Nervous System

Question 1

What are the autonomic origins in the CNS?

Answer 1

parasympathetic (craniosacral = S2-S4)
sympathetic (thorocolumbar = T1-L2)

Question 2

How do the nerves travel?

Answer 2

preganglion neuron (white rami)
ganglion – sympathetic trunk
postganglion neuron (grey rami)

Question 3

How does the sympathetic nervous system travel?

Answer 3

1) synapse at entry (paravertebral ganglion)
2) synapse above/below entry (C1-L3)
3) synapse at prevertebral ganglion (abdominopelvic)
4) synapse onto adrenal medulla cells

Question 3

How is there sympathetic innervation in the head?

Answer 3

• preganglion fibers synapse in superior cervical ganglion
• postganglion fibers travel along carotid artery

Question 4

How is there sympathetic innervation of thoracic and cervical viscera?

Answer 4

T1-T5 innervate heart/lungs

Question 5

How does the parasympathetic nervous system travel?

Answer 5

CN III - oculomotor nerve (parasympathetic ganglia)
CN VII - facial nerve
CN IX - glossopharyngeal nerve
CN X - vagus nerve –> thoracic visceral, digestive

parasympathetic fibers in pelvis (bladder/genitals)