4.5 neuro - sympathetic nervous system

Question 1

what levels of the spinal cord have preganglionic neurons

Answer 1

T1-L2

Question 2

Explain the three pathwayas for preganglionic sympathetic axons

Answer 2

1. exit at spinal cord level, synapse in the PARAvertebral ganglia at the same level, (rejoin the spinal nerve), travel to target
2. exit at spinal cord level, ascend / descend within the sympathetic chain, synapse in a PARAvertebral ganglia and exit (rejoin the spinal nerve) at that level
3. exit at spinal cord level, enter and exit the sympathetic chain without synapsing, synapse in a PREvertebral sympathetic ganglia (ie become a splanchnic nerve), follow the blood vessels to target

Question 3

What is a splanchnic nerve

Answer 3

parasympathetic axon that exit at spinal cord level, enter and exit the sympathetic chain without synapsing, synapse in a PREvertebral sympathetic ganglia, follow the blood vessels to target

Question 4

Where are paravertebral ganglia

Answer 4

beside the vertebral column

Question 5

Where are prevertebral ganglia

Answer 5

anterior to the vertebral column

Question 6

Where along the spinal column are sympathetic ganglia found

Answer 6

from the carotid bifurcation to the pelvis