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Neuro > Ch. 12: Medulla Oblongata > Flashcards

Ch. 12: Medulla Oblongata Flashcards

1
Q 
In general, most descending and ascending tracts in the medulla are located in the:
A. Dorsal area only
B. Central area only
C. Dorsal and central areas
D. Lateral and ventral areas
A

D. Lateral and ventral areas

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2
Q 
Which portion of the medulla is occupied by the nuclei and tract of the trigeminal system?
A. Dorsal area only
B. Central area only
C. Ventral area
D. Lateral area
A

D. Lateral area

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3
Q

The pyramidal decussation is located at the:
A. Rostral end of the medulla
B. Mid portion of the medulla
C. Caudal end of the medulla

A

C. Caudal end of the medulla

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4
Q 
The corticospinal tract is part of the:
A. Fasciculus cuneatus
B. Pyramid
C. Cerebellar peduncles
D. Fasciculus gracilis
A

B. Pyramid

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5
Q

T/F: The vestibular nuclei occupy a large area of the dorsal medulla.

A

True

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6
Q 
The nucleus gracilis and nucleus cuneatus occupy the \_\_\_\_\_ portion of the \_\_\_\_\_ medulla.
A. Dorsal, rostral
B. Dorsal, caudal
C. Lateral, rostral
D. Ventral, caudal
A

B. Dorsal, caudal

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7
Q 
The 3rd eyelid response of the corneal reflex involves the:
A. Trigeminal and abducent
B. Trigeminal and facial
C. Oculomotor and abducent
D. Oculomotor and facial
A

A. Trigeminal and abducent

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8
Q

T/F: Voluntary eye movement is controlled by the vestibular nuclei.

A

False

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9
Q

Signals from the taste buds reach the:
A. Nucleus ambiguus
B. Nucleus of the solitary tract
C. Spinal nucleus of the trigeminal nerve
D. Pontine sensory nucleus of the trigeminal nerve

A

B. Nucleus of the solitary tract

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10
Q 
The CN that carries info from the crista ampullaris and maculae is the:
A. Olfactory
B. Trigeminal
C. Vestibular
D. Cochlear
A

C. Vestibular

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11
Q 
The centers critical for respiration, heart rate, blood pressure, swallowing, and vomiting are located in the:
A. Cerebrum
B. Midbrain
C. Pons
D. Medulla
A

D. Medulla

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12
Q 
The CN that innervates the mandibular and sublingual salivary glands is the:
A. Trigeminal
B. Facial
C Glossopharyngeal
D. Vagus
A

B. Facial

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13
Q 
The palpebral reflex involves the:
A. Trigeminal and abducent
B. Trigeminal and facial
C. Oculomotor and abducent
D. Oculomotor and facial
A

B. Trigeminal and facial

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14
Q 
The tearing reflex requires the:
A. Trigeminal and abducent
B. Trigeminal and facial
C. Oculomotor and abducent
D. Oculomotor and facial
A

B. Trigeminal and facial

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15
Q 
A dog shows the following clinical signs:
- Pupillary dilation of the right eye
- Ventrolateral strabismus of the right eye
- Drooped right eyelid
The lesion likely involves the:
A. Pons
B. Midbrain
C. Medulla
D. Spinal cord
A

B. Midbrain

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16
Q 
The motor nucleus of the trigeminal nerve is located in the:
A. Trigeminal ganglion
B. Medulla
C. Midbrain tegmentum
D. Pons
A

D. Pons

17
Q

T/F: The vestibular system has reciprocal connections with the flocculonodular lobe.

A

True

18
Q

T/F: The vestibular nuclei work closely with the cerebellum to maintain equilibrium and eye position in response to changes in head position.

A

True

19
Q

The dog shows atrophy on the left half of the tongue. This tongue should protrude to the:
A. Right
B. Left

A

B. Left

20
Q 
A dog displays drooped eyelid of the right eye. What other clinical signs would you expect to see on the right eye?
A. Dilated pupil
B. Drooped cheek and lips
C. Medial strabismus
D. Blindness
A

A. Dilated pupil

21
Q

The nucleus that innervates the pupillary sphincter muscle is the:
A. Motor nucleus of the oculomotor nerve
B. Motor nucleus of the facial nerve
C. Parasympathetic nucleus of the facial nerve
D. Parasympathetic nucleus of the oculomotor nerve

A

D. Parasympathetic nucleus of the oculomotor nerve

22
Q

The motor nucleus contributing fibers to both the glossopharyngeal and vagus nerves is the:
A. Nucleus of the solitary tract
B. Parasympathetic nucleus of the vagus nerve
C. Parasympathetic nucleus of the glossopharyngeal nerve
D. Nucleus ambiguus

A

D. Nucleus ambiguus

23
Q 
Difficulty in swallowing suggests dysfunction of which cranial nerve?
A. IX
B. Maxillary branch of V
C. VII
D. VIII
A

A. IX

24
Q

A dog displays the following clinical signs:
- Normal spontaneous blinking
- Both eyes follow your moving hand
- Touching the medial canthus triggers neither palpebral reflex nor 3rd eyelid response
The most likely nerve lesioned in this dog is the:
A. Abducent
B. Oculomotor
C. Trigeminal
D. Facial

A

C. Trigeminal

25
Q 
The taste buds of the tongue are innervated by the:
A. CN V and IX
B. CN V and VII
C. CN VII and X
D. CN VII and IX
A

D. CN VII and IX

26
Q

A male golden retriever has had difficulty eating for 3 days and then stopped eating. On the fourth day the owner noticed that the dog’s jaw hangs open and he is unable to close his mouth. Neurologic examination shows hypotonus of masticatory muscles and the dog
fails to respond to stimulus applied to the orbital, cheek, nostril, or mandibular areas. The eyes follow your moving hand. He also shows normal spontaneous blinking of the eyes. What would you expect to see if you examine the palpebral and corneal reflexes?
A. The palpebral reflex is present, but the third eye response is absent
B. The palpebral reflex is absent, but the third eyelid response is present
C. Both palpebral reflex and third eyelid response are present
D. Both palpebral reflex and third eyelid response are absent

A

D. Both palpebral reflex and third eyelid response are absent

27
Q

A dog displays the following:
- Normal licking response when the nose is moistened
- Normal eye movement
- Responds to touching the orbital area
- Keratitis (inflammation of the cornea) of the right eye
- Absence of spontaneous blinking
You expect that the palpebral reflex of the right eye is:
A. Present
B. Absent

A

B. Absent

28
Q

The tongue of a dog with a chronic lesion of the left hypoglossal nerve deviates to the:
A. Right
B. Left

A

B. Left

29
Q

Which nucleus gives rise to the spinal root of the accessory nerve?
A. Motor nucleus of the accessory nerve
B. Nucleus ambiguus
C. Ventral horn lower motor neurons in the cervical cord segments

A

A. Motor nucleus of the accessory nerve

Neuro (8 decks)

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