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DEOH102 > Nerves -trigeminal > Flashcards

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
Q

What does mental nerve of V3 supply

A

SENSORY ONLY
Chin
Lower lip
Anterior teeth mucosa

26
Q

where does the mental nerve V3 form

A

Mental foramen

27
Q

What does incisive nerve of V3 supply

A

SENSORY ONLY
mandibular anterior teeth and premolars

28
Q

what do the mental nerve and incisive nerve join to form and where

A

Inferior alveolar nerve in the mandibular foramen

29
Q

What is treatment Bells palsy

A

Treatment - self limits - can get anti -inflammatory steroids ( usually help) or antiviral ( usually not help ) or physical therapy

30
Q

What type of nerve is the trigeminal nerve

A

Mixed nerve mostly sensory

31
Q

Name the pathway of the sensory branch of facial nerve ( chord tympani )

A

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

DEOH102 (25 decks)

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