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Y3 Neurology > Anatomy - Cranial Nerves > Flashcards

Anatomy - Cranial Nerves Flashcards

1
Q

what are the three parts of the course of a cranial nerve?

A

CNS
intracranial
extra cranial

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2
Q

what is the intracranial part of the course of a cranial nerve?

A

between the connection with the CNS and its base of skull foramina

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3
Q

what nerve exits the skull via the cribriform plate of the ethmoid bone?

A

CN I

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4
Q

what nerve exits the skull via the optic canal?

A

CN II

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5
Q

what nerve exits the skull via the superior orbital fissure?

A

CN III
CN IV
CN V1
CN VI

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6
Q

what nerve exits the skull via the foramen rotundum?

A

CN V2

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7
Q

what nerve exits the skull via the foramen ovale?

A

CN V3

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8
Q

what nerve exits the skull via the internal acoustic meatus?

A

CN VII

CN VIII

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9
Q

what nerve exits the skull via the jugular foramen?

A

CN IX
CN X
CN XI

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10
Q

what nerve exits the skull via the hypoglossal canal?

A

CN XII

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11
Q

what are the three divisions of the trigeminal nerve?

A

ophthalmic
maxillary
mandibular

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12
Q

where does the trigeminal nerve connect to the CNS?

A

pons

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13
Q

describe the intracranial part of the course of the trigeminal nerve?

A

passes inferior to the edge of the tentorium cerebella between the posterior and middle cranial fossae

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14
Q

where does CN V1 exit the skull?

A

superior orbital fissure

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15
Q

where does CN V2 exit the skull?

A

foramen rotundum

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16
Q

where does CN V3 exit the skull?

A

foramen ovale

17
Q

what nerve supplies the skin over the angle of the mandible?

A

great auricular nerve

18
Q

where does the facial nerve connect to the CS?

A

anterolaterally at the pontomedullary junction

19
Q

describe the intracranial part of the facial nerve course

A

goes directly into the internal acoustic meatus in the posterior cranial fossa

20
Q

what two base of skull foramina does the facial nerve exit the skull via?

A

internal acoustic meatus

stylomastoid foramen

21
Q

where does the glossopharyngeal nerve connect to the CNS?

A

the lateral aspect of the superior medulla oblongata

22
Q

where does the glossopharyngeal nerve exit the skull?

A

jugular foramen

23
Q

where does the vagus nerve connect to the CNS?

A

lateral aspect of the medulla oblongata

inferior to CN IX

24
Q

where does the vagus nerve exit the skull?

A

jugular foramen

25
Q

what is the most distal structure supplied with parasympathetics by the vagus nerve?

A

splenic flexure of the colon

26
Q

where do you touch to test the sensory supply of CN V1?

A

forehead
upper eyelid
tip of the dose

27
Q

where do you touch to test the sensory supply of CN V2?

A

mid cheek
lower eyelid
upper lip
nostrils

28
Q

where do you touch to test the sensory supply of CN V3?

A

lower cheek
lower lip
chin

29
Q

how do you test the motor function of the trigeminal nerve?

A

ask the patient to clench their teeth and then open their jaw against resistance

30
Q

how do you test the motor function of the facial nerve?

A

frown
close eyes tightly
smile
puff out cheeks

31
Q

what fibres are carried in the spinal accessory nerve?

A

motor

32
Q

how does the spinal accessory nerve connect with the CNS?

A

via cervical spinal nerve anterior rootlets

connects to the spinal cord

33
Q

describe the intracranial part fo the course of the spinal accessory nerve

A

ascends through the foramen magnum

travels towards the jugular foramen

34
Q

what is the base of skull foramen for the spinal accessory nerve?

A

the junction between the temporal bone and occipital bone

35
Q

what muscles are supplied by the spinal accessory nerves?

A

SCM

trapezius

36
Q

what fibre type is carried in the hypoglossal nerves?

A

motor fibres

37
Q

how does the hypoglossal nerve connect to the CNS?

A

via rootlets that attach laterally to the pyramids of the medulla oblongata

38
Q

what is the base of skull foramen for the hypoglossal nerve?

A

hypoglossal canal

Y3 Neurology (31 decks)

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