1. Med-Source
Anatomy — Nervous System Overview
http://med-source.blogspot.com/
parasympathetic
(rest & digest)
CNS
(brain & spinal cord)
PNS
(12 pairs of cranial nerves & 31 pairs
of spinal nerves: 8C, 12T, 5L, 5S, 1CC )
somatic NS
(voluntary)
o skeletal muscle
o 1 neuron pathway
(CNS target)
autonomic NS
(involuntary)
o smooth muscle
o glands
o cardiac muscle
CNS T1 — L2/3
ventral roots
ventral &
dorsal rami
white
rami
paravertebral
trunk ganglia
prevertebral
trunk ganglia
splachnic nerves
body wall
T1 — T4
viscera
superior to
diaphragm
cardiopulmonary
splachnic nerves
greater / lesser /
least & lumbar
splachnic nerves
T5 — L2
viscera
inferior to
diaphragm
CNS vagus* &
S2 — S4
* & other cranial nerves
viscera
organ
2 neuron pathways (CNS ganglion target)
gray
rami
all1
1
2
2
2
1
2
sympathetic
(fight or flight)