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MD4001 Anatomy > Cranial nerves 2 > Flashcards

Cranial nerves 2 Flashcards

1
Q

what is the nervus intermedius

A

part of the facial nerve which carries sensory and parasympathetic supply

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2
Q

what is the function of cranial nerve 5 mesencephalic nucleus

A

proprioception

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3
Q

what is the function of the principle sensory nucleus for cranial nerve 5

A

discriminitive touch

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4
Q

what is the function of the spinal nucleus of cranial nerve 5

A

pain and temperature as well as conscious sensation for the viscera supplied by 9 and 10

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5
Q

what is the function of the three divisions of the trigeminal nerve

A

general somatic sensation to the face, head and associated orbital, nasal and oral cavities

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6
Q

V1

A

opthalmic (sensation)

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7
Q

v2

A

maxillary (sensation)

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8
Q

v3

A

manidibular (motor and sensory)

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9
Q

what is the sensory supply of the skin over the angle of the mandible

A

greater auricular and transverse cervical branch of the cervical plexus not the trigeminal nerve

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10
Q

what is meckels cave

A

on the apex of the petrous temporal bone where the trigeminal ganglion lies in a cave of dura mater

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11
Q

how does the opthalmic division reach the superior orbital fissure

A

passes anteriorly on the lateral wall of the cavernous sinus

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12
Q

how does the maxillary division reach the foramen rotundum

A

passes anteriorly on the lateral wall of the cavernous sinus

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13
Q

if all 3 trigeminal divisions are affected where must the lesion be

A

pons or skull base

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14
Q

describe the relations of the cavernous sinus

A 
sphenoid sinus (air)
internal carotid artery
V1
V2
cranial nerve 3 and 4
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15
Q

if the trigeminal divisions are affected in the cavernous sinus what other cranial nerves would you expect to be affected

A

3 and 4 (occulomotor and trochlear)

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16
Q

describe the course of the opthalmic nerve

A

passes throught the cavernous sinus, picks up sympathetic fibres from the carotid plexus

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17
Q

what are the divisions of the opthalmic nerve

A

lacrimal nerve
frontal nerve
nasocilliary nerve

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18
Q

what is the sensory supply to the forehead and upper eyelid

A

supra trochlea, supra orbital and lacrimal nerves

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19
Q

what is the nerve supply of the tip of the nose

A

external nasal branch of the anterior ethmoidal branch of the nasocillary branch of the opthalmic branch of the trigeminal nerve

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20
Q

what is the nerve supply of corneal sensation

A

nasocilliary

21
Q

what does shingles on the tip of the nose suggest

A

shingles may develop on the cornea

22
Q

what nerve dilates the pupil

A

sympathetics in the nasocilliary branch of V1 and then the long ciliary nerves dilate the pupil

23
Q

what is the first limb of the corneal reflex

A

V1 opthalmic

24
Q

what is the nerve supply of the skin of the upper eyelid and underlying conjunctiva

A

opthalmic V1

25
Q

what does the ethmoidal nerve supply

A

ethmoidal sinuses, lateral wall of the nasal cavity, nasal septum

26
Q

what does the lacrimal nerve carry

A

parasympathetic secretomotor fibres from the pterygopalatine ganglion to the lacrimal gland

27
Q

where does V2 end up

A

foramen rotundum and pterygopalatine fossa

28
Q

s

A

s

29
Q

what are the limbs of the corneal reflex

A

V1 and 7

30
Q

where is the marginal mandibular nerve

A

inferior to the mandible and overlies submandibular gland

31
Q

what could happen after surgery to the submandibular gland

A

damage to marginal mandibular causing paralysis of lower lip muscles so dribbling

32
Q

what foramina does cn 7 travel through

A

stylomastoid foramen and internal acoustic meatus

33
Q

what are the effects of the facial nerve injury distal to the stylomastoid foramen

A

ipsilateral facial muscle paralysis

34
Q

what are the effects of a facial nerve injury within the petrous bone

A

ipsilateral facial muscle paralysis
hyperacusis
taste disturbances

35
Q

frontalis and orbicularis oculi

A

temporal

36
Q

orbicularis oculi and upper lip muscles

A

zygomatic

37
Q

buccinators and lip muscles

A

buccal

38
Q

lower lip muscles

A

marginal mandibular

39
Q

platysma

A

cervical

40
Q

what nerve is at risk in forceps delivery

A

7

mastoid process hasn’t formed

41
Q

what structures travel through the internal acoustic meatus

A

7,8 labyrinthine artery

42
Q

superior salivatory nucleus (7) in the pons

A

psymp, secretomotor to lacrimal gland, nasal and oral cavities, submandibular and sublingual gland

43
Q

what muscles are supplied by the facial nerve apart from facial expression

A

stapedius, stylohyoid, post belly digastric (2nd pharyngeal arch)

44
Q

what are the limbs of the jaw jerk

A

mesencephalic nucleus of trigeminal

trigeminal motor nucleus

45
Q

what arch are the muscles of mastication derived from

A

1st pharyngeal arch

46
Q

what does v3 supply apart from the muscles of mastication

A

tensor tympani in the middle ear

tensor palate, mylohyoid and ant belly of digastric

47
Q

what division is trigeminal neuralgia most often found in

A

v3

48
Q

what supplies general sensation to the tongue, floor of the mouth, lower teeth and gums and carries chorda tympani (taste, secretomotor)

A

V3

49
Q

what structures does V3 travel through

A

foramen ovale

into the infratemporal fossa

MD4001 Anatomy (45 decks)

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