Somatic fibers
Skin, skeletal muscles, bones, joints
Visceral fibers
Blood vessels, glands, viscera
Ganglion
Cluster of neurosomas outside of CNS
Cervical nerves
C1-C8
Thoracic nerves
T1-T12
Lumbar nerves
L1-L5
Sacral nerves
S1-S5
Coccygeal nerve
Co1
Posterior root
Sensory input to spinal cord
Contains neurosomas of sensory neurons carrying signals to spinal cord
Anterior root
Motor output out of spinal cord
Spinal tap happens
L3-L4 or L4-L5