Autonomic Nervous System

Question 1

Function of PSNS

Answer 1

Homeostasis and conservation of energy

Question 2

Location of PSNS presynaptic somas?

Answer 2

Parasympathetic nuclei in brainstem

-S2-S4

Question 3

Location of PSNS postsynaptic somas?

Answer 3

Intrinsic (enteric) ganglia

Question 4

From the brainstem how do the neurons reach their targets?

Answer 4

4 Cranial Nerves: 
CN III oculomotor
CN VII Facial 
CN IX Glossopharyngeal
CN X Vagus

Question 5

Sacral spinal cord travel through?

Answer 5

Pelvic splanchnic nerve

Question 6

Neurotransmitter always is?

Answer 6

Acetylcholine, so all receptors are cholinergic

• Postsynaptic receptors are excitatory
• Target organ - Excitatory or inhibitory

Question 7

CN III Oculomotor

Answer 7

Pupillary sphincter (pupil constriction)
Ciliary muscles (accomodation)

Question 8

CN VII Facial

Answer 8

Lacrimal Gland (tears)
Salivary glands

Question 9

CN IX Glossopharyngeal

Answer 9

Salivary glands

Question 10

CN X Vagus

Answer 10

Smooth and cardiac muscle of thorax and abdomen

Question 11

What controls vital functions and are in turn modulated by the hypothalamus, thalamus and limbic system?

Answer 11

Medulla and Pons

Question 12

What carries higher level input to brainstem and spinal cord?

Answer 12

Descending tracts

Question 13

What is the limbic system?

Answer 13

Cerebral regions associated with emotions, mood and motivation

Question 14

What are the autonomic effects as a result of emotion?

Answer 14

Blushing
Heart rate change
Crying