Key concepts: Autonomic nervous system Flashcards
conditions
neuroblastoma
autonomic neuropathy
in a division of nervous function where does the parasympathetic system lie
subdivision of peripheral
then autonomic
basic function of parasympathetic nervous system
rest and digest
nerve origin parasympathetic
brainstem
sacral spinal cord
don’t travel directly they will visit ganglia first
where are the parasympathetic ganglia
near or in the walls of the organs that they supply
preganglionic neurons in parasympathetic
long
neurons from brainstem/spinal cord to the parasympathetic ganglion
what do the pre ganglionic parasympathetic synapse with
post ganglionic
post ganglionic neurons in parasympathetic
short
neurons in the ganglia with targets of the parasympathetic nervous system
neurotransmitter in parasympathetic neurons
acetylcholine
preganglionic neurons in the brainstem arise from cranial nerve nuclei for
oculomotor
facial
glossopharyngeal
vagus
preganglionic neurons in the spinal cord arise from where
sacral spinal cord
S2,3,4
come together to form the pelvic nerves
oculomotor
V3, ophthalmic
supply the sphincter papillae and sphincter muscles
facial
V2 maxillary and V3 mandibulary to glands: orbit cavity, nasal cavity and oral cavity
glossopharyngeal
V3 to parotid gland
vagus
special visceral branches to the viscera in the thorax and abdomen
synapse with the enteric system in the gut walls/ post ganglionic with direct organ association
supply ends just prior to the left colic flexure
S2,3,4
leave the ventral rami as pelvic splanchnic nerves
synapse in the enteric system in the colon
post ganglio associated with pelvic and perineal viscera
sympathetic division of the nervous system
peripheral
autonomic
brief function of sympathetic
fight or flight
where do sympathetic neurons originate
thoracic and lumbar spinal cord
T1-L2
ganglia in sympathetic fibres
have sympathetic ganglia and chain ganglia
the spinal cord to the adrenal medulla is an exception
chain ganglia
close to the spinal cord
pre-vertebral ganglia
closer to the rogans that they supply
nerve route brief sympathetic
short pre synaptic
long post synaptic
neurotransmitters in sympathetic
pre ganglionic release acetylcholine
post ganglionic release norepinephrine, some use acetyl choline
location of visceral motor cell bodies
cranial nerves: 3,8,9,10
T1-L2
S2-4
which pathway do sensory fibres take
dorsal route
back of the butterfly
which pathway do motor fibres take
ventral route
front of the butterfly
M=Mother=boobs= top wings of butterfly
what is the action of sympathetic pathway to the periphery
blood vessels
erector pili
sweat glands
dorsal route
sensory infromation into the spinal cord
cell bodies lie outside the CNS in the sensory ganglia
sensory ganglia are associated with the spinal ganglia
ventral route
motor fibres out of the CNS
cell bodies lie inside of the CNS
sympathetic motor pathway
cell bodies in the lateral horn
fibres leave the cord in the ventral route
synapse with the 2nd motor neuron in the motor ganglion outside of the CNS
paraveterbral ganglia
connected to the ventral rami of the spinal nerve by rami communicantes
2 types of rami communicantes
gray ramus
white ramus
gray ramus
carries post ganglionic back to the spinal nerve
is unmyelinated
white ramus
carries pre ganglionic from the spinal cord to the sympathetic ganglion
myelinated
sympathetic pathway to the core
pre ganglionic fibres originate in the lateral horn
ventral route out of the spinal cord
synapse with the post ganglionic in the paravertebral sympathetic ganglia suspended from the ventral ramus
then form named visceral nerves
sympathetic pathway to the abdomen and the pelvis
don’t synapse in the sympathetic ganglion
leave as splanchnic nerves to the abdomen
synapse in pre vertebral ganglion that is associated with blood vessels
short pre synaptic
