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Disorders > Cranial Nerves > Flashcards

Cranial Nerves Flashcards

1
Q

CN I

A

Olfactory

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2
Q

CN I function is…

A

Smell

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3
Q

CN I travels…

A

Inferior surface of the brain to synapse at the olfactory bulbs then to the pyriform cortex

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4
Q

CN II

A

Optic

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5
Q

CN II function is…

A

Vision

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6
Q

CN I issues is…

A

Anosmia

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7
Q

CN II travels to…

A

Synapses at thalamus before information is carried to occipital lobe

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8
Q

CN II issues is…

A

Blindness and visual field cuts

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9
Q

CN III

A

Oculomotor

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10
Q

CN III function

A

Eye movement and lifts eyelids

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11
Q

CN III issues is…

A

Strabismus (eyes do not move together), diploipia (double vision)

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12
Q

CN IV

A

Trochlear

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13
Q

CN IV function…

A

Controls superior oblique muscle-internal rotation of the eye, eye depression, lateral eye movement

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14
Q

CN IV travels to…

A

Crosses the midline before exiting the brainstem

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15
Q

Cn IV damage may cause…

A

Nucleus damage affects the contralateral eye and nerve damage from this CN will affect the ipsilateral eye

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16
Q

CN V function

A

Sensory- touch, temperature, pain, proprioception information from the head (includes: oral and nasal cavities, sinuses, teeth, anterior 2/3 of the tongue, anterior 1/2 of the pinna, external auditory meatus, external surface of the ear drum)
Motor-Assists with mastication, tenses soft palate and tenses tensor tympani

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17
Q

CN V clinical signs are…

A

Trigeminal neuralgia, trismus, paresis and sensory loss

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18
Q

CN V

A

Trigeminal

19
Q

CN VI

A

Abducens

20
Q

Cn VI function/…

A

Innervates lateral rectus muscle (eye movement laterally)

21
Q

CN VI clinical signs…

A

Medial strabismus, diplopia and affected eye drifts to midline

22
Q

CN VII

A

Facial

23
Q

CN VII function…

A

Sensory- taste from anterior 2/3 of the tongue, sensation from small area near ear canal
Motor- facial expression, salivation and tear production

24
Q

CN VII travels…

A

Sensory- 2/3 of anterior tongue
Motor- muscles of facial expression, stapedius, and posterior belly of digastric

25
Q

CN VII clinical signs…

A

Loss of taste of anterior 2/3 of the tongue, UMN (weakness to contralateral lower face), LMN (weakness to entire ipsilateral face, hyperacusis, dry eye, loss of corneal blink reflex

26
Q

CN VIII

A

Vestibulocochlear

27
Q

CN VIII function

A

Serves audition and balance

28
Q

CN VIII clinical signs…

A

SNHL, vestibular disruption

29
Q

Cn IX

A

Glossopharyngeal

30
Q

Cn IX function

A

Sensory- sensation of the middle ear, pharynx, posterior 1/3 of tongue, taste from posterior 1/3 of the tongue, autonomic functions of BP and oxygen pressure
Motor- elevates pharynx for talking, swallowing, contributes to gag reflex

31
Q

CN IX travels to

A

Innervates the stylophryngeus

32
Q

Cn IX clinical signs

A

Loss of taste to posterior 1/3 of the tongue, diminished gag reflex, reduced pharyngeal elevation while swallowing

33
Q

CN X

A

Vagus

34
Q

CN X function

A

Sensory- sensation from pharynx, meninges, small region near ear canal, taste from epiglottis and pharynx
Motor- swallowing and phonation

35
Q

CN X travels

A

Innervation of pharyngeal and laryngeal muscles and palate; innervation to the heart, lungs and digestive tract

36
Q

CN X clinical signs

A

UMN bilateral (hypernasal speech, weak, breathy voice), LMN unilateral (uvula points to intact side, breathy voice), LMN bilateral (soft palate does not rise, voice is weak and breathy)

37
Q

Cn XI

A

Spinal accessory

38
Q

CN XI function

A

Turns head in opposite direction, elevates shoulder

39
Q

CN XI travels

A

Innervates sternocleidomastoid and upper trapezius

40
Q

CN XII

A

Hypoglossal

41
Q

CN XII function

A

Muscles of the tongue

42
Q

CN XII travels

A

Innervates all intrinsic and extrinsic (except palatoglossus) muscles of the tongue

43
Q

CN XII clinical signs

A

UMN (contralateral tongue weakness), LMN (ipsilateral tongue weakness and atrophy), neuralgia
*Tongue will deviate to the weak side

Disorders (3 decks)

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