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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
Where is the cavernous sinus?
On either side of the sella turcica, near the optic chiamsa
26
The danger triangle
bridge of the nose to the corners of the mouth, the veins here drain directly back into cavernous sinus; clotting causes danger
27
Which nerves are in danger from the danger triangle clotting
CN III, IV, V1, V2 and CN VI
28
blockage of CN VI causes what
lateral rectus m. cannot activate which should be abducting the eye so the result is double vision
29
result of cavernous thrombosis
double vision
30
When you lean forward venous blood moves forwards, why?
They are all valveless
31
pterygoid venous plexus
must be aware of when doing post. dental work
32
only branch of trigeminal that does not pass through the cavernous sinus
V3
33
Runs through the center of cavernous sinus
CN VI-Abducens
34
Second symptom of cavernous thrombosis
CN III is hit which paralyses the eye and disables elevation of eyelid
35
Third symptom of cavernous thrombosis
Painful stabbing pains of forehead from V1 and V2
36
innervates lateral rectus m.
CN VI-abducens
37
The smallest division of CNV
V1
38
sensory info of the dura mater
V1
39
dehydration will most affect
V1-meningeal branches, also V2 and V3 meningeal branches
40
innervates cornea
V1 also
41
4 major branches of V1 (do not worry about too much)
meningeal, lacrimal, frontal (supraorbital and supratrochlear), and nasociliary
42
Lacrimal n.
branch of V1; fibers go to lacrimal gland
43
sensory to and around the eye
V1
44
Pathway of V2
Out foramen ovale as infraorbital n. and then out the infraorbital foramen and then branches as alveolar n.
45
Brings sensory from upper lip and cheek
V2
46
branches of V2
Meningeal, zygomatic, post. sup. alveolar, infraorbital, greater palatine, lesser palatine, post. lateral nasal, nasopalatine, pharyngeal
47
V2 connects which two spaces
The middle cranial fossa and the pterygopalatine fossa
48
V3 connects what two spaces
middle cranial fossa to the infratemporal fossa
49
V1 connects what two spaces
middle cranial fossa to the orbit
50
Autonomic system is a ____ system
Two
51
Things to consider for autonomic nerves
Start-relay through which ganglion-and target what
52
How all parasympathetic nerves (except the main ones we know) get to places and where they go
Ride on V2 mainly and go to all mucous membranes (everywhere that is wet)
53
pterygopalatine ganglion
keeps everything moist and wet; associated with V2
54
sensory from ant nasal
V1 (ant ethmoidal n.) which keeps this part of the nose moist
55
burn roof of mouth?
Feel from greater and lesser palatine n. mainly from V2; dry mouth could be the result because loose nerve function
56
V3 carries what kind of sensory
very small motor and large sensory
57
Supplies sensory to TMJ
V3
58
muscles innervated by V3
muscles of mastication (temporalis, masseter, medial pterygoid) as well as tensor veli palatini, tensor tympani, mylohyoid, and ant. belly of digastric ms.
59
Branches of V3
Meningeal, n. to medial pterygoid, buccal, masseteric, deep temporal, n. to lateral pterygoid, auriculotemporal, lingual, inf. alveolar n.
60
Most nerves of V3 are motor or sensory?
Mixed
61
infra temporal fossa
below the temple, deep to mandible, below the masseter
62
Most important to knock out for extraction of the mandibular teeth to the midline ipsilateral
inf. alveolar n.
63
n. you will also hit when targetting inf. alveolar
lingual n. hitting ant 2/3 of ipsilateral tongue and the soft palate
64
Numb to chin means
all the rest is numb and 2/3 of tongue on ipsilateral side
65
infraorbital nerve knocks out what
all the lower teeth to the midline really
66
tensors are done by which n.
V3
67
Special visceral efferent (SVE) fibers from the motor nucleus pass in CN V3 to what
Muscles of mastification, oral floor muscles (mylohyoid and ant. digastric) middle ear muscle (tensor tympani) and palate muscle (tensor veli palatini
68
only m to open jaw
lateral pterygoid

Neuro Exam 3 (7 decks)

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