Topography of Autonomic Nervous System

Question 1

Where can autonomic fibres synapse?

Answer 1

1. Synapse in sympathetic chain at same level
2. Ascend
3. Descend
   NB: When ascending/descending, go up/down through sympathetic chain and then go into grey rami at different level
4. Traverse out (splanchnic nerve) - Synapse in Pre-vertebral ganglia

Question 2

What comes out from T1-T4

Answer 2

Cardiac Plexus through Cardiopulmonary splanchnic nerve

Question 3

What comes out from T4-T9

Answer 3

Greater thoracic nerve to Coeliac ganglia

Question 4

What comes out from T10-T11

Answer 4

Lesser thoracic nerve to Superior messenteric ganglia and Aorticorenal ganglia

Question 5

What comes out from T12

Answer 5

Least thoracic nerve to renal plexus

Question 6

What other splanchnic nerves are there

Answer 6

Lumbar splanchnic and Sacral splanchnic

Question 7

What are the targets of Lumbar and Sacral

Answer 7

IMP
Superior Hypogastric
Inferior Hypogastric