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53 Cards in this Set

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  • Back
Ascending tracks ... sensory or motor?
Sensory
Descending tracks ... sensory or motor?
Motor
A sensory impulse travels to the brain via a 1st sensory neuron located...
somewhere out in the body
A sensory impulse travels to the brain via a 2nd sensory neuron located...
in the spinal cord
A sensory impulse travels to the brain via a 3rd sensory neuron located...
from thalamus to post central gyris
An efferent pathway has how many neurons?
2 or 3
A neuron travels from the brain to a portion of the spinal cord called...
upper motor neuron
Located in the gray matter axon - pre-central gyris down into the spinal cord
Upper motor neuron
A 2nd neuron synapses with the upper motor neuron in the cord and leaves the cord and enters the ...
peripheral nervous system
What is the name of the 2nd neuron?
cortiocospinal tract
Where is the 2nd neuron's cell body?
in the ventral horn
Upper motor neuron starts in the ...
pre-central gyris of the frontal lobe
The pre-central gyrus is the major center for --- in the cortex
voluntary muscle control
The upper motor neurons travel down the internal capsule down into the ...
basis pedunculi
After the upper motor neurons travel to the basis pedunculi they travel to the ...
medulla
Another term used to describe 90% of the fibers that decussate in the medulla...
Crossover
When something starts in the cortex of the brain and travels down the spine becomes
corticospinal
When something travels down the lateral white column is becomes
lateral corticopinal tract
What does the other 10% of the upper neuron fibers that did not cross over in the medulla do?
Travel down in the ventral white column of the cord
What is the term used to describe the side the upper neuron fibers travel down
Ipsilateral
When upper neuron fibers cross over to synapse with a lower motor neuron the trace is called...
ventral corticospinal tract
What are the names for the pyramid shaped first order neurons in the cerebral cortex/
Pyramidal tract
Term used for thse slowing down of other motor neurons
Supressor neurons
Exaggerated movement when a reflex is made
Hyperflexion
When a reflex just stays in place
spasticity
What percent of the pyramital system decussates in the brain stem?
90%
What percent of the pyramidal system decussates in the spinal cord?
10%
Motor is a how many neuron pathway?
2
Upper motor neuron starts in the --- and synapses with --- in the ---
precentral gyrus
lower
ventral horn
Voluntary muscles of the head have upper motor neurons that have their cell bodies in the --- and synapse with a lower neuron but now the lower motor neuron starts in the --- not in the spinal cord
precentral cortex
brain stem
Another name for the medulla oblongata where the lowest of the lower motor neurons exit the CNS
Bulbar
What is the name of the tract involving the bulbar and the voluntary muscles?
Corticobulbar tract
CN III is called --- and stimultes muscles for movement of the ---
oculomotor
eye ball
CN IV is called --- and stimulates muscles for movement of the
trochlear
eyebal (superior oblique)
CN VI is called --- and stimulltes --- for --- of the eyeball
Abducis
muscles
movement
Superior rectus pulls the eye....
up
inferior rectus pulls the eye...
down
lateral rectus pulls the eye...
lateraly
Medial rectus pulls the eye...
medially
What takes care of the superior oblique?
Trochlea
What goes to the lateral rectus?
Abducis
CN that carries afferent (sensory) impulses to the brain form the face is...
CNV - trigeminal
CNV stimulates the muscles we use for --- which are called ---
chewing
muscles of mastication
CN VII is called the --- and stimulates --- muscles
facial
facial expression
CN IX is called the --- and only stimulates --- muscles which is located in the --- and is called the ---
Glossopharyngeal
throat
stylopharyngeal
CN X is called the --- which means ---
vagus
wanderer or vagabond
The vagus nerve stimulates --
all the muscles of the throat
CN XI is called --- or ---
accessory
spinoaccessory
CN XI supplies the --- and the ---
sterno scm and the upper traps
CN XII is the ---
hypoglossal
The CNXII stimulates all but which muscle of the tongue?
palitoglossus
What is an illness related to a problem with CNV?
Tic de la rue
What is a problem related to CNVII
Bells Palsy