Autonomic Nervous System Flashcards
what is the ANS composed of
visceral effect (motor) fibers
visceral afferent (sensory) fibers
what 2 divisions does the visceral motor innervation have
sympathetic and parasympathetic
sympathetic division is also called the
thoracolumbar division
what is the sympathetic division
fight or flight
innervated by T1-L2
what is the parasympathetic division also called
craniosacral division
what is the parasympathetic division
normal function, conserving energy
rest and digest
innervated by cranial and sacral portion
cranial origin postsynaptic fibers
cell bodies of postsynaptic neurons are in special ganglia in the head (orbits, nasal cavities)
cranial origin presynaptic fibers
cells bodies of presynaptic fibers are in brain nuclei of CN 3,7,9,10
where do the presynaptic fibers run in the cranial origin
in CN 3,7,9,10
sacral origin nerves
from spinal cord
S2-S4
where do the presynaptic fibers emerge in the sympathetic division
T1-L2
what is a presynaptic fiber in the sympathetic nervous system
short
what is a post synaptic fiber in the sympathetic division
long
