Autonomic Nervous System

Question 1

What nerves does autonomic information travel in from the superior and inferior salivatory nuclei?

Answer 1

Superior: VII

Inferior: IX

Question 2

What are the possible ganglia containing 2’ autonomic neurons, on which 1’ neurons from the intermediolateral cell column synapse?

Answer 2

• paravertebral ganglia (sympathetic chain)
• prevertebral ganglia (celiac, superior mesenteric, etc)
• Adrenal medulla

Question 3

What cranial nerve contains parasympathetic infromation from the nucleus ambiguus?

Answer 3

Vagus to heart

Question 4

Where do baroreceptor and chemoreceptor neurons from the aorta and atria synapse in the brainstem?

Answer 4

-Nucleus tractus solitarius

Question 5

Where does baroreceptor information in the nucleus tractus solitarius project to?

Answer 5

• Nucleus ambiguus –> Vagus –> heart muscle (inhibitory)
• Caudal ventrolateral medullary depressor area (CVLM) –>(inhibits) Rostral ventrolateral medullary pressory area (RVLM) –> Intermediolateral cell column –> Sympathetics to the vasculature and heart

Question 6

Where does baroreceptor information in the nucleus tractus solitarius project to?

Answer 6

(increase blood pressure)-RVLM –> IML–> sympathetics to blood vessels and heart

(bradycardia) NTS–> NucAmb–>Vagus–> Heart muscle

(Increased respiration) NTS–>rVRG (rostral ventral respiratory group) –>phrenic motor nucleus (C3,4,5) –>increase activity of diaphragm