Parasympathetic and Sympathetic Flashcards
Autonomic Nervous System
Regulating activities of smooth muscle, cardiac muscle, and glands. Predominantly motor. Very little proprioreceptive
Somatic Nervous System
The portion of the Peripheral Nervous System that supplies the gross body Soma. Silhouette of our body
Conscious control of skeletal muscles - like a painful cramp and massaging it out.
Mixed Nerves - motor and sensory
Autonomic Nervous System Details
Subconscious Control of Visceral Activities - organs, glands, smooth, and cardiac
Predominantly Motor - When it fires, it will cause an action of some type of secretion of a gland or contraction of a muscle.
Predominantly controlled by Hypothalamus
Sympathetic Nervous System
Fight or Flight System Thoracal Lumbar Division;
Because of the Spinal Cord. Because the nerve roots comes out of T1 and L2. Travels out with normal spinal nerves but only in between those two. Ramps you up for an emergency
Parasympathetic System
Opposite of the Sympathetic System. Antithesis of the Sympathetic system.
Rest and Digest system. Rest and Repose system.
Known as the cranial Sacral. Fibers or nerves come off of the brain stem and cord levels S 2, 3, 4. Not vertebral levels but cord levels. Cord levels are higher.
Cranial Sacral Division
- Pupils
(P) Pupils will constrict
(S) Pupils will dilate
- Digestion/Glands
(P) Rest and Digestion Increase in secretion and blood supply
(S) decrease in secretion and blood supply to the digestive tract
- Smooth Muscle
(P) Increase in activity, increase in digestive tone
(S) decrease in activity, decrease in digestive muscle tone
- Digestion
(P) If everything is normal and relaxed digestion continues as it should, increase in contraction in the small intestines and stomach
(S) decrease in activity, decrease in activity for example like disney land, increase in adrenaline but decrease in gastric motility, won’t go to bathroom for day, decrease in movement of stuff through digestive tract, smooth muscle digestive tract
- Respiratory Passages
(P) Bronchial constriction
(S) Bronchial dilation
Gotta run away from something. Larger passage ways to bring in more air and out of the respiratory system
- Heart
(P) Decrease in heart rate
(S) Increase in heart rate with Force of Contraction for example running away from bear
- Skin Vessels
(P) No Innervation
(S) Constriction at skin vessel. Lots of blood vessel, divert blood from skin to skeletal muscles and the brain stem, so you could survive that event. Blushing is a sympathetic event. Evolved over time.
- Skeletal Muscle
(P) No Innervation
(S) Dilation to occur; More oxygen
Adrenal Glands
(P) No Neurotransmitters
(S) Release epinepherine and norepinepherine.
Sympathetic Nervous System
General Architect for Sympathetic Nervous System
Pre-ganglionic Fibers - Short and White - Myelinated
Synapses at Ganglion of Sympathetic Nervous System
Post-ganglionic Fibers - Long and Gray - Unmyelinated
Target Organ - Some type of effect
White Rami Communicans
From Spinal Nerve to Sympathetic cell body
Pre-ganglion fiber.
The fiber comes off of the spinal nerve to go to the ganglion and then back again
Gray Rami Communicans
From Ganglia Posteriorly
Post-ganglion fiber.
The fiber comes off of the ganglion back to spinal nerve
Autonomic Ganglia
Autonomic ganglia has a cell body and a synapse but dorsal root ganglion doesn’t
Autonomic ganglia is a motor, not a sensory cell body compared to dorsal root ganglia which is sensory
Parasympathetic Nervous System
General Parasympathetic Nervous System Architecture
Craniosacral Division S 2,3,4 or Brainstem
Long Pre-ganglion Fiber - White and Myelinated
Nerve Plexus
Synapse at Ganglion of Parasympathetic Nervous System
Post-ganglionic Fibers - Short and Gray - Unmyelinated
Target Organ - Some type of Effect
