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2.4 Anatomy > Trigeminal Nerve (CN V) and Facia Nerve (CN VII) > Flashcards

Trigeminal Nerve (CN V) and Facia Nerve (CN VII) Flashcards

1
Q

What is the origin of the trigeminal nerve?

A

Lateral surface of the pons of the midbrain by a motor and sensory root

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2
Q

What innervation does the trigeminal nerve provide?

A

Cutaneous innervation to the face and anterosuperior part of the scalp
Motor innervation to the muscles of mastication

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3
Q

What type neurons are found in sensory root of CN V?

A

Pseudounipolar neurons

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4
Q

What type neurons are found in motor root of CN V?

A

Multipolar neurons

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5
Q

Which ganglion is located in the distal end of the sensory root of trigeminal?

A

Trigeminal ganglion

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6
Q

What are the divisions of the trigeminal nerve?

A

CN Va - Ophthalmic
CN Vb - Maxillary
CN Vc - Mandibular

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7
Q

Which of the divisions of the trigeminal nerve are motor and sensory?

A

CN Va and Vb are solely sensory
CN Vc is largely sensory, but has a motor root

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8
Q

What is the origin of the ophthalmic nerve?

A

It arises from the trigeminal ganglion

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9
Q

How does CN Va enter the orbit and exit the cranium?

A

Superior orbital fissure

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10
Q

What are the divisions of the opthalmic nerve?

A

Frontal nerve
Nasociliary nerve
Lacrimal nerve

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11
Q

How does the maxillary nerve leave the cranium?

A

Foramen rotundum

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12
Q

Which ganglion is suspended by the maxillary nerve?

A

Pterygopalatine ganglion

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13
Q

How does the maxillary nerve enter the orbit?

A

Inferior orbital fissure

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14
Q

Where does the zygomatic nerve run after arising from CN Vb?

A

It continues into the infraorbital groove and foramen as the infraorbital nerve

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15
Q

Where does the maxillary nerve supply postganglionic fibres to?

A

Nasal palate
Palate
Upper alveolar teeth

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16
Q

How does the mandibular nerve exit the cranium?

A

Foramen ovale

17
Q

Which ganglia are suspended by CN Vc?

A

Otic ganglion - before branching
Submandibular ganglion on its branch

18
Q

What are the branches of the mandibular nerve?

A

Auriculotemporal nerve
Buccal nerve
Inferior alveolar nerve
Lingual nerve

19
Q

What does the auriculotemporal nerve supply?

A

Secretomotor fibres from CN IX to the parotid gland
Sensory innervation to the skin of the ear and temporal region

20
Q

What does the lingual nerve provide general sensation to?

A

Anterior 2/3 of the tongue

21
Q

What does the lingual nerve run between?

A

Medial pterygoid muscle and mandible

22
Q

Which ganglion is suspended by the lingual nerve?

A

Submandibular ganglion

23
Q

How does the lingual nerve provide parasympathetic innervation to the submandibular and sublingual glands?

A

It is joined by the chorda tympani, branch of the facial nerve, at the submandibular gland

24
Q

What does the inferior alveolar nerve supply?

A

Sensory innervation to the lower teeth

25
Q

In which foramen does the inferior alveolar nerve run?

A

It runs through the mandibular foramen

26
Q

Where does the facial nerve originate from?

A

It emerges from the brainstem at the pontomedullary junction

27
Q

What does the facial nerve provide motor innervation to?

A

Muscles of the face and neck

28
Q

What does the facial nerve provide secretomotor innervation to?

A

Salivary glands (submandibular and sublingual)
Lacrimal glands
Mucus glands lining nose
Paranasal sinuses
Palate
Pharynx

29
Q

What does the facial nerve provide special sensory innervation to?

A

Taste to anterior 2/3 of tongue and a few taste buds in the palate

30
Q

What does the facial nerve provide general sensation to?

A

Skin of the ear

31
Q

How does the facial nerve enter the skull?

A

It enters via the internal acoustic meatus

32
Q

Where does the facial nerve fun while inside the skull?

A

It runs within the facial canal in the petrous part of the facial bone

33
Q

What are the branches of the facial nerve within the facial canal?

A

Greater petrosal nerve
Chorda tympani

34
Q

How does the facial nerve exit the skull?

A

Through the stylomastoid foramen

35
Q

What are the branches of the facial nerve after exiting the cranium through the STF?

A

Posterior auricular
Nerve to posterior belly of digastric
Nerve to stylohyoid
Terminal branches

36
Q

What are the terminal branches of the facial nerve?

A

Temporal branch
Zygomatic branch
Upper and lower buccal branches
Marginal mandibular branch
Cervical branch

2.4 Anatomy (10 decks)

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