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OSCE BDS2 > Trigeminal Nerve > Flashcards

Trigeminal Nerve Flashcards

1
Q

what does the sensory root of the trigeminal nerve innervate?

A

skin of face, oral, nasal and sinus, mucosa and teeth

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2
Q

what does the motor root of the trigeminal nerve innervate?

A

muscles of mastication and 3 other muscles

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3
Q

what are the 3 divisions of the trigeminal nerve

A

ophthalmic, maxillary and mandibular

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4
Q

what are the 3 foramen involved with the trigeminal nerve?

A

mental foramen/ mandibular foramen , infraorbital foramen, supraorbital foramen

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5
Q

what bones form the hard palate

A

palatine process of maxilla and horizontal plate of palatine bone

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6
Q

where does the trigeminal nerve emerge from on the brainstem?

A

mid pons

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7
Q

where do the sensory nerves of the trigeminal nerve emerge from?

A

mid pons, mid brain and medulla

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8
Q

what does the mesencephalic nucleus on the sensory nerve innervate?

A

proprioception

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9
Q

what does the chief sensory nucleus on the sensory nerve innervate?

A

discriminative touch

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10
Q

what does the spinal nucleus on the sensory nerve innervate?

A

pain and temperature

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11
Q

where does the trigeminal ganglion lie?

A

the petrous temporal bone in a cave of dura mater (Meckels cave)

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12
Q

what does CN V1 pass through?

A

superior orbital fissure

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13
Q

what does CN V2 pass through

A

foramen rotundum

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14
Q

what does CN V3 pass through

A

foramen ovale

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15
Q

what are the divisions of CN V1 (ophthalmic divisions)

A

frontal nerve -> supraorbital and supratrochlear, lacrimal nerve, nasociliary nerve, infratrochlear nerve

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16
Q

what does the ophthalmic nerve supply?

A

sensory to skin of vertex and upper eyelid and forehead

17
Q

what do the supratrochlear and lacrimal nerve and supraorbital nerves supply?

A

vertex, forehead and upper eyelids

18
Q

what does the infratrochlear nerve supplies?

A

skin at medial angle of eye and adjacent root of nose

19
Q

what supplies the tip of the nose?

A

external nasal branch by anterior ethmoidal branch of nasociliary branch of CN V1

20
Q

what branch of the trigeminal nerve reaches the pterygopalatine fossa?

A

CN V2

21
Q

what does CN V2 innervate?

A

lateral forehead, zygomatic region, lower eyelid, side of nose, cheek, upper lip

22
Q

what are the alveolar branches of CN V2

A

posterior superior alveolar, middle superior alveolar, anterior superior alveolar

23
Q

what are the palatine branches of CN V2

A

greater and lesser palatine nerves

24
Q

what is the upper gingivae supplied by?

A

nasopalatine nerve and greater palatine nerve and superior alveolar nerve

25
Q

what is the soft palate supplied by?

A

lesser palatine nerve

26
Q

what are the branches of CN V2

A

zygomatic nerve, infra-orbital nerve, palatine nerves, superior alveolar nerve

27
Q

what are the boundaries of the infratemporal fossa?

A

ramus of mandible, lateral pterygoid plate of sphenoid bone, posterior aspect of maxilla, tympanic plate, mastoid and styloid processes, infratemporal crest of sphenoid bone, angle of mandible

28
Q

what are the 3 parts of the mandibular division?

A

main trunk, anterior trunk and posterior trunk

29
Q

what is in the main trunk of CN V3

A

meningeal branch, branch to tensor tympani, branch to tensor veli palatini, nerve to medial pterygoid

30
Q

what is in the anterior trunk of CN V3

A

deep temporal nerves, nerve to lateral pterygoid, long buccal nerve, masseteric nerve

31
Q

what is in the posterior trunk of CN V3

A

auriculotemporal nerve, lingual nerve, inferior alveolar nerve

32
Q

what is the sensory nerve supply to oral cavity?

A

buccal nerve to cheek and lateral gum

IAN to lower teeth, skin and lower lip

33
Q

what does the inferior alveolar nerve give motor innervation to?

A

mylohyoid and anterior belly of digastric

OSCE BDS2 (30 decks)

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