autonomic nervous system of head Flashcards
autonomic is divided into:
parasympathetic
sympathetic
T1-L2 is the _____ NS
sympathetic
CN III, VII, IX, X and S2-24 are the ______ NS
parasympathetic (cranio saccral)
what are the autonomic plexuses?
cardiac pulmonary esophageal celiac mesenteric hypogastric
the autonomic nervous system is a _____ neuron system
2 neuron
has presynaptic and postsynaptic and they synapse with autonomic ganglion
outflow name of parasympathetic
cranial sacral
outflow name of sympathetic
thoracolumnar
preganglionic cell body location of parasympathetic
brainstem nuclei and intermediolateral horn of S2-4
preganglionic cell body location of sympathetic
intermediolateral horn of T1-L2 only
preganlionic axon of parasympathetic
relatively long
uses 4 pairs of cranial nerves and 3 pairs of sacral spinal nerves
preganglionic axon of sympathetic
relatively short: white communicating rami
does not use cranial nerves
14 pairs of thoracolumbar nerves
postganglionic cell body of parasympathetic
mostly in target tissues including pelvic splanchnics
postganglionic cell body in symp
mostly sympathetic ganglia
splanchnics in prevert ganglia
postganglionic axons in parasymp
relatively short and contained within target tissue
postganglionic axons in sympathetic
relatively long due to distance from ganglia to target
greay communicating rami
primary target of parasymp
mostly viscera
never skin
primary target of symp
mostly skin
viscera secondary
function of parasymp
resting/digesting decrease heart rate and blood pressure increase GI tract activity constrict pupils and bronchi salivation bladder contraction