Sievert ANS Flashcards
Parasym. associates with which vertebrae and cranial nerves?
S2-4, brainstem nuclei associated with Cranial nerves 3,7,9,10
Symp. associates with which vertebrae?
T1-L2, Lateral horn of grey matter
Explain the synaptic connections in the Parasym.
- between first (preganglionic) (CNS) and second (postganglionic) neurons
- between postganglionic neuron (Paravertebral/chain, pre vertebral/ aorta) and effector cell
The adrenal medulla only gets (blank)
sympathetics
(Blank) fibers can talk to the enteric nervous system cell bodies
pre-ganglionic parasympathetic
All (Blank) are cholinergic (both pre and post). (Blank) pre are cholinergic, post are adrenolergic. Except for skin. Skin is cholinergic.
1) parasympathetics
2) sympathetics
T or F: There are synapses in all autonomic ganglion
True
T or F: sensory nerves have a synapse
false
T or F: there are synapses in the DRG
FALSE
In divergence, if you stimulate preganglionic will have a (blank) effect. If you have convergence, will have a much more (Blank) effect.
1) huge
2) local
What are the possible routes for an afferent axon?
Their axon once going back to spinal cord can go locally for reflexes, up to higher centers for conscious awareness, or they could go up for regulating a pattern generator or regulating cardiovascular responses or something that you’re not privy to.
Where are the cell bodies for the autonomic system?
Cell bodies of autonomics (visceromotor) are in the lateral horn (intermediate gray) of very specific levels T1-L2 for sympathetics and S2-4 for para.
Where are the cell bodies for the somatomotor fibers?
Cell bodies of somatomotor fibers are in the ventral horn
(Blank) nerves go to the pelvic viscera and also to the abdominal cavity for descending colon.
Pelvic splanchnic
preganglionic has to leave spinal nerve, otherwise it would go to (blank)
body wall
In regards to the parasymp. and as far as the GI tract is concerned, second neuron is also part of the (Blank)
enteric nervous system
The parasymp. only innervates the…
Parasympathetic only innervates viscera in body cavities, glands in the head, the eye and erectile tissues. Do not travel on spinal nerves.
Describe path of sympathetic fibers.
1) originate in T1-L2, intermediate gray (lateral horn)
2) go through the ventral root, can synapse in two places.
3) In the sympathetic chain, which is paravertebral because they go down right alongside vertebral column, or they can synapse at prevertebral/preaortic ganglia.
4) Anything above diaphragm will synapse in chain via communicating rami before going to target. Anything under diaphragm goes to prevertebral ganglia to synapse, then goes to target (don’t synapse in chain).