Zoila Rojas
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1 Neuro (Neuroanatomy) Quiz on Neuroanatomy: Somatosensory, created by Zoila Rojas on 22/03/2016.

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Zoila Rojas
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Neuroanatomy: Somatosensory

Question 1 of 41

1

How many neurons are there in pathways that transmit conscious awareness of sensation?

Select one of the following:

  • 2

  • 1

  • 3

  • 4

Explanation

Question 2 of 41

1

The cell bodies of first order neurons for somatosensory pathways to the cerebrum are located in this...

Select one of the following:

  • dorsal horn

  • dorsal root ganglion

  • dorsal column nuclei

  • dorsal roots

Explanation

Question 3 of 41

1

The second order neurons of somatosensory pathways to the cerebrum always...

Select one of the following:

  • have axons that cross the midline

  • synapse contralateral to first order axon

  • synapse at level of closed medulla

  • have cell bodes in dorsal horn

Explanation

Question 4 of 41

1

The dorsal column medial lemniscal pathway...

Select one of the following:

  • conducts mechanosensation

  • has a single thalamic target

  • when injured causes deficits in two point discrimation

  • all of these are true

Explanation

Question 5 of 41

1

Mechanosensation from the right arm travels up the...

Select one of the following:

  • left fasciculus gracilis

  • left fasciculus cuneatus

  • right fasciculus cuneatus

  • right fasciculus gracilis

Explanation

Question 6 of 41

1

Mechanosensation from the sacral region travels...

Select one of the following:

  • up fasciculus gracilis where it synapses with second order neurons at nucleus gracilis and crosses via the anterior part of medial lemniscus

  • up fasciculus cuneatus where it synapses with second order neurons at nucleus cuneatus and crosses via the posterior part of medial lemniscus

  • up fasciculus gracilis where it synapses with second order neurons at nucleus cuneatus and crosses via the anterior part of medial lemniscus

  • up fasciculus gracilis where it synapses with second order neurons at nucleus fasciculus and crosses via the posterior part of medial lemniscus

Explanation

Question 7 of 41

1

Axons on the posterior most part of the right medial lemniscus in the closed medulla are...

Select one of the following:

  • carrying mechanosensation from left cervical and thoracic regions

  • carrying mechanosensation from right cervical and thoracic regions

  • carrying mechanosensation from right lumbar and sacral regions

  • carrying mechanosensation from left lumbar and sacral regions

Explanation

Question 8 of 41

1

The third order neurons of the dorsal column medial lemniscal pathway...

Select one of the following:

  • have cell bodies in VPM thalamus

  • enter the cerebral cortex via the superior cerebellar peduncle

  • terminate at lower 2/3rds of brodman's area 3, 1, and 2

  • none of these are true

Explanation

Question 9 of 41

1

Which of these is true about the anterior spinothalamic and dorsal column medial lemniscal pathway?

Select one of the following:

  • They both have a single termination at VPL thalamus

  • Their second order neurons are located on the dorsal horn of the spinal cord

  • For both pathwyas information on spinal cord is organized somatotopically with cervical information being more medial and sacral information more lateral

  • both of their first order neurons are located in the DRG

Explanation

Question 10 of 41

1

Pain fibers that travel via anterior spinothalamic tract...

Select one of the following:

  • have their first synapse in the dorsal horn in region called substantia gelatinosa

  • that are damaged may never recover when there is damage to anterior spinothalamic tract

  • travel much faster than mechanosensation in dorsal column medial leminscal pathway

  • none of these are true

Explanation

Question 11 of 41

1

Second order neurons in anterior spinothalamic tract...

Select one of the following:

  • cross the midline via the anterior white comissure

  • travel in the spinal cord at the spinothalamic tract

  • synapse directly with third order neurons in VPL thalamus

  • all of these are true

Explanation

Question 12 of 41

1

In what region does the antero-lateral fasciculus become the spinothalamic tract?

Select one of the following:

  • closed medulla

  • open medulla

  • pons at middle cerebellar peduncle

  • above level of T6

Explanation

Question 13 of 41

1

What is the caudal most level in which damage to both the dorsal column medial lemniscus and anterior spinothalamic pathways causes contralateral sensory deficits?

Select one of the following:

  • closed medulla

  • cervical level

  • thoracic level

  • open medulla

Explanation

Question 14 of 41

1

At the pontine level the mechanosensation from the cervical region is located

Select one of the following:

  • medially

  • anteriorly

  • posteriorly

  • laterally

Explanation

Question 15 of 41

1

At the level of the midbrain the mechanosensation of the sacral region in the medial lemniscus is most...

Select one of the following:

  • medial

  • lateral

  • anterior

  • posterior

Explanation

Question 16 of 41

1

Two important collateral targets at the midbrain for the spinothalamic tract are the...

Select one of the following:

  • deep layer of superior colliculus and central gray

  • deep layer of inferior colliculus and red nucleus

  • edinger westphal nucleus and trigeminal motor nucleus

  • none of these

Explanation

Question 17 of 41

1

Before the synapsing at the VPL thalamus, the 2nd order axons of both the dorsal column medial lemniscus and anterior spinothalamic pathways pass through this structure in the midbrain that is lateral to the red nucleus.

Select one of the following:

  • central gray

  • prerubral field

  • subthalamic nucleus

  • reticular formation

Explanation

Question 18 of 41

1

Which of these is not a termination of the spinothalamic tract in the brainstem?

Select one of the following:

  • central gray

  • hypothalamus

  • medial part of thalamus

  • red nucleus

Explanation

Question 19 of 41

1

The information that is sent in the axons that are traveling within fasciculus gracilis will most likely have their terminations in what region of the cerebral cortex?

Select one of the following:

  • post central gyrus near the vertex

  • post central gyrus adjacent to the temporal lobe

  • post central gyrus between the vertex and area adjacent to temporal lobe

  • post central gyrus slightly below the vertex

Explanation

Question 20 of 41

1

All primary afferents of the trigeminal nerve have their cell bodies in the trigeminal (semilunar) ganglion.

Select one of the following:

  • True
  • False

Explanation

Question 21 of 41

1

Which part of the trigeminal nuclei runs between the pons and midbrain?

Select one of the following:

  • mesencephalic nucleus of V

  • trigeminal ganglion

  • principal sensory nucleus of V

  • motor nucleus of V

Explanation

Question 22 of 41

1

The afferents of cell bodies located in the trigeminal ganglion terminate at the...

Select one of the following:

  • mesencephalic nucleus of V

  • spinal nucleus of V

  • dorsal horn of spinal cord

  • motor nucleus of V

Explanation

Question 23 of 41

1

The motor nucleus of V contains cell bodies for afferents that...

Select one of the following:

  • innervate muscle of facial expression

  • innervate tongue muscles

  • innervate muscles of mastication

  • innervate muscles of deglutition

Explanation

Question 24 of 41

1

Just as in the spinal cerebral sensory pathways, there are three neurons for trigeminal cerebral pathways.

Select one of the following:

  • True
  • False

Explanation

Question 25 of 41

1

At the level of the closed medulla...

Select one of the following:

  • principal sensory nucleus of V has adjacent region called substantia gelatinosa

  • you will see the spinal nucleus of V along with spinal tract of V

Explanation

Question 26 of 41

1

Which of these structures is continuous with the dorsal horn?

Select one of the following:

  • spinal nucleus of V

  • mesencephalic nucleus of V

  • substantia gelatinosa

  • no structures are continuous with dorsal horn

Explanation

Question 27 of 41

1

Fill the blank space to complete the text.

Second order neurons of trigeminal pathway synapse at .

Explanation

Question 28 of 41

1

This pathways has its primary afferents in the trigeminal ganglion. It then sends an axon to synapse at principal sensory nucleus of V. Axon of second order neuron synapses directly at VPM thalmus. Which is this pathway?

Select one of the following:

  • spinothalamic pathway

  • rostral trigeminal pathway

  • caudal trigeminal pathway

  • visceral pathway

Explanation

Question 29 of 41

1

Where do first order neurons that transmit pain sensation via the caudal trigeminal-thalamic pathway synapse?

Select one of the following:

  • most rostral part of spinal nucleus of V

  • pars caudalis of spinal nucleus of V

  • primary sensory of V

  • mesencephalic of V

Explanation

Question 30 of 41

1

Neurons that communicate position sense of the jaw....

Select one of the following:

  • have their 1st order neurons in the trigeminal ganglion

  • have axons of their first order neurons pass through the trigeminal ganglion

  • have the axons of 1st order neurons synapse at rostral part of spinal nucleus of V

  • have 2nd order cell bodies located in the mesencephalic nucleus of V

Explanation

Question 31 of 41

1

How many neurons are in the spino-cerebellar pathways?

Select one of the following:

  • 1

  • 2

  • 3

  • 4

Explanation

Question 32 of 41

1

1st order neurons of the spinal cerebellar pathways synapse ipsilaterally.

Select one of the following:

  • True
  • False

Explanation

Question 33 of 41

1

Compared to the dorsal column medial lemniscus pathway the dorsal-cuneo spinocerebellar pathway...

Select one of the following:

  • is separated by lower and upper extremeties

  • carries information about pain and temperature

  • crosses the midline in the medulla

  • none of these are true.

Explanation

Question 34 of 41

1

The cuneo cerebellar pathways sends information levels ...... in the spinal cord, synapsing then traveling to the ..... cerebellum via the ......

Select one of the following:

  • above T3....ipsilateral....inferior cerebellar penduncle

  • above T3....ipsilateral....accessory cuneate nucleus

  • above T6....contralateral....inferior cerebellar peduncle

  • above T6....ipsilateral....accessory cuneate nucleus

Explanation

Question 35 of 41

1

Where do fibers from the cuneu-cerebellar pathway that enter at levels C6 synapse?

Select one of the following:

  • accessory cuneate nucleus

  • nucleus cuneatus

  • deep nuclei of cerebellum

  • column of clarke

Explanation

Question 36 of 41

1

Nucleus cuneatus is to accessory nucleus as nucleus gracilis is to....

Select one of the following:

  • spinal nucleus of V

  • column of clarke

  • substantian nigra

Explanation

Question 37 of 41

1

The first order neuron for the information that goes from the lower limbs to the cerebellum is located...

Select one of the following:

  • in the accessory cuneate nucleus

  • column of clark

  • nucleus gracilis

  • medial part of dorsal column medial lemniscus

Explanation

Question 38 of 41

1

Visceral information from cranial nerves VII, IX and X synapse at the

Select one of the following:

  • nucleus ambigiuus

  • nucleus solitarus

  • nucleus gracilis

  • central gray

Explanation

Question 39 of 41

1

The axons from the nucleus solitarus projects to....

Select one of the following:

  • VPM

  • hypothalamus

  • amygdala

  • all of these

Explanation

Question 40 of 41

1

The process of stereognosis is mediated between what two regions of the cerebral cortex?

Select one of the following:

  • posterior parietal and postcentral gyrus

  • postcentral gyrus and precentral gyrus

  • SII and postcentral gyrus

  • anterior parietal and precentral gyrus

Explanation

Question 41 of 41

1

Descending projections from primary sensory cortex to brainstem and spinal cord aid in the process of...

Select one of the following:

  • stereognosis

  • selective attention

  • sensory association

  • orientation and direction of stimuli

Explanation

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