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Neuro Exam 3 > Trigeminal > Flashcards

Trigeminal Flashcards

1
Q

only motor section of Trigeminal

A

V3

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2
Q

largest (most myelinated) branch of the trigeminal

A

V3-75,000 myelinated fibers

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3
Q

smallest (least myelinated) branch of trigeminal

A

V1-25,000

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4
Q

Number of myelinated fibers of V2-

A

50,000

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5
Q

ONLY motor nerve of Trigeminal

A

V3

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6
Q

Passage into face of V1

A

into orbit through superior orbital fissure

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7
Q

Passage of V2 into vault

A

Foramen Rotundum

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8
Q

Passage of V3 into vault

A

Foramen ovale

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9
Q

Sensory distribution of V1 (ext and int)

A

forehead, upper eyelid, nose; internally– ant. nasal cavity/digital fossa

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10
Q

Sensory distribution of V2 (ext and int)

A

lower eyelid, upper eyelid; int - majority of nasal cavity, hard palate

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11
Q

Sensory distribution of V3 (ext and int)

A

Lower lip; int- oral cavity, ant 2/3 tongue, and floor

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12
Q

supplies sensory to ant 2/3 of tongue

A

V3

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13
Q

Sensory to hard palate

A

V2

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14
Q

Supplies most of the hard palate sensory

A

v2

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15
Q

Resident fiber

A

nerves that start from brainstem and stay on the trigeminal nerve

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16
Q

Acquired fiber

A

jump onto the trigeminal at a later point and are largely autonomic/parasympathetic

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17
Q

Special afferent nerves for taste are

A

acquired, thus added later on and does not originate at the brainstem

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18
Q

Parasympathetic to salivary glands and mucosal glands, and smooth muscle (spincter of pupil)

A

Acquired components CN-V

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19
Q

motor fibers and somatic sensory are _____ components

A

Resident components

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20
Q

makes up the cavernous sinus

A

dura mater

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21
Q

covers the trigeminal nerve and where it burrows into the cranial vault

A

Dura mater

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22
Q

Where the trigeminal ganglian sits

A

Meckel’s Cave/Trigeminal Cave-located in the middle carnial fossa which is a depression in the petrous temporal bone

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23
Q

Branches of the trigeminal that pass through the cavernous sinus foramen

A

V1, V2:

V3 passes inferiorly to the ovale

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24
Q

Cavernous sinus is made of

A

The sup. opthalmic and inf. opthalmic veins feed into sinus which sit on either side of the sella turcica and feed all other sinuses

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25
Q

Where is the cavernous sinus?

A

On either side of the sella turcica, near the optic chiamsa

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26
Q

The danger triangle

A

bridge of the nose to the corners of the mouth, the veins here drain directly back into cavernous sinus; clotting causes danger

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27
Q

Which nerves are in danger from the danger triangle clotting

A

CN III, IV, V1, V2 and CN VI

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28
Q

blockage of CN VI causes what

A

lateral rectus m. cannot activate which should be abducting the eye so the result is double vision

29
Q

result of cavernous thrombosis

A

double vision

30
Q

When you lean forward venous blood moves forwards, why?

A

They are all valveless

31
Q

pterygoid venous plexus

A

must be aware of when doing post. dental work

32
Q

only branch of trigeminal that does not pass through the cavernous sinus

A

V3

33
Q

Runs through the center of cavernous sinus

A

CN VI-Abducens

34
Q

Second symptom of cavernous thrombosis

A

CN III is hit which paralyses the eye and disables elevation of eyelid

35
Q

Third symptom of cavernous thrombosis

A

Painful stabbing pains of forehead from V1 and V2

36
Q

innervates lateral rectus m.

A

CN VI-abducens

37
Q

The smallest division of CNV

A

V1

38
Q

sensory info of the dura mater

A

V1

39
Q

dehydration will most affect

A

V1-meningeal branches, also V2 and V3 meningeal branches

40
Q

innervates cornea

A

V1 also

41
Q

4 major branches of V1 (do not worry about too much)

A

meningeal, lacrimal, frontal (supraorbital and supratrochlear), and nasociliary

42
Q

Lacrimal n.

A

branch of V1; fibers go to lacrimal gland

43
Q

sensory to and around the eye

A

V1

44
Q

Pathway of V2

A

Out foramen ovale as infraorbital n. and then out the infraorbital foramen and then branches as alveolar n.

45
Q

Brings sensory from upper lip and cheek

A

V2

46
Q

branches of V2

A

Meningeal, zygomatic, post. sup. alveolar, infraorbital, greater palatine, lesser palatine, post. lateral nasal, nasopalatine, pharyngeal

47
Q

V2 connects which two spaces

A

The middle cranial fossa and the pterygopalatine fossa

48
Q

V3 connects what two spaces

A

middle cranial fossa to the infratemporal fossa

49
Q

V1 connects what two spaces

A

middle cranial fossa to the orbit

50
Q

Autonomic system is a ____ system

A

Two

51
Q

Things to consider for autonomic nerves

A

Start-relay through which ganglion-and target what

52
Q

How all parasympathetic nerves (except the main ones we know) get to places and where they go

A

Ride on V2 mainly and go to all mucous membranes (everywhere that is wet)

53
Q

pterygopalatine ganglion

A

keeps everything moist and wet; associated with V2

54
Q

sensory from ant nasal

A

V1 (ant ethmoidal n.) which keeps this part of the nose moist

55
Q

burn roof of mouth?

A

Feel from greater and lesser palatine n. mainly from V2; dry mouth could be the result because loose nerve function

56
Q

V3 carries what kind of sensory

A

very small motor and large sensory

57
Q

Supplies sensory to TMJ

A

V3

58
Q

muscles innervated by V3

A

muscles of mastication (temporalis, masseter, medial pterygoid) as well as tensor veli palatini, tensor tympani, mylohyoid, and ant. belly of digastric ms.

59
Q

Branches of V3

A

Meningeal, n. to medial pterygoid, buccal, masseteric, deep temporal, n. to lateral pterygoid, auriculotemporal, lingual, inf. alveolar n.

60
Q

Most nerves of V3 are motor or sensory?

A

Mixed

61
Q

infra temporal fossa

A

below the temple, deep to mandible, below the masseter

62
Q

Most important to knock out for extraction of the mandibular teeth to the midline ipsilateral

A

inf. alveolar n.

63
Q

n. you will also hit when targetting inf. alveolar

A

lingual n. hitting ant 2/3 of ipsilateral tongue and the soft palate

64
Q

Numb to chin means

A

all the rest is numb and 2/3 of tongue on ipsilateral side

65
Q

infraorbital nerve knocks out what

A

all the lower teeth to the midline really

66
Q

tensors are done by which n.

A

V3

67
Q

Special visceral efferent (SVE) fibers from the motor nucleus pass in CN V3 to what

A

Muscles of mastification, oral floor muscles (mylohyoid and ant. digastric) middle ear muscle (tensor tympani) and palate muscle (tensor veli palatini

68
Q

only m to open jaw

A

lateral pterygoid

Neuro Exam 3 (7 decks)

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