Cranial nerves Flashcards

1
Q

Which cranial nerve is responsible for shoulder elevation and head turning?

A

Cranial Nerve XI. Accessory spinal nerve

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2
Q

Cranial nerves responsible for eye movement

A

III, IV and VI

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3
Q

3 branches of the largest cranial nerve

A

Ophthalmic, maxillary and Mandibular

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4
Q

Cranial nerves involved in taste

A
The facial nerve (CN VII) senses taste from the anterior 2/3 of the tongue. 
The Glossopharyngeal nerve (CN IX) does the posterior 1/3.
The Vagus (CN X) nerve senses taste from the extreme posterior.
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5
Q

Cranial nerve involved in lateral rectus palsy

A

Abducens:
The lateral rectus muscle is innervated by CN VI (abducens nerve). Remember “LR6 SO4 the rest 3”. (Lateral rectus innervated by CN VI, Superior oblique innervated by CN IV, the rest of the eye muscles are controlled by CN III)

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6
Q

Cranial nerve VIII?

A

Vestibulocochlear: Hearing and Balance

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7
Q

Cranial nerve III?

A

The oculomotor nerve (CN III) is responsible for controlling the superior rectus, inferior rectus, medial rectus, and inferior oblique muscles of the eye.

It is also involved in controlling the levator palpebrae muscle for opening the eyelid.

CN III is also used to control pupil constriction and accommodation.

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8
Q

Cranial nerve for tongue movement but not taste

A

CN XII; Hypoglossal nerve

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9
Q

Controls rotating the eye towards the nose & moving the eye downward

A

Trochlear

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10
Q

Partially controls taste & some muscles used for swallowing. Taste perception: posterior ⅓ of the tongue (lingual branch)

A

Glossopharyngeal (CN IX)

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11
Q

Taste from posterior 1/3 of tongue, swallowing, salivation (parotid gland),
monitoring carotid body and sinus chemo- and baroreceptors.

A

Glossopharyngeal (CN IX)

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12
Q

Vagus nerve

A

Taste from epiglottic region, swallowing, palate elevation, talking,
thoracoabdominal viscera, monitoring aortic arch chemo- and baroreceptors.

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13
Q

Involved in controlling heart rate, speech, digestion, and sweating

A

Vagus nerve

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14
Q

Involved in lacrimation (producing tears)

A

Facial nerve

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15
Q

Which of the following cranial nerves is involved in getting the lens of the eye to focus on an object?

A

Oculomotor

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16
Q

Cranial nerve involved in blinking reflex

A

Oculomotor

17
Q

Cranial nerve responsible for motor component of gag reflex

A

Vagus nerve

18
Q

CN responsible for sensory component of gag reflex

A

Glossopharyngeal

19
Q

CNVI innervates what muscle

A

Lateral rectus

20
Q

Eye abduction CN

A

CNVI

21
Q

CNVI palsy

A

Caused by microvascular ischemia
Often occurs in association with poorly controlled diabetes or hypertension

Horizontal diplopia that improves with losing affected eye
Inability to move affected eye laterally (look outward)

22
Q

CNIV palsy

A

Diplopia, outward tilt to affected eye
Tilt head away from affected side to compensate
Problems with reading and walking down stairs (down and in activities)

23
Q

CNIII palsy

A

ptosis, dilated pupils, eyes down and out (abducted and depressed)

24
Q

Which CN is efferent limb of Corneal reflex

A

facial nerve

25
Q

CNVII paralysis

A

Facial paralysis,
loss of test to anterior 2/3 of tongue,
hyperacusis,
abnormal corneal reflex

26
Q

sensory limb of corneal reflex

A

V1 of CNV

27
Q

CNVII palsy

A

lack of tearing
Inability to close the eye or move the forehead
sagging of eyebrow
abnormal smile/frown

28
Q

cochlear lesion?

A

Tinnitus and hearing loss

29
Q

Vestibular lesion?

A

Nystagmus and vertigo

30
Q

Accessory nerve palsy?

A

shoulder droop, impaired shoulder abduction

difficulty turning their head away from affected side