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USAHS NEUROSCIENCE EXAM 2 WITH ACTUAL CORRECT QUESTIONS AND VERIFIED DETAILED ANSWERS |FREQUENTLY TESTED QUESTIONS AND SOLUTIONS |ALREADY GRADED A+|BRAND NEW VERSION!!|GUARANTEED PASS |LATEST UPDATE$22.99
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USAHS NEUROSCIENCE EXAM 2 WITH ACTUAL CORRECT QUESTIONS AND VERIFIED DETAILED ANSWERS |FREQUENTLY TESTED QUESTIONS AND SOLUTIONS |ALREADY GRADED A+|BRAND NEW VERSION!!|GUARANTEED PASS |LATEST UPDATE
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Course
USAHS NEUROSCIENCE
Institution
USAHS NEUROSCIENCE
USAHS NEUROSCIENCE EXAM 2 WITH
ACTUAL CORRECT QUESTIONS AND
VERIFIED DETAILED ANSWERS
|FREQUENTLY TESTED QUESTIONS AND
SOLUTIONS |ALREADY GRADED
A+|BRAND NEW
VERSION!!|GUARANTEED PASS |LATEST
UPDATE
USAHS NEUROSCIENCE EXAM 2 WITH
ACTUAL CORRECT QUESTIONS AND
VERIFIED DETAILED ANSWERS
|FREQUENTLY TESTED QUESTIONS AND
SOLUTIONS |ALREADY GRADED
A+|BRAND NEW
VERSION!!|GUARANTEED PASS |LATEST
UPDATE
Sensory association cortex lesions cause deficits in what?
Higher order sensory analysis
In the anterolateral spinal tract (ALS) the legs are ________.
Lateral
Where is the cervical enlargement?
C3-T1
Where is the lumbosacral enlargement?
L1-S2
Thoracic segments T1-L2 house the _____________________ cell column. (Lateral horn- preganglionic
sympathetic neurons)
Intermediolateral
The most white matter is in the _________ segments.
Cervical
_________ ___________ _____ are the motor nuclei for innervation of skeletal muscle (alpha motor
neurons/ LMNs)
1|Page
,Rexed laminae IX
The descending motor pathways are divided into lateral and medial systems based on their location in
the spinal cord. The lateral motor systems travel in the lateral portion of the spinal cord and synapse on
the lateral motor nuclei for _______ limb movements favoring ________.
Distal, flexors
The descending motor pathways are divided into lateral and medial systems based on their location in
the spinal cord. The medial motor systems travel in the anteromedial portion of the spinal cord and
synapse on the medial motor nuclei for _______ limb/trunk movements favoring ____________.
Proximal, extensors
Flexor motor control is located more ________ in the spinal cord.
Dorsal
In addition to the anterior and posterior spinal arteries there are ____________ arteries that help to
supply the spinal cord.
Radicular
Check table 6.3
The great radicular artery of adamkiewicz provides major blood supply to the __________ and
__________ cord.
lumbar, sacral (T9-T12)
The ____________ ________ is the mid-thoracic area (~T4-T8) where there is decreased blood
perfusion. Susceptible to infarct during thoracic surgery or other conditions causing decreasing aortic
pressure (anterior cord syndrome).
What is the most clinically important descending motor pathway in the nervous system?
Lateral corticospinal tract (controls voluntary, fine, skilled, movements of the distal extremities, unique
contribution is to activate mms. independently of other mms.)
USE THE QUESTIONS IN VOPP 2!!!!!!!!!!!!!
True or false:
The LCST is a 2 neuron pathway.
True (1st order UMN and 2nd order LMN)
When does the LCST cross over?
In the caudal medulla
The LCST descends down to the brainstem where 85-90% of fibers cross over to the contralateral side at
the ___________ ___________ located in the cervicomedullary junction (foramen magnum) to enter
the lateral spinal cord.
Pyramidal decussation
The rubrospinal tract originates in the red nucleus of the _______________.
Mesencephalon
The rubrospinal tract originates in the mesencephalon and decussates _____________________ and
crosses to the opposite side ventral tegmental decussation.
Immediately
After the rubrospinal tract descends through the pons and medulla it goes into the ________ spinal cord
to enter the anterior horn where it synapses with the LMN.
Lateral
The rubrospinal tract is thought to be involved in contralateral limb movement and ends in the
_________ spinal cord.
Cervical
The ACST is the remaining 10-15% of fibers from the ______ that did not cross at the pyramidal
decussation.
LCST
The _________ controls voluntary movements of bilateral axial and girdle muscles (proximal muscles i.e.
neck/trunk).
ACST
3|Page
, True or false:
The ACST has bilateral control to the cervical spinal cord.
True (tone/posture to the neck; postural adjustments)
The MVST originates at the medial (and inferior) vestibular nuclei in the __________ __________.
Rostral medulla
The _______ splits; one side crosses and other stays ipsilateral. Descends bilaterally for head and neck
tone.
MVST
The LVST originates in the lateral vestibular nuclei in the ______.
Pons
The _________ descends ipsilaterally and is involved with balance for the entire body.
LVST
The PRST originates at the reticular formation in the ______.
Pons
The MRST originates at the reticular formation in the ____________.
Medulla
Both the PRST and MRST descend ipsilaterally through the entire spinal cord to enter the _________
horn to synapse on the medial LMNs. (Both involved in gait/posture)
Anterior
The ______________ tract originates in the superior colliculus.
Tectospinal (superior colliculus is also known as the tectum of the midbrain)
The tectospinal tract crosses immediately at the __________ ______________ decussation.
Dorsal tegmental
The ______________ tract descends contralaterally then emerges the anterior horn. It ends in the
cervical cord and is involved in coordination of head and eye movements. (movements in response to
visual and auditory stimuli; function is uncertain)
Tectospinal
The LCST and ACST have neurons referred to as ________________ fibers because they originate in the
brain.
Corticospinal (specifically 50% from BA 4 and the rest from BAs 6, 3, 1, 2, 5, 7; synapse in the ventral
horn of the spinal cord)
4|Page
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