Nervous System Anatomy Flashcards
to monitor and regulate function and blood flow to the viscera
Job of the autonomic nervous system
Sensory
Afferent
Motor
Efferent
Things like skeletal muscles, skin, we think about it and can control it
Somatic
Hollow tubes! Controls things like heart, digestive system, smooth muscles.
We don’t control!
Visceral
GSA
General somatic afferent (sensory)
GSE
General somatic efferent (motor)
GVA
General visceral afferent (sensory)
GVE
General visceral efferent (motor)
____ pathway utilized 2 neurons.
GVE
What are the two neurons utilized in the GVE pathway>
One from CNS (brainstem or spinal cord)
One in periphery (ganglia)
In sympathetic pathway, the synapse occurs closer or father to CNS?
Closer!
In PARAsympathetic pathway, the synapse occurs closer or father to CNS?
Farther! longer time as pre-ganglionic.
Somatic or visceral?
Somatic! Effector is skeletal muscles
Somatic or visceral?
Viscera. Effector is cardiac muscle, smooth muscles, glands.
General visceral afferent fibers that course through GVE’s are ____
Sensory
GVA axons pass through sympathetic ganglion _____ synapsing
WITHOUT
___ fibers used pre-exsisiting pathways to arrive at their target organs
Autonomic
T1-L2, thoracolumbar
Sympathetic
C3, C7,C9,C10,
S2, S3, S4
Cranial-sacral
Parasympathetic
Fight or fight
Sympathetic
Rest & Digest
Parasympathetic
____ axons are eveywhere, superficial & deep
Sympathetic
Sympathetic divison axons arise from?
Thoracolumbar spinal cord T1-L2
appear as small lateral horns of the H-shaped gray matter
Consists of the cell bodies of the presynaptic neurons of the sympathetic nervous system.
Intermediolateral cell column
Runs from the base of the skull to the tip of the coccyx
Sympathetic Chain (trunk, Blue)
Little globs on chain where synapses occurs
Sympathetic chain ganglia
Myelinated axons, only present at spinal cord levels T1 through L2
Where signal enters into the ganglia from nerve root
White rami (pink)
Contains unmyelinated axons, present at ALL 31 SPINAL CORD LEVELS
Where signals leave ganglia to exit out of spinal nerves to rest of body
Gray Rami (red)
3 pathways of sympathetic?
- TO body wall (only from T1-L2)
- TO viscera above diaphragm (T1-T4)
- To viscera below diaphragm (T5-L2)
Nerves that are formed by signals coming off sympathetic chain in pathway to viscera below diaphragm
Splanhneic nerves
What must start at T5-L2?
Sympatheic signals to the viscera below the diaphragm 
Only go to deep structures (not genitals)
Parasympathetic
_____ nerve, to cilliarly ganglion (synapse) -> post ganglionic-> lacrimal gland (eye)
C3 Occulomotor
______ nerve to PPG (synapse) -> post ganglionic -> pupillary constriction
OR Submandibular ganglion (synapses) -> post ganglionic -> Salivary glands
C7 Facial Nerve
___ nerve to Otic ganglion (synapse) -> post ganglionic -> parotid glad
C9 Glossophryngeal nerve
___ nerve to (no specific ganglion associated) synapse on body wall, down to thorax:
-Heart
-Thorax
-part of digestive system
C10 Vagus Nerve
Carnial nerves para?
C3, C7, C9, C10
Sacral nerves para?
S2-S4
In the sacral pathway (Para) there are IML like regions in the sacral region of spinal cord arise is what area
Lateral areas
____ arise from he same cord levels of GVEs
GVAs
Pain in viscera feels like pain somewhere else (somatic areas)
Referred Pain
___ enter the SAME spinal cord levels as GVAs
GSA
Pain in appendix
Send signal via visceral sensory nerve
Enter via DORSAL root ganglion .
Send signal from respective somatic sensory nerve
Enter via dorsal root
BOTH _____ together
Synapse together= pain referred to somatic region instead of visceral!
Pain on side.
