CNS- Spinal Cord - Anatomy PMU Year 1/2nd Semester

Med Student
Quiz by Med Student , updated more than 1 year ago
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CNS- Spinal Cord - Anatomy

Resource summary

Question 1

Question
Cells that convey information to the CNS are:
Answer
  • afferent sensory neurons
  • pseudounipolar cells
  • first neuron is the sensory pathway
  • located in the lateral horn of spinal cord
  • with peripheral processes ending on somatic or splanchnic receptor

Question 2

Question
Dorsal roots of a spinal nerve:
Answer
  • are formed by the central processes of sensory neurons in the spinal ganglion.
  • enter the ventrolateral sulcus of the spinal cord.
  • convey somatosensory (proprioseptive and visceroseptive) information.
  • are covered with pia mater.
  • take part in the formation of the spinal nerve.

Question 3

Question
The ventral roots of a spinal nerve:
Answer
  • convey motor information to the skeletal muscles.
  • exit through the ventrolateral sulcus of the spinal cord.
  • are ensheated with dura mater spinalis.
  • originate from interneurons in the ventral horn.
  • contain autonomic fibers.

Question 4

Question
The boundary between spinal cord and medulla oblongata is:
Answer
  • foramen magnum.
  • decussatio pyramidum.
  • exit of the first pair of spinal nerves.
  • exit of the last pair of cranial nerves.
  • cervical enlargement.

Question 5

Question
A spinal segment is defined as that region of the spinal cord that
Answer
  • corresponds to a collection of nerves passing up or down within the white matter
  • corresponds to the region of the vertebral column (i.e, cervical, thoracic, lumbar, and sacral) to which spinal nerves are sent
  • sends rootlets to a particular spinal nerve
  • underlies the neural arch of a particular vertebra in the adult
  • none of the above

Question 6

Question
The spinal cord in the adult
Answer
  • usually ends about the level of the lower border of the first lumbar vertebra.
  • has its largest cross sectional area at the level of the lower cervical vertebrae.
  • has an anterior median fissure and a posterior median septum.
  • gives origin to the preganglionic fibers all the parasympathetic nerves.
  • receives its blood supply entirely from the vertebral arteries.

Question 7

Question
The white matter of the spinal cord:
Answer
  • contains myelin fibers, non-myelin fibers, and blood vessels.
  • has three columns.
  • has white commissure posteriorly to the gray commissure.
  • has root system and conductive system.
  • is covered with arachnoidea.

Question 8

Question
The white matter of the spinal cord:
Answer
  • is located around the gray matter
  • contains two main fascicles along the whole length of the dorsal column
  • contains fasciculi proprii (own bundles)
  • ventral funiculus contains fasciculus interfasciculatus (bundle of Schultze)
  • ventral funiculus is between ventral median fissure and ventral roots

Question 9

Question
Grossly the spinal cord presents two swellings which are
Answer
  • cervical and thoracic
  • cervical and lumbar
  • thoracic and lumbar
  • thoracic and sacral
  • lumbar and sacral

Question 10

Question
All spinal nerves
Answer
  • are formed by the union of a ventral and dorsal nerve root
  • have a ganglion containing synapses on their dorsal root
  • are named and numbered according to the vertebra below which they emerge
  • receive a grey ramus communicans from the sympathetic nerve trunks
  • gives off a white ramus communicans from the sympathetic nerve trunks

Question 11

Question
The cell bodies of the nerve fibres making up the fasciculus gracilis are found in
Answer
  • posterior root ganglia
  • posterior grey horn
  • nucleus gracilis
  • lateral grey horn
  • anterior grey horn

Question 12

Question
In the spinal cord
Answer
  • there is more white matter in a cross section of the cervical region than the lumbar region
  • the anterior horns of grey matter are larger in the lumbar region than in the thoracic region
  • the fibres associated with the sensations of pain and temperature form a tract in the anterior columns of white matter
  • descending fibres from the motor areas of the brain are found in the lateral and anterior columns of white matter
  • there are no descending fibres in the posterior columns

Question 13

Question
To which of the A to D structures are 1 to 4 most closely related? A. intervertebral foramen [blank_start]2[blank_end] B. spinal ganglion [blank_start]1[blank_end] C. brachial plexus [blank_start]4[blank_end] D. spinal cord [blank_start]3[blank_end] 1. dorsal root of spinal nerve 2. trunk of spinal nerve 3. conus medullaris 4. cervical intumescentia
Answer
  • 2
  • 1
  • 3
  • 4
  • 1
  • 2
  • 3
  • 4
  • 4
  • 3
  • 2
  • 1
  • 3
  • 4
  • 1
  • 2

Question 14

Question
To which of the A to D structures are 1 to 3 most closely related? A. ventral median fissure [blank_start]3[blank_end] B. epidural space [blank_start]1[blank_end] C. cerebrospinal fluid [blank_start]2[blank_end] D. terminal cistern [blank_start]2[blank_end] 1. spinal dura mater 2. subarachnoid space 3. anterior spinal artery
Answer
  • 3
  • 2
  • 1
  • 1
  • 2
  • 3
  • 2
  • 1
  • 3
  • 2
  • 1
  • 3

Question 15

Question
To which of the A to C structures are 1 to 3 most closely related? A. posterior funiculus of spinal cord [blank_start]2[blank_end] B. lateral funiculus of spinal cord [blank_start]3[blank_end] C. anterior funiculus [blank_start]1[blank_end] 1. ventral corticosplnal tract 2. fasciculus gracilis & cuneatus 3. ventral spinocerebellar tract
Answer
  • 2
  • 1
  • 3
  • 3
  • 1
  • 2
  • 1
  • 2
  • 3

Question 16

Question
To which of the A to D structures are 1 to 4 most closely related? A. grey commissure [blank_start]4[blank_end] B. lateral column [blank_start]3[blank_end] C. ventral median fissure [blank_start]1[blank_end] D. ventrolateral sulcus [blank_start]2[blank_end] 1. spinal pia mater 2. ventral root of spinal nerve 3. visceromotor neurons 4. canalis centralis
Answer
  • 4
  • 1
  • 2
  • 3
  • 3
  • 1
  • 2
  • 4
  • 1
  • 2
  • 3
  • 4
  • 2
  • 1
  • 3
  • 4

Question 17

Question
The spinal cord occupies the entire vertebral canal:
Answer
  • yes
  • no

Question 18

Question
The end of the spinal cord (conus medularis) in adults is at L2:
Answer
  • Yes
  • No

Question 19

Question
The sacrum contains the subarachnoid space along the whole length of the sacral canal:
Answer
  • Yes
  • No

Question 20

Question
The atlas has the first cervical spinal nerve on it's posterior arch.
Answer
  • Yes
  • No

Question 21

Question
The first spinal nerve has the shortest roots ad the last one the longest.
Answer
  • Yes
  • No

Question 22

Question
The connection between the dorsal and the lateral funicle is called Lisauer zone (zona terminalis).
Answer
  • Yes
  • No

Question 23

Question
Sulcus intermedius dorsalis is a groove between sulcus medianus dorsalis and sulcus dorsolateralis in the upper thoracic and cervical part of the spinal cord
Answer
  • Yes
  • No

Question 24

Question
Dorsal funiculus in cervical segments contains fasciculus gracilis, laterally and fasciculus cuneatus, medually.
Answer
  • Yes
  • No

Question 25

Question
The spinal cord ends caudally at the cuccyx
Answer
  • Yes
  • No

Question 26

Question
If in the process of doing a lumbar puncture a spinal needle was inserted posteriorly in the midline until it had just penetrated the posterior longitudinal ligament, would the needle have entered the subarachnoid space?
Answer
  • Yes
  • No

Question 27

Question
The part of a spinal nerve that supplies the true back muscles and the skin overlying them is:
Answer
  • Dorsal primary ramus
  • Dorsal root
  • Ventral primary ramus
  • Ventral root

Question 28

Question
A football player suffers a herniated intervetebral disk in his neck. The disk compresses the spinal nerve exiting through the intervetebral foramen between the 5th and 6th cervical vertebrae. Which spinal nerve is affected?
Answer
  • C 4
  • C5
  • C6
  • C7
  • C8

Question 29

Question
A man has a herniated intervetebral disk netween the 4th and 5th lumbar vertebrae. If the disk compresses the spinal nerve in the intervetebral foramen immediately posterior to this disk, which spinal nerve would be affected?
Answer
  • L3
  • L4
  • L5
  • S1
  • S2

Question 30

Question
Both the dural sac and the suarachnoid space end at which vertebral level?
Answer
  • L4
  • L5
  • S2
  • S1
  • S4

Question 31

Question
It is decided to image the spinal cord and spinal nerve rootlets by doing a myelogram. I order to inject the dye without damage to the spinal cord, the injection is usually done below what vertebral level?
Answer
  • L1
  • L2
  • L3
  • L4
  • L5

Question 32

Question
The myelogram revealed that the dye had leaked out along the the spinal nerves in the mid cervical region on the righ side. For the dye to leak out, what layer must have been torn ot ruptured?
Answer
  • Arachnoid
  • Denticulate ligament
  • Periosteum
  • pia
  • perumeurium

Question 33

Question
In the lumbar spine, the L4 nerve roots sleeve exits:
Answer
  • above the pedicle of L4 and at the top of the intervetebral foramen
  • above the pedicle of L4 and at the bottom of the intervetebral foramen
  • below the pedicle of L4 and at the top of the intervetebral foramen
  • below the pedicle if L4 and at the bottom of the intervetebral foramen

Question 34

Question
Which structure does NOT contain efferent autonomic nerve fibers?
Answer
  • dorsal ramus of C4
  • dorsal root of t6
  • ventral root of t3
  • ventral ramus of l2

Question 35

Question
it was noted that after the injury the patient's face on the right side was flushed due to dilation of the blood vessels. The lack of vasoconstriction was due to interruption of what fibers somewhere along their course?
Answer
  • somatic afferent
  • somatic efferent
  • parasympathetic
  • sympathetic

Question 36

Question
a 60 years old male presented with a number of unusual signs and symptoms in the facial region. Among others, it was found that the right side of his face was flushed. Further testing revealed a lack of ability to sweat in the same cutaneous region. Which nervous structures were most likely implicated in this set of clinical abnormalities?
Answer
  • cranial outflow of the ans
  • dorsal roots of cervical nerves
  • gray rami communicantes of t5
  • sympathetic nerve fibers
  • vagus berves

Question 37

Question
The conus medularis:
Answer
  • exhibits both a cervical and lumbar enlargement.
  • has a modification of neural tissue extending from its termination to the coccygeal ligament
  • gives origin to most of the cauda equina
  • is found at its lowest extent at S2
  • is normally anesthetized to perform a spinal tap

Question 38

Question
A neuron with a cell body in the dorsal root ganglia could convey what type of fibers?
Answer
  • motor to deep back muscles
  • motor to the pectoralis major muscle
  • sensory from the skin ovelying the trapezius
  • sympathetic preganglionics to the suprarenal medulla
  • visceral efferents to the stomach

Question 39

Question
Which is a source of axons found in the dorsal primary ramus of the 4th thoracic spinal nerve?
Answer
  • Afferent neurons arising from the skin overlying the trapezius muscle
  • somatic motor neurons supplying the levator scapulae muscle
  • somatic motor neurons supplying the rhomboid muscles
  • somatic motor neurons supplying the trapezius muscle

Question 40

Question
The denticulate ligament:
Answer
  • is a modification of the pia mater
  • is found between all dorsal and ventral roots
  • attaches to the dural sac continuously
  • has its terminal attachment at S2
  • holds the radicular arteries in place

Question 41

Question
In order to expose the spinal cord from the posterior side, it is necessary to remove:
Answer
  • Laminae, pedicles and ligamenta flava
  • Laminae, spinous preocess and ligamenta flava
  • Pedicles, spinous process and posterior logitudinal ligament
  • Transverse process, pedicles and ligamenta flava
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