Autonomic Nervous System

Question 1

Where the pre-ganglionic axons found in the PSNS?

Answer 1

CN 3, 7, 9, 10

S2-S4

Question 2

Where are the sympathetic pre-ganglionic axons found?

Answer 2

T1-L2

Question 3

Where do sympathetic axons pass through to leave the spinal cord?

Answer 3

The white ramus

Question 4

Which segments have white rami and why?

Answer 4

T1-L2 because that is where pre-ganglionic SNS neurons are located and can only be sent from these segments. Grey rami are found in every segment because the SNS neurons leave the SCG from there

Question 5

What are three places SNS pre-ganglionic neurons can synapse?

Answer 5

Sympathetic chain ganglion and leave through grey ramus
Pre-vertebral ganglia
Adrenal medulla

Question 6

What happens when a SNS pre-ganglionic axon passes to the white ramus and leaves the grey ramus?

Answer 6

It synapses in the SCG

Question 7

What leads into the SCG and what exits it?

Answer 7

White rami

Grey rami

Question 8

What are the three pre-vertebral ganglion?

Answer 8

Celiac ganglion
Superior mesenteric ganglion
Inferior mesenteric ganglion