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42 Cards in this Set

  • Front
  • Back
A ________ is a collection of nerve cell bodies within the CNS.
nucleus
A ________ is a collection of nerve cell bodies within the PNS.
ganglia
_________ ganglia DO NOT have a synapse.
Dorsal root
________ ganglia are visceral motor and do have a synapse.
Autonomic
Where do spinal nerves 'mix' (to become both sensory & motor)?
In the nerve then rami. The ROOTS are where they are separated
Cell bodies of SYMPATHETIC nerve cells are located in the __________.
lateral horn; the axon then exits the ventral root
All sympathetic fibers pass through the _______ chain where where (sometimes) ______ occurs immediately.
sympathetic;

synapse
THe motor aspect of the nervous system can be divided into ________ & ________.
somatic;

autonomic
Somatic Nervous System:
Target Organ:________
Neuron(s) involved:_______
Origin of Neuron:_________
skeletal muscle;
one;
spinal cord, specifically anterior horn cells
Autonomic Nervous System:
Target Organ:________
Neuron(s) involved:_______
Origin of Neuron:_________
smooth muscle, cardiac muscle, glands;
2;
CNS
Sensory fibers running with the ANS ____ (are or aren't) part of the ANS.
aren't
ANS is voluntary (T/F).
false
The ANS is defined as ____________, or efferent.
visceromotor
The 2 divisions of the ANS are ________ &________.
sympathetic & parasympathetic
THe ________N.S. is voluntary, while the _________N.S. is involuntary.
SOMATIC:

AUTONOMIC
THe parasympathetic N.S. arises ________ (where).
(what specific numbers)
from spinal cord (specifically S2-S4) & brainstem (CN 3, 7, 9, 10).
It runs alongside (para) the sympathetic n.s.
THe _______ N.S. has LONG PRESYNAPTIC ganglia (and therefore short postsynaptic).
PARASYMPATHETIC
The_______ N.S. has SHORT PRESYNAPTIC ganglia (and therefore long postsynaptic).
SYMPATHETIC
The parasympathetic N.S. is known for _________outflow (from the brainstem or sacral portion of cord)
craniosacral
CN ____ is the vagus nerve.
ten (it is part of the Parasympathetic (autonomic)nervous system.
The parasympathetic fibers extend to internal organs, or ________, NOT to the _________.
viscera;
periphery
The parasympathetic nervous fibers synapse in ganglia _____ (where).
in or near target organ.
Parasympathetic fibers tend to lead to _______ smooth muscle.
nonvascular
i.e. smooth muscle in gut, tubes (bile duct), and bags not filled with blood.
The vagus nerve goes from neck to _________.
Vagus =
left colic flexure
"to wander"
sacral nerves (__-__) that are part of the parasympath. N.S. extend from ____ to ____.
S2-4;
left colic flexure and pelvic organs.
THe sympathetic N.S. targets ___________.
glands, cardiac muscle, & smooth muscle
The sympathetic nerve fibers are located in the ______ of spinal cord segments _____ -_____.
Intermedial lateral cell column;
T1-L2
Sympathetic axons preceed out of _____ and form a component of the _____root.
intermedial lateral cell column;
ventral
Once sympathetic fibers leave the ventral root, they _______.
lead to spinal nerve then leave via dorsal or ventral rami. Thy synapse, then the postganglionic fibers proceed to target organs
The sympathetic N.S. is known for _________outflow
thorocolumbar
How do sympathetic fibers enter body wall & limbs?
spinal nerves: leave cord, synapse immediately in chain, connect with grey ramus to spinal nerve;
OR go up or down the chain and then synapse
Sympathetic nerves _____ (dilate or constrict) vessels, and ______ glands.
constrict;

supply
Where are sympathetic fibers located on the body?

how?
EVERYWHERE.

hitching a ride with every spinal nerve (which cover every sq. inch of the body.
Target organs, or ________, for sympathetic nerve fibers are found in the ________.
effectors;
ventral body wall or limbs
Every presynaptic sympathetic fiber enters the _______.
sympathetic chain
THe 2 options for sympathetic nervs leaving for the viscera (not periphery): ____ & ______.
LEave CNS, synapse in chain, go to target organ;
leave CNS, no synapse, pass through diaphragm, go to prevertebral ganglion & synapse there, then t.o. (thoracic or abdominopelvic)
Prevertebral ganglion = ___________ ganglion.
preaortic
splanchnic = _________
visceral
sympathetic innervaton of thoracic viscera: __________
cell body exits spinal cord, ventral root, spinal nerve, sympathetic trunk via white comm. rami, SYNAPSES (PARAvertebral), extends to heart & lungs.
Thoracic (cardiopulmonary) splanchnic nerves extend to the _________.
heart and lungs
some thoracic sympathetic fibers reach _______ before synapsing.
cervical region (heart embryologically formed in cervical region)
sympathetic innervaton to abdominopelvic viscera: __________
fibers leave thoracic portion of cord, NO SYNAPSE, synapse in prevertebral ganglion, then to target organ.