lacrimal glands
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Parasympathetic Nervous System prepares body for rest promotes digestion, GI peristalsis slows heart rate constricts pupil empties bladder relaxes sphincters mediates genital erection
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Horner’s Syndrome damage to the descending fibers from the hypothalamus or the superior cervical ganglia miosis – pupillary constriction anhidrosis – lack of sweating ptosis – drooping of the eye lid enophthalmos – eye appears to sink in to the orbit
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Bladder SNS – retention PSNS – voiding (micturation)
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L1 – L2 GVE S2 – S4 GSE S2 – S4 GVE SNS input from L1-2 (int. urinary sphincter) PSNS input from S2-4 (detrusor mm) GSE (Onuf) to ext. urinary sphincter GSA (pain, temp & pressure to T12/L1 & S2-4 GVA to S2-4 paracentral lobule & brainstem S2-4 GVA/GSA (T12/L1)
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Autonomic Nervous System and the Bladder “UMN bladder” = “spastic bladder” = automatic reflex bladder “LMN bladder” = “flaccid bladder” = “atonic bladder” = autonomous reflex bladder
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