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CNS Exam 2 Palmer Questions & Answers 2024/2025
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CNS Exam 2 Palmer Questions & Answers 2024/2025 What is the superior boundary of the spinal cord? - ANSWERSforamen magnum: the superior most ventral rootlet of the first cervical spinal nerve What is the inferior boundary of the spinal cord? - ANSWERSthe disc between vertebral levels L1-L2 ...

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  • September 23, 2024
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  • 2024/2025
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CNS Exam 2 Palmer Questions &
Answers 2024/2025

What is the superior boundary of the spinal cord? - ANSWERSforamen magnum: the superior most
ventral rootlet of the first cervical spinal nerve



What is the inferior boundary of the spinal cord? - ANSWERSthe disc between vertebral levels L1-L2 and
found in adult



How many spinal nerve pairs are there? - ANSWERS31 pairs of spinal nerves



What does the Bell-Magendi law state? - ANSWERSthat dorsal roots contain sensory (afferent) fibers and
ventral roots are motor (efferent) fibers



What parts of the spinal cord are PNS structures? - ANSWERSroots, spinal nerves, and their rami



What is the only CNS structure in the vertebral column? - ANSWERSthe spinal cord itself



Where does the C1 cervical nerve exit? - ANSWERSexits between occiput and atlas



Where does the C4 cervical nerve exit? - ANSWERSexits at IVF between C3 and C4 vertebrae



Where does the C8 cervical nerve exit? - ANSWERSexits at IVF between C7 and T1 vertebrae



Where do the sacral nerves S1-S4 exit? - ANSWERSexit the dorsal and ventral sacral foramina



Where does the sacral nerve S5 exit? - ANSWERSexits at the sacral hiatus

,Where does the coccygeal nerve Co1 exit? - ANSWERSexits the sacral hiatus and this nerve may be
missing



At birth, where is the Co1 cord level typically at the same level as? - ANSWERSL1-L3 vertebra



By adulthood, where is the Co1 cord level found at? - ANSWERSL1-L2 vertebral level in about 90% of
people



What is the tapering end of the Co1 cord level called? - ANSWERSconus medullaris



Where do the roots for the lumbar, sacral, and coccygeal nerves run for an extended distance down
through the what? - ANSWERSlumbar cistern



What is the formation that resembles a horse's tail called? - ANSWERScauda equina



What does an enlargement of the cervical cord level cause? - ANSWERSchanges in blood pressure



What is the central canal continuous with cranially? - ANSWERSthe central canal of the medulla
oblongata and the 4th ventricle



Where does the central canal expand inferiorly? - ANSWERSin the conus medullaris as a terminal
ventricle



Where is a terminal ventricle found? - ANSWERSinside the spinal cord and at T12-L2 level



What houses CSF? - ANSWERSterminal ventricle



What houses the conus medullaris? - ANSWERSterminal ventricle



What is white matter full of and are they myelinated? - ANSWERSfull of axons and majority are
myelinated

, What does white matter carry? - ANSWERScarries ascending (sensory) and descending (motor)



Is white matter organized/grouped? - ANSWERSYes



Lateral horns contain what type of neurons? - ANSWERSpreganglionic autonomic neurons

T1-L2 sympathetic

S2,3,4: parasympathetic



What is another name for the white matter gross structure? - ANSWERSsubstantia alba



What does 1 funiculus contain? - ANSWERSmultiple fasiculi



What are longitudinal bundles of white matter fibers that can be automatically observed? -
ANSWERSfuniculus



Can a funiculus or fasiculi be described functionally? - ANSWERSa fasiculi can



What 4 things does the gray matter contain? - ANSWERS1. dense concentrations of neuron cell bodies

2. many synaptic areas

3. support glial cells

4. dense capillary beds



What rexed lamina has many descending tract fibers synapse with neurons? - ANSWERSLamina VII



What rexed lamina has the nucleus dorsalis and where is it found? - ANSWERSLamina VII and found C8-
L3



Where do the cell bodies of the nucleus dorsalis contribute most axons to? - ANSWERSa famous
ascending fasiculus called the Posterior Spinocerebellar Tract

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