Autonomic NS Flashcards
Name the 5 splanchnic nerves of the sympathetic:
1) Greater Thoracic Splachnic Nerve
2) Lesser Thoracic Splanchnic Nerve
3) Least Thoracic Splanchnic Nerve
4) Lumbar Thoracic Splanchnic Nerve
5) Sacral Thoracic Splanchnic Nerve
Postganglionic sympathetic fiber pathway and what responses use this pathway.
Preganglionic axon goes out vertebral column, into white ramus communicantes, synapses within the paravertebral trunk, and leaves the paravertebral trunk as a nerve fiber to the effector organ. The heart, lungs, and head use this pathway.
Splanchnic Nerves
Preganglionic sympathetic fibers go into the white ramus communicantes, but do not synapse. They leave the paravertebral trunk to the prevertebral column where they synapse and then travel to the effector organ.
Adrenal Medulla parasympathetic pathway
The preganglionic neurons leave the vertebral column leave the
Name the 5 autonomic plexuses:
1) cardiac
2) pulmonary
3) esophageal
4) abdominoaortic
5) hypogastric
The sympathetic neurons travel where
in the lateral horn
from T1-L2
all preganglionic neurons aremyelinated
neurotransmitter: pre/acetylcholine ; post/norepinephrine
sympathetic have shorter preganglionic neurons and longer post sympathetic neurons.
Name the 4 parasympathetic cranial nerves, their associated ganglion, and their foramen?
1) CN III - occulomotor; ciliary ganglion; superior orbital fissure
2) CN VII - facial; submandibular and pterygopalatine ganglion; internal auditory meatus
3) CN IX - glossopharyngeal; otic ganglion; jugular foramen
4) CN X - vagus; no ganglion, innervates the cardiac, pulmonary, and esophageal plexuses; jugular foramen.
What are the nerves and the branches of the trigeminal?
V1: Supraorbital nerve/ophthalmic
V2: Infraorbital nerve/ maxillary
V3: Mental Nerve/mandibulary
Where is the sacral parasympathetic contribution?
S2-S4.
The cell bodies are in the lateral horn. The long preganglionic neuron leave the vertebral column where it will synapse. It then travels as the pelvic splanchnic nerve to its effector organ. (bladder and descending colon)
Where do the sympathetic splanchnics stop in the digestive system?
It ends at the right colic flexure and the parasympathetic starts at the right colic flexure to the descending colon.
what is an intramural neuron?
This is a parasympathetic presynaptic neuron that synapses right on the wall of the organ.
From what foramen does the CN II arise from?
CN II is the optic nerve and comes through the optic canal
From what foramen does CN I arise from?
CN I is the olfactory nerve and goes through the cribriform plate.
Sympathetic Spinal Nerve Pathway, and name a
Preganglionic synapses in the paravertebral trunk, exits via gray communicantes as a spinal nerve and travels to effector organ. Errector Pili in the skin uses this pathway for the fight or flight response.
