Neurology Flashcards

1
Q

what is CN1 and give major function

A

Oldfactory nerve - smell

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2
Q

what may cause CNI dysfunction

A

truama
parkinsons disease
covid 19

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3
Q

what is CNII and its major functions (3)

A

Optic nerve - vision
visual acuity
colour perception
visual field depth
(pupil dilation)

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4
Q

what symptoms and (1) sign would someone have with CNII poroblems

A

blurry vision
colour blindness
loss of field
sign = incorrect dilation of pupil in light

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5
Q

what are common causes of CNII dysfucntion

A

increased cranial pressure
strokes - vascular
malnutrition e.g. vitamin A

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6
Q

what is CNIII and give its main functions

A

Oculomotor nerve - controls 4 of the 6 eye muscles
superior rectus, inferior rectus, medial rectus, inferior oblique
AND superior eye lid elevator

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7
Q

what are signs and symptoms of CNIII dysfunction

A

pupil dilation
droopy eyelid (ptosis)
double vision

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8
Q

what are the main two types of aetiology for Oculomotor palsy

A

Medical - pupil sparing and painless
caused by ischaemia and strokes

Surgical - non-pupil sparing and painful
posterior communicating artery aneurysm

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9
Q

what is CNIV and its main function

A

Trochlear Nerve
controls 1 eye muscle - superior oblique

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10
Q

symptoms and signs of CNIV dysfunction

A

double vision when looking down e.g. at stairs
sign = tilts head to correct double vision

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11
Q

what is CNV and its function (3)

A

Trigeminal nerve
sensory innervation to face with 3 brnaches opthalmic, maxillary and mandibular
also motor to msucles of mastication
-masseter, pterygois and temporalis

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12
Q

what is CNVI and its function

A

Abducens nerve
longest in path length
lateral rectus eye muscle

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13
Q

symptom of CNVI dysfunction

A

lateral gaze double vision

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14
Q

what may cause CNVI dysfunction

A

trauma or inflammation
Raised ICP, swelling or blockage in the brain (likely to be affected as longest path)
stroke

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15
Q

what is CNVII and its function (3)

A

facial nerve
motor to the facial expression muscles
taste sensation chorda tympani to posterior 2/3 of tongue
parasympathetic to lacrimal, sublingual and submandibular salivary glands

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16
Q

what are the two types of CNVII dysfunction and which nerve does it affect

A

CNVII
UMN or LMN
UMN = upper motor neurone, within brain, sparing the forehead (frontalis)
LMN = lower motor neurone, outside of brain, weakness of eye and forehead

17
Q

what can cause CNVII aetiologies

A

UMN = storke, inflammation
LMN = bells palsy (inflammation), parotid mass

18
Q

what is CNVIII with function

A

vestibulocochlear nerve
vestibular and cochlear nerve for hearing and balance

19
Q

what is CNIX with function

A

glossopharyngeal nerve
sensation from tonsils, pharynx, middle ear, posterior 1/3 tongue
motor to stylopharyngeus
parasympathetic to parotid

20
Q

what symptoms and signs are there for CNIX dysfunction

A

symptoms = loss of taste at back of tongue, impaired swallowing
Signs = loss of gag, loss of taste posterior 1.3 of tongue

21
Q

what is CNX with function

A

vagus nerve
motor function in pharynx, larynx (gag reflex) and palatoglossus
coughing

22
Q

what are symptoms and signs of CNX dysfunction

A

smyptoms - change in speech and swallowing
signs = dysphonia, impaired cough, gag reflex

23
Q

what is CNXI with function

A

accessory nerve
motor to accessory muscles
trapezius and sternocleidomastoid

24
Q

what is CNXII with function

A

hypoglossal nerve
motor to tongue apart from palatoglossus (CNX)

25
what is tapais syndrome
palsy of CNX and CNXII
26
which muscles control msucles of tongue
CNX vagus (palatoglossus) CNXII hypoglossus (all other muscles)
27
what nerves control eye movements
CNIII - oculomotor nerve (superior rectus, medial rectus, inferior rectus, inferior oblique) CNIV - trochlear (superior oblqiue) CNVI - abducens (lateral rectus)
28
which CN are invovled in the eye
CNII - acuity, colour, visual fields CNIII - oculomotor nerve (superior rectus, medial rectus, inferior rectus, inferior oblique) CNIV - trochlear (superior oblqiue) CNVI - abducens (lateral rectus)
29
summarise the 12 cranial nerves
I = oldfactory = smell II = optic = acuity/colour/visual field III = occulomotor = 4/6 muscles of eye IV = trochlear = superior oblique V = trigmeinal = sensory to face and motor to mastication VI = abducens = lateral rectus VII = facial = motor to muscles of face expression and taste ant2/3 VIII = vestibulo-cochlear = hearing and balance IX = glossopharyngeal = sensory to larynx, tonsils, post1/3 tongue and motor to stylopharyngeus X = vagus = motor to larynx, pharynx, palataglossus XI = accessory = motor to sternocleidomastoid and trapezius XII = hypoglossal = all motor tongue apart palatoglossus
30
what are the 4 main reason for blackouts
syncope epelepsy non-epeleptic attacks (NEAD) (10% are acute symptomatic causes (subarachnoid haemorrhage, PE, adrenal insufficiency, hypoglycaemia, electrolyte disturbances, drugs, encephalitis)