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NPLEX I 2024 > Brain Vasculature and CNs > Flashcards

Brain Vasculature and CNs Flashcards

1
Q

where does the brain get its blood supply?

A

80% internal carotid arteries
20% vertebral arteries

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2
Q

after ascending to the brain, the internal carotid arteries split into >

A

the anterior and middle cerebral arteries

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3
Q

anterior cerebral arteries supply blood to

A

medial, frontal, parietal lobes

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4
Q

anterior cerebral arteries are connected by

A

anterior communicating artery

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5
Q

middle cerebral arteries supply blood to

A

lateral surface of cerebral hemispheres

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6
Q

before splitting into ant and middle cerebral arteries, the internal carotid arteries give rise to..

A

anterior choroidal arteries
posterior communicating arteries

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7
Q

what connects the internal carotid arteries to posterior cerebral arteries

A

posterior communicating arteries

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8
Q

the vertebral arties give rise to

A

post inf cerebellar arteries

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9
Q

post inf cerebellar arteries supply what and give rise to what

A

supply inf surface of cerebellum

give rise to post spinal arteries (supply post spinal cord)

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10
Q

the ant spinal artery branches off of what

A

vertebral arteries

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11
Q

the two vertebral arteries come together to form what, which gives rise to what

A

basilar artery > ant inf + sup cerebellar arteries

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12
Q

at the level of the midbrain, the basilar artery splits into what

A

two post cerebral arteries

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13
Q

posterior cerebral arteries supply blood to

A

medial and inferior surfaces of occipital and temporal lobes

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14
Q

what arteries form the circle of willis

A

ant cerebral
post cerebral
internal carotid

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15
Q

what benefit does the circle of willis offer

A

allow blood flow to continue if a major vessel is blocked on one side of the brain

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16
Q

CN I

A

olfactory
cribiform plate
sensory
smelling

17
Q

CN II

A

optic
optic canal
sensory
vision

18
Q

CN III

A

oculomotor
superior orbital fissure
motor
eye movement, pupil constriction

19
Q

CN IV (4)

A

trochlear
superior orbital fissure
motor
sup oblique eye muscles - abduct, depress, int rotate eyes (cross eye)

20
Q

CN V (5)

A

trigeminal
- opthalmic - sup orbital fissure (sensation to scalp, forehead, nose)
- maxillary - foramen rotundum (sensation to cheeks, eyelid, nasal mucosa, upper lip, palate
- mandibular - foramen ovale (sensation and motor function to ant 2/3 of tongue, skin over mandible, lower teeth, muscles of mastication)

21
Q

CN VI (6)

A

abducens
superior orbital fissure
motor
controls lateral rectus (lateral away from midline/nose)

21
Q

CN VII (7)

A

facial
internal acoustic meatus
sensation to part of ear, taste from ant tongue, mucus glands, motor function of the face

22
Q

CN VIII (8)

A

vestibulocochlear
internal acoustic meatus
sensory - hearing and balance

23
Q

CN IX (9)

A

glossopharyngeal
jugular foramen
post 1/3 of tongue sensation and taste, external ear, middle ear, carotid body of sinus, motor to parotid gland and stylopharyngeus

24
Q

CN X (10)

A

vagus
jugular foramen
both - sensory + movement of pharynx/larynx, sensory to thoracic and abdominal viscera, taste from epiglottis of tongue

25
Q

CN XI (11)

A

accessory
jugular foramen
motor to SCM and traps

26
Q

CN XII (12)

A

hypoglossal
hypoglossal canal
motor of tongue

27
Q

what nerve(s) is/are located at the following location: cribiform plate

A

olfactory (CN I)

28
Q

what nerve(s) is/are located at the following location: optic canal

A

optic nerve (CN II)

29
Q

what nerve(s) is/are located at the following location: superior orbital fissure

A

oculomotor (III)
trochlear (IV)
opthalmic (V-1; branch of trigeminal)
abducens (VI)

30
Q

what nerve(s) is/are located at the following location: foramen rotundum

A

maxillary (V2 - branch of trigeminal)

31
Q

what nerve(s) is/are located at the following location: foramen ovale

A

mandibular (V-3)

32
Q

what nerve(s) is/are located at the following location: internal acoustic meatus

A

facial (CNVII)
vestibulocochlear (VIII)

33
Q

what nerve(s) is/are located at the following location: jugular foramen

A

glossopharyngeal (CN IX)
vagus (CN X)
accessory (CNXI)

34
Q

what nerve(s) is/are located at the following location: hypoglossal canal

A

hypoglossal (CNXII)

35
Q

List CN 1-12

A

olfactory
optic
oculomotor
trochlear
trigeminal
abducens
facial
vestibulocochlear
glossopharyngeal
vagus
accessory
hypoglossal

Oh, Oh, Oh, To Touch And Feel Very Good Velvet and Hair

36
Q

CN 1-12 Motor/Sensory/Both

A

olfactory: S
optic: S
oculomotor: M
trochlear: M
trigeminal: B
abducens: M
facial: B
vestibulocochlear: S
glossopharyngeal: B
vagus: B
accessory: M
hypoglossal: M

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NPLEX I 2024 (23 decks)

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