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Oral anatomy > Nerves > Flashcards

Nerves Flashcards

1
Q

What are the 4 cranial nerves of the oral cavity?

A

Cranial nerve V, VII, IX, and XII

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2
Q

What is the name of CN V?

A

Trigeminal

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3
Q

What is the name of CN VII?

A

Facial

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4
Q

What is the name of CN IX?

A

Glossopharyngeal

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5
Q

What is the name of CN XII?

A

Hypoglossal

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6
Q

What are the three divisions of the trigeminal nerve?

A

Division I: ophthalmic (not to mouth)
Division II: maxillary (to all maxillary teeth)
Division III: mandibular (to all mandibular teeth and muscles of mastication)

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7
Q

These receptors in muscles and ligaments (including PDL) provide brain info of position of teeth and mandible at all times.

A

Proprioceptive receptors, division I and II

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8
Q

Through what does the trigeminal nerve division I leave the cranium?

A

Exits via superior orbital fissure (sphenoid)

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9
Q

Through what does the trigeminal nerve division II leave the cranium?

A

Exits via foramen rotundum (sphenoid) into the pterygopalatine space

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10
Q

What are the four branches of the trigeminal nerve division II?

A

First: pterygopalatine branch
Second: posterior superior alveolar (PSA)
Third: infraorbital nerve
Fourth: zygomatic nerve

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11
Q

What are the three branches of the pterygopalatine branch of the trigeminal nerve division II?

A

Descending palatine-greater palatine, nasopalatine, and middle and posterior or lesser palatine

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12
Q

The greater palatine nerve enters palate through what foramen?

A

Greater palatine foramen

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13
Q

The nasopalatine nerve enters the palate through what foramen?

A

Incisive foramen

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14
Q

The middle and posterior palatine nerve enters the palate through what foramen?

A

Lesser palatine foramen

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15
Q

What branch of maxillary division II supplies MSA and PSA?

A

Infraorbital branch

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16
Q

PSA nerve supplies what?

A

Maxillary molars (pulp and ligaments), alveolar bone, and facial gingiva

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17
Q

MSA nerve supplies what?

A

Premolars and pulp and mesiobuccal root of maxillary first molar as well as facial gingiva, bone and ligament

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18
Q

ASA nerve supplies what?

A

Anterior teeth facial gingiva and part of sinus

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19
Q

Terminal branches of infraorbital nerve supplies?

A

Upper lip and nose

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20
Q

The zygomatic branch of maxillary division II supplies what?

A

Skin of temporal and orbit region (not to mouth)

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21
Q

What are the 4 branches of the trigeminal nerve division III (mandibular nerve)?

A

A. auriculotemporal neve
B. buccal (or long buccal or buccinator) nerve
C. lingal nerve
D. inferior alveolar nerve

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22
Q

The mandibular division III: auriculotemporal nerve supplies what?

A

Provides sensation to outer ear and skin of the face anterior to the ear and provides proprioception to TMJ

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23
Q

The mandibular division III: buccal nerve branch supplies what?

A

Buccal gingiva of molars and premolars (and buccal mucosa and skin of cheeks up to corner of mouth (commisure)

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24
Q

The mandibular division III: lingual nerve branch supplies what?

A

General sensation to anterior two thirds of tongue and lingual gingiva in mandible

25
Q

What are the two terminal branches of the inferior alveolar nerve?

A

Mental branch and incisive branch

26
Q

The mental branch of the inferior alveolar nerve supplies what?

A

Goes to lower lip and anterior facial gingiva

27
Q

The incisive branch of the inferior alveolar nerve supplies what?

A

Anterior pulps

28
Q

The facial nerve exits the brain case via what opening?

A

Internal acoustic meatus into the petrous part of temporal bone

29
Q

How do the branches of the facial nerve exit the temporal bone?

A

Via petrotympanic fissure and stylomastoid foramen

30
Q

As the facial nerve branch exits the petrotympanic fissure what does it become?

A

Chorda tympani (taste)

31
Q

The glossopharyngeal nerve exits the cranium via what?

A

Jugular foramen

32
Q

The afferent fibers of the glossopharyngeal nerve go to what?

A

Go to posterior one-third of tongue for general sensation and taste also pharynx, and tonsils

33
Q

The secretory fibers of the glossopharyngeal nerve go to what?

A

Parotid gland

34
Q

The efferent fibers of the glossopharyngeal nerve go to what?

A

Muscles of the pharynx

35
Q

Facial nerve efferent fibers go to what?

A

Many muscles of facial expression posterior belly, stylohyoid and platysma

36
Q

Facial nerve secretory fibers go to what?

A

Submandibular and sublingual glands

37
Q

Hypoglossal nerve efferent fibers go to what?

A

Muscles that move the tongue

38
Q

What are the three afferent fibers that go to the tongue?

A

CN V: anterior two thirds general sensation
CN VII: anterior two thirds taste
CN IX: posterior two thirds general sensation and taste

39
Q

What is the efferent fiber that innervates the tongue?

A

CN XII tongue muscles

40
Q

Palatoglossal tongue muscle is innervated by what?

41
Q

What are the three branches of the external carotid artery?

A

Lingual, facial, and maxillary

42
Q

The lingual branch of the external carotid artery supplies what?

A

Tongue, floor of the mouth, sublingual gland and adjacent gingiva

43
Q

The facial branch of the external carotid artery supplies what?

A

Soft palate, tonsils, pharynx, chin, floor of the mouth, lips, and nose

44
Q

The maxillary branch of the external carotid artery supplies what?

A

All maxillary and mandibular teeth and muscles of mastication

45
Q

What are the arteries to the mandible?

A

The mandibular branch of the maxillary artery

46
Q

The pterygoid branch of the maxillary artery supplies what?

A

Muscles of mastication and buccinator muscle

47
Q

The pterygoid branch of the maxillary supplies what?

A

PSA (molars) ,
infraorbital branches ASA, MSA (premolars and anterior teeth); descending palatine (nasal cavity, palate and lingual gingiva)

48
Q

The pterygoid plexus vein drains what?

A

Blood from the upper part of the face, including maxillary teeth, and the inferior alveolar vein drains the mandible and lower teeth into the pterygoid plexus as well

49
Q

The pterygoid plexus vein empties into what?

A

The maxillary vein and into the retromandibular vein

50
Q

The facial vein drains what?

A

Runs parallel to the facial artey collect from the superior , inferior labial v. and muscles of mastication, nose and eyes

51
Q

The lingual vein drains what?

A

Blood from the tongue

52
Q

The common facial vein drains what?

A

All oral facial veins

53
Q

The common facial vein drains into what?

A

Internal jugular vein - superior vena cava -heart

54
Q

What are the four major lymph nodes of the head and neck?

A

Parotid, submandibular, submental, and cervical

55
Q

The parotid lymph nodes drain what?

A

Drain cheek, ear and eyelids

56
Q

The submental lymph nodes drain what?

A

Tip of tongue, anterior part of lower lip, anterior part of floor of mouth and mandibular incisors

57
Q

The submandibular lymph nodes drain what?

A

Drain other maxillary and mandibular teeth as well as posterior floor, tongue upper lip and part of lower lip

58
Q

The cervical lymph nodes drain what?

A

All lymph nodes of the head

Oral anatomy (4 decks)

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