Test
PMU - 2nd/2t Semester Anatomy - CNS (Spinal Cord)
Preguntas del test (37)
1The spinal cord occupies the entire vertebral canal:
- AVerdadero
- BFalso
2The end of spinal cord (conus medullaris) adult is at L2:
- AVerdadero
- BFalso
3The sacrum contains the subarachnoid space along the whole length of the sacral canal:
- AVerdadero
- BFalso
4The atlas has the first cervical spinal nerve on its posterior arch:
- AVerdadero
- BFalso
5The first spinal nerve has the shortest roots and the last one the longest:
- AVerdadero
- BFalso
6The connection between the dorsal and lateral funicle is called Lisauer zone (zona terminalis)
- AVerdadero
- BFalso
7Sulcus intermedius dorsali is a groove between sulcus medianus dorsalis and sulcus dorsolateralis in the upper thoracic and cervical part of the spinal cord.
- AVerdadero
- BFalso
8Dorsal funiculus in the cervical segments contains fasiculus gracilis, laterally and fasciculus cuneatus, medially:
- AVerdadero
- BFalso
9The spinal cord ends caudally at the coccyx:
- AVerdadero
- BFalso
10If in the process of doing a lumbar puncture a spinal needle was inserted posteriorly in the mid-line until it had just penetrated the posterior longitudinal ligament, would the needle have entered the sub-arachnoid space?
- AVerdadero
- BFalso
11The part of a spinal nerve that supplies the true back muscles and the skin overlying them is the:
- ADorsal primary ramus
- BDorsal root
- CVentral primary ramus
- DVentral root
12A football player suffers a herniated (ruptured) intervertebral disk in his neck. The disk compresses the spinal nerve exciting through the invertebrate foramen between the 5th and 6th cervical vertebrae. Which spinal nerve is affected?
- AC4
- BC5
- CC6
- DC7
- EC8
13A man has a herniated intervertebral disk between the fourth and fifth lumbar vertebrae. If this disk compresses the spinal nerve in the intervertebral foramen immediately posterior to this disk, which spinal nerve would be affected?
- AL3
- BL4
- CL5
- DS1
- ES2
14Both the dural sac and the subarachnoid space end at which vertebral level?
- AL4
- BL5
- CS2
- DS1
- ES4
15It is decided to image the spinal cord and spinal nerve rootlets by doing a myelogram (injection of a radio-opaque dye into the subarachnoid space followed by a radio-graph). In order to inject the dye without injury to the spinal cord, the injection is usually done below what vertebral level?
- AL1
- BL2
- CL3
- DL4
- EL5
16The myelogram revealed that the dye had leaked out along the spinal nerves in the mid cervical region on the right side. For the dye to leak out, what layer must have been torn or ruptured?
- AArachnoid
- BDenticulate ligament
- CPeriosteum
- DPia
- EPerineurium
17In the lumbar spine, the L4 nerve root sleeve exits:
- AAbove the pedicle of L4 and at the top of the intervertebral foramen
- BAbove the pedicle of L4 and at the bottom of the intervertebral foramen
- CBelow the pedicle of L4 and at the top of the intervertebral foramen
- DBelow the pedicle of L4 and at the bottom of the intervertebral foramen
18Which structure does NOT contain efferent autonomic nerve fibers?
- ADorsal ramus of C4
- BDorsal root of T6
- CVentral root of T3
- DVentral ramus of L2
19It was noted that after an injury the patients face on the right side was flushed due to dilation of the blood vessels. The lack of vaso-constriction was due to interruption of what fibers somewhere along their course?
- ASomatic Afferent
- BSomatic Efferent
- CParasympathetic
- DSympathetic
20A 60-year-old male presented with a number of unusaul signs and symptoms in the facial region. Among others, it was found that the right side of his face was flushed (red). 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?
- ACranial outflow of the ans
- BDorsal roots of cervical nerves
- CGray rami communicantes of T5
- DSympathetic nerve fibers
- EVagus nerves
21The conus medullaris:
- AExhibits both a cervical and lumbar enlargement.
- BHas a modification of neural tissue extending from its termination to the coccygeal ligament
- CGives origin to most of the cauda equina.
- DIs found at its lowest extent at S2
- EIs normally anesthetized to perform a spinal tap
22A neuron with a cell body in the dorsal root ganglia could convey what type of fibers?
- AMotor to the deep back muscles
- BMotor to the pectoralis major muscle
- CSensory from the skin overlying the trapezius
- DSympathetic preganglionics to the suprarenal medulla
- EVisceral efferents to the stomach
23Which is a source of axons found in the dorsal primary ramus of the 4th thoracic spinal nerve?
- AAfferent neurons arising from the skin overlying the trapezius muscle
- BSomatic motor neurons supplying the levator scapulae muscle
- CSomatic motor neurons supplying the rhomboid muscles
- DSomatic motor neurons supplying the trapezius muscle
24The denticulate ligament:
- AIs a modification of pia mater
- BIs found between all dorsal and ventral roots
- CAttaches to the dural sac continuously
- DHas its terminal attachment at S2
- EHolds the radicular arteries in place.
25In order to expose the spinal cord from the posterior side, it is necessary to remove the:
- ALaminae, pedicles and ligamenta flava
- BLaminae, spinous processes and ligamenta flava
- CPedicles, spinous processes and posterior longitudinal ligament
- DTransverse processes, pedicles and ligamenta flava
26Cells that convey information to the CNS are:
- AAfferent sensory neurons
- BPseudounipolar cells
- CFirst neuron is the sensory pathway
- DLocated in the lateral horn of spinal cord
- EWith peripheral processes ending on somatic or splanchnic receptor
27Dorsal roots of a spinal nerve:
- AAre formed by the central processes of sensory neurons in the spinal ganglion
- BEnter the ventrolateral sulcus of the spinal cord.
- CConvey somatosensory (proprioseptive and visceroseptive) information
- DAre covered with pia meter
- ETake part in the formation of the spinal nerve.
28The ventral roots of a spinal nerve:
- AConvey motor information to the skeletal muscles.
- BExit through the ventrolateral sulcus of the spinal cord.
- CAre ensheated with dura mater spinalis.
- DOriginate from interneurons in the ventral horn
- EContain autonomic fibers.
29The boundary between spinal cord and medulla oblongata is:
- AForamen magnum
- BDecussatio pyramidum
- CExit of the first pair of spinal nerves
- DExit of the last pair of cranial nerves
- ECervical enlargement
30A spinal segment is defined as that region of the spinal cord that:
- ACorresponds to a collection of nerves passing up or down with the white matter.
- BCorresponds to the region of the vertebral column (i.e, cervical, thoracic, lumbar and sacral) to which spinal nerves are sent.
- CSends rootlets to a particular spinal nerve.
- DUnderlies the neural arch of a particular vertebra in the adult.
- ENone of the above.
31The spinal cord in the adult:
- AUsually ends about the level of the lower border of the first lumbar vertebra.
- BHas its largest cross sectional area at the level of the lower cervical vertebrae.
- CHas an anterior median fissure and a posterior median septum.
- DGives origin to the preganglionic fibres of all the parasympathetic nerves
- EReceives its blood supply entirely from the vertebral arteries.
32The white matter of the spinal cord:
- AContain myelin fibers, non-myelin fibers and blood vessels.
- BHas three columns.
- CHas white commissure posteriorly to the gray commissure
- DHas root system and conductive system.
- EIs covered with arachnoidea
33The white matter of the spinal cord:
- AIs located around the gray matter
- BContains two main fascicles along the whole length of the dorsal column
- CContains fasciculi proprii (own bundles)
- DVentral funiculus contains faciculus interfaciculatus (bundle of Schultze)
- EVentral funiculus is between ventral median fissure and ventral roots
34Grossly the spinal cord presents two swellings which are:
- ACervical and thoracic
- BCervical and lumbar
- CThoracic and lumbar
- DThoracic and sacral
- ELumbar and sacral
35All spinal nerves:
- AAre formed by the union of a ventral and dorsal nerve root.
- BHave a ganglion containing synapses on their dorsal root.
- CAre named and numbered according to the vertebra below which they emerge.
- DReceive a grey ramus communicans from the sympathetic nerve trunk.
- EGive off a white ramus communicans to the sympathetic nerve trunk.
36The cell bodies of the nerve fibres making up the fasciculus gracilis are found in:
- APosterior root ganglia
- BPosterior grey horn
- CNucleus gracilis
- DLateral grey horn
- EAnterior grey horn
37In the spinal cord:
- AThere is more white matter in a cross section of the cervical region than the lumbar region.
- BThe anterior horns of grey matter are larger in the lumbar region than in the thoracic region.
- CThe fibres associated with the sensations of pain and temperature form a tract in the anterior columns of white matter.
- DDescending fibres from the motor areas of the brain are found in the lateral and anterior columns of white matter.
- EThere are no descending fibres in the posterior columns.
Información
- Descripción
- MCQ's copy, Anatomy yr 1 PMU
- Autor
- Sole C
- Idioma
- English
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