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brain and behaviour > Cranial nerves > Flashcards

Cranial nerves Flashcards

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1
Q

how do you say tunnel vision because of how it happens

A

bitemporal hemianopia

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2
Q

what is the outside view called

A

temporal view

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3
Q

what is the inside view called

A

nasal view

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4
Q

which 3 cranial nerves motor innervate the eyes

A

3, IV, VI
occulomotor, trochlear (hooks back on itself like a pulley) , abducent

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5
Q

what are the 6 eye muscles

A

4 x rectus
2 x oblique (sup and inf)

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6
Q

which muscles does occulomotor innervate

A

sim rectus, inf oblique

AND levator palpabrae superioris

simriol (OcculoMOSTor)

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7
Q

which nerve innervates lateral rectus

A

abducent (abducts eye)

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8
Q

therefore, which nerve innervates superior oblique (think what it does)

A

trochlear (goes back on itself)

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9
Q

how do you test motor eye nerves

A

H test. Always go sideways then up and down

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10
Q

which 2 muscles work togetehr to elevate eye

A

sup rectus and inf oblique

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11
Q

which 2 muscles work togetehr to depress eye

A

inf rectus and sup oblique

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12
Q

which muscles move the eyes right and left

A

med and lat rectus

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13
Q

if III palsy, what do you see

A

droopy eyelid, dilated pupil, down and out pupil

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14
Q

what is a ciliary body

A

changes shape of lense. contracted near vision, relaxed, distant vision

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15
Q

what parasympathetic innervation does III provide

A

constrictor pupillae, cilliary bodies

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16
Q

how do you find trochlear nerve

A

only one at the back of brainstem

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17
Q

what do no cranial nerves have

A

sympathetic fibres

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18
Q

symptom of IV palsy

A

diplopia looking downwards - trouble with stairs

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19
Q

which bit of trigeminal has motor fibres, what do they innervate

A

mandibular - muscles of masticatino

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20
Q

does trigeminal mostly do

A

sensory, face ->DCML

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21
Q

what is the venous drainage in the skull

A

sinuses not veins

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22
Q

what is weird about cavernous venous sinus

A

has ICA and III, IV and V1 and V2 in it

23
Q

where do the 3 eye motor nerves exit the skull

A

superior orbital fissure

24
Q

where does trigeminal nerve exit the skull

A

Superior orbital fissure
foramen rotundum
Foramen ovale

25
Q

where does the facial nerve originate

A

pons

26
Q

where does the facial nerve go

A

through internal acoustic meatus, temporal bone and then stylomastoid foramen

27
Q

what does the facial nerve NOT innervate

A

anything in the ear

28
Q

how can you tell the difference between Bell’s palsy and stroke

A

stroke = frontalis still works. Can move forrehead

29
Q

what is parasympathetic ftn of trigeminal

A

lacrimal

30
Q

which nerve is Bell’s palsy

A

facial

31
Q

which motor ftn facial nerve

A

facial expression

32
Q

which is the only nerve with 4 different fibres

A

glossopharyngeal

33
Q

what random selection of things does glossoph do?

A

parasympathetic: parotid gland
motor: stylopharyngeus
general sensory: posterior 1/3 tongue, pharynx, carotid bodies/sinus
special sensory: posterior 1/3 tongue

34
Q

what is nerve VIII

A

vestibulocochlear

35
Q

what does vestibulocochlear do

A

only special sensory

36
Q

where is hearing input

A

cochlea

37
Q

where is balance input

A

semi-circular acoustic canals

38
Q

where does vestibulocochlear emerge

A

internal acoustic meatus

39
Q

where do 9,10, 11 appear from skull

A

jugular foramne

40
Q

where does tongue point in hypoglossal palsy

A

towards damaged side

41
Q

where does uvula point in vagus palsy

A

away from lesion

42
Q

what is motor innervation of vagus

A

larynx, upper oesophagus (swallowing), soft palate, pharynx

43
Q

what is gen sensory vagus

A

larynx

44
Q

what vital function do you lose with vagus lesion

A

swallowing

45
Q

what is XI

A

spinal accessory

46
Q

what does XI do?

A

only motor. trapezius and sternocleidomastoid

47
Q

test for XI lesion

A

shrug shoulders against resistance

48
Q

where is XI?

A

between traps and SCM

49
Q

where does XI originate

A

5 cervical vertebrae

50
Q

symptoms of Horner’s syndrome

A

slight ptosis, anhydrosis, constricted pupil

51
Q

what is Horner’s syndrom

A

loss of sympathetic innervation to the head

52
Q

where does symp head innervation come from

A

thoracic area, goes up into head wrapped around ICA

53
Q

where are sympathetic nerves

A

T1-L2

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