Nerves -trigeminal Flashcards

1
Q

What 3 types of nerves are there?

A

Motor —-> muscle
Sensory—–> touch and taste
Parasympathetic—–> special sensation ie taste /secretions of glands

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2
Q

Trigeminal nerve is what cranial nerve

A

CNV

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3
Q

How many branches does the trigeminal nerve have

A

three

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4
Q

Name the three divisions of the trigeminal nerve

A

V1- ophthalmic
V2- maxillary
V3 - mandibular

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5
Q

name the three divisions of the trigeminal nerve and there exit points from skull

A

Ophthalmic V1- superior orbital fissure
Maxillary ( V2) - foramen rotundum
Mandibilar V3- foramen ovale

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6
Q

Name the area of supply of V1

A

Sensory to Superior 1/3 face - top of the nose to inner eye to top of frontal area
Supplies lacrimal gland

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7
Q

Name the area of supple of V2

A

Sensory Mid face - side nose - cheek and lower eyelid

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8
Q

Which division(s) of the trigiminal nerve is (are ) sensory only

A

V1/V2

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9
Q

Which division(s) of the trigiminal nerve had a motor supply

A

V3 only

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10
Q

Name the are of supply of the mandibular division of V3 and its nerve branches

A

V3 -Sensation to lower 1/3 face- lower lip/mandibular teeth /mandible( not angle ) meninges and temporal area-
Motor to muscles mastication

Lingual Nerve branch-Sensory to anterior 2/3 tongue and anterior hard palate

Inferior alveolar nerve branch -motor to myelohyoid and ant belly digastric

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11
Q

Name the branches off V3

A

Buccal
Muscular -> Deep temporal /Masseteric/LAteral pterygoid N
Auriculotemporal
Lingual
Inferior alveolar
Mylohyoid
Mental nerve
incisive

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12
Q

Name nerve supply tongue

A

Anterior 2/3- V3 ( lingual Nerve branch) general
-VII ( chord tympani ) - taste
Posterior 1/3 - glossopharyngeal nerve (taste and general sensation)

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13
Q

Name a cranial nerve problem of trigeminal nerve and its presentation

A

Trigeminal neuralgia ( Tic doulourex)
Sharp electric shock nerve pain down trigeminal Nerve distribution on 1side of face
Usually from compression/by a vessel inflammation or degeneration of the nerve
Usually right side and V2/V3> V1

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14
Q

How is trigeminal neuralgia treated

A

Anticonvulsant meds ( carbamazepine)
Botox injections
Surgery - laser or nerve removal

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15
Q

What cause of trigeminal neuralgia

A

Unknown

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16
Q

What does Buccal nerve of V3 supply

A

SENSORY ONLY
buccal mucosa/gingivia
skin cheek

17
Q

What are the muscular nerves off V3 and their supply

A

MOTOR ONLY
Deep tempural N- temporalis’
Masseteric N -masseter
Lateral pterygoid nerve - lateral pterygoid

18
Q

Where does the muscular branch V3 exit skull

A

Mandibular notch

19
Q

What does Auriculotemporal nerve of V3 supply

A

SENSORY ONLY
TMJ/External ear/scalp skin
Parotid gland - parasympathetic

20
Q

What does Lingual nerve of V3 supply

A

SENSORY ONLY
Anterior 2/3 body tongue ( general sensation)
Mouth floor and gingiva

21
Q

What does Inferior alveolar nerve of V3 supply

A

Mandibular molars sensation

22
Q

What 2 nerves form from the inferior alveolar Nerve and where

A

Mental and Incisive nerves in mental foramen

23
Q

Where is inferior alveolar nerve formed

A

Mandibular foramen

24
Q

What does mylohyoid nerve of V3 supply

A

MOTOR NERVE (MAD)
Myeloid
anterior digastric

25
What does mental nerve of V3 supply
SENSORY ONLY Chin Lower lip Anterior teeth mucosa
26
where does the mental nerve V3 form
Mental foramen
27
What does incisive nerve of V3 supply
SENSORY ONLY mandibular anterior teeth and premolars
28
what do the mental nerve and incisive nerve join to form and where
Inferior alveolar nerve in the mandibular foramen
29
What is treatment Bells palsy
Treatment - self limits - can get anti -inflammatory steroids ( usually help) or antiviral ( usually not help ) or physical therapy
30
What type of nerve is the trigeminal nerve
Mixed nerve mostly sensory
31
Name the pathway of the sensory branch of facial nerve ( chord tympani )
Arises off the nerve in the femoral bone as goes thru facial canal Travels in petrotympanic fissure. ( behind the TMJ ) Exits infra temporal fossa ( joins lingual nerve of V3 ) Pre and post ganglionic fibers supply - submandibular and sublingual glands Taste to anterior 2/3 body of tongue