The document discusses the autonomic nervous system, specifically the sympathetic nervous system. It describes the locations of the sympathetic trunk and ganglia in the thoracolumbar region from T1 to L2. It also discusses the cervical ganglia, splanchnic nerves arising from the thoracic sympathetic trunk, and that the splanchnic nerves carry preganglionic sympathetic fibers except for the pelvic splanchnic nerves which carry parasympathetic fibers. The document is intended to teach about the anatomy and pathways of the autonomic nervous system.

1. AUTONOMIC
NERVOUS SYSTEM
(INTRODUCTION)

2. HELLO!
Dr. Paparaj Subbanna
MBBS,MS
I am here because I love to TEACH.
You can find me at:
drpaprajs@gmail.com

4. SYMPATHETIC NERVOUS SYSTEM
○ Thoracolumbar regions (T1 to L2)
○ Paravertebral sympathetic trunk attached to anterior
rami of spinal nerves
○ Supply periphery & all viscera
○ GANGLION IMPAR

12. CERVICAL GANLION
○ Superior formed by fusion of upper 4 cervical Ganglia
○ Middle by 5th and 6th
○ Inferior by joining of 7th and 8th cervical ganglia
○ Inferior cervical and first Thoracic fuse to form a
Cervico-Thoracic or Stellate Ganglia

15. SPLANCHNIC NERVES
○ Splanchnic nerves are bilateral visceral autonomic
nerves.
○ The thoracic, lumbar and sacral splanchnic nerves are
sympathetic in function while the pelvic splanchnic
nerves are parasympathetic.

16. ○ The 3 splanchnic nerves of the thoracic sympathetic trunk,
arise from the lower 8 ganglia.
○ Greater splanchnic nerve: branches of the T5–9
sympathetic ganglia,
○ Lesser splanchnic nerve: T10–11 ganglia
○ Least splanchnic nerve: T12 ganglion.
○ These splanchnic nerves contain, predominantly, visceral
efferent fibres, as well as pain conducting visceral afferent
fibres

17. ○ All splanchnic nerves carry preganglionic
(presynaptic) sympathetic fibers except for the pelvic
splanchnic nerves that carry preganglionic
parasympathetic fibers.
○ The lumbar splanchnic nerve, one on each side of the
body, arises from the upper two ganglia of the lumbar
part of the sympathetic chain (L1&L2

21. THANKS!
Any questions?
You can find me at:
drpaprajs@icloud.com
drpaprajs@gmail.com