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Oral Anatomy > Nerves > Flashcards

Nerves Flashcards

1
Q

Nerves of the oral cavity

A
  1. trigeminal (CN V)
  2. facial (CN VII)
  3. glossopharyngeal (CN IX)
  4. hypoglossal (CN XII)
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2
Q

3 divisions of trigeminal nerve

A
  1. opthalmic n.
  2. maxillary n.
  3. mandibular n.
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3
Q

What is the opthalmic n. a good indication of?

A

overall health

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4
Q

What does the maxillary division of the trigeminal n. serve?

A

all maxillary teeth

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5
Q

What does the mandibular division of the trigeminal n. serve?

A

all mandibular teeth and muscles of mastication

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6
Q

What do proprioception receptors do?

A

provide the brain info of position of teeth and mandible at all times

in divisions I and II

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7
Q

Where does the opthalmic n. exit the cranium?

A

via the superior orbital fissure (sphenoid bone)

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8
Q

What does the opthalmic n. innervate?

A

upper third of face, superior eyelid, eyeball, scalp, nose, maxillary sinus, forehead

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9
Q

Where does the maxillary n. exit the cranium?

A

via the foramen rotundum into the pterygopalatine/maxillary space

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10
Q

What are the 4 branches of the maxillary n.?

A
  1. pterygopalatine br.
  2. post. sup. alveolar (PSA) n.
  3. infraorbital n.
  4. zygomatic n.
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11
Q

Branches of pterygopalatine

A
  1. greater palatine n. .
  2. nasopalatine n.
  3. middle and posterior OR lesser palatine n.
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12
Q

Where does the greater palatine n. enter the palate?

A

via greater palatine foramen

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13
Q

What does the greater palatine n. innervate?

A

mucosa of posterior 2/3 of hard palate and gingiva

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14
Q

Where does the nasopalatine n. enter the palate?

A

via the incisive foramen

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15
Q

What does the nasopalatine n. innervate?

A

anterior 1/3 of hard palate and gingiva

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16
Q

Where does the middle and posterior OR lesser palatine n. enter the palate?

A

via the lesser palatine foramina

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17
Q

What does the middle and posterior OR lesser palatine n. innervate?

A

tonsils and soft palate

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18
Q

Where does the PSA n. enter the maxillae?

A

behind and above 3rd molars via alveolar canals

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19
Q

What does the PSA n. innervate?

A

pulps, ligaments, buccal gingiva, and alveolar bone of maxillary molars

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20
Q

What is the exception to PSA n. innervation?

A

mesiobuccal root of max 1st molars

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21
Q

Branches of infraorbital n.

A
  1. middle superior alveolar (MSA)

2. anterior superior alveolar (ASA)

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22
Q

What does the MSA innervate?

A

premolar pulps and 1st molars

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23
Q

What does the ASA innervate?

A

anterior teeth, facial gingiva, part of sinus

24
Q

What does the zygomatic n. innervate?

A

skin of temporal and orbital regions

25
What pH will not work with anesthetic?
acidic
26
What are the two methods of placing anesthetic?
block: find nerve before it enters bone infiltration: place anesthetic very close to where nerve is on bone and allow for uptake
27
Branches of mandibular n.
1. auriculotemporal n. 2. buccal (long buccal, buccinator n.) 3. lingual n. 4. inferior alveolar n.
28
What does the auriculotemporal n. innervate?
outer ear and skin of face anterior to ear, provides proprioception to TMJ
29
Where does the buccal n. pass thru?
infratemporal space (between heads of lateral pterygoid mm.), goes lateral to ramus
30
What does the buccal n. innervate?
buccal gingiva of molars and premolars, and buccal mucosa and skin of cheeks to commissures
31
Where does the lingual n. pass?
medial to ramus, but lateral to medial pterygoid mm.
32
What does the lingual n. innervate?
anterior 2/3 of tongue, lingual gingiva of mandible (floor of mouth and lingual gingiva of all mandibular teeth)
33
What branch does the inferior alveolar n. give off before entering mandibular canal?
mylohyoid br.
34
What does the mylohyoid n. innervate?
mylohyoid m.
35
What does the inferior alveolar n. innervate once it enters the mandibular foramen?
mandibular molar and premolar pulps, ligaments, and alveolar bones
36
What are the two terminal branches of the inferior alveolar n.?
1. mental br. | 2. incisive br.
37
Where does the mental branch exit the mandible?
via mental formamen
38
What does the mental branch innervate?
lower lip, chin,and anterior facial gingiva (of chin and teeth)
39
What does the incisive branch innervate?
pulp, ligaments, and bone of incisors and canines
40
Motor branches of mandibular division
1. masseter m. and TMJ 2. poterior/anterior temporal m. 3. medial pterygoid 4. lateral pterygoid
41
Where does the facial n. exit the brain?
via internal acoustic meatus into the petrous part of temporal bone
42
What does the the facial n. become when it exits temporal bone via petrotympanic fissure?
becomes chorda tympani (taste)
43
What does the chorda tympani innervate?
along with lingual br of CN V, anterior 2/3 of tongue
44
What does the the facial n. become when it exits temporal bone via stylomastoid foramen?
efferent fibers exit
45
What do efferent fibers of the facial n. innervate?
muscles of facial expression posterior belley, stylohyoid and platysma
46
What do secretory fibers of facial n. innervate?
submandibular and sublingual secretory glands
47
Where does the glossopharyngeal n.exit the cranium?
via jugular foramen
48
What do the afferent fibers of the glossopharyngeal n. innervate?
sensation to tonsils, pharynx, and posterior 1/3 of tongue (taste also)
49
What do the efferent fibers of the glossopharyngeal n. innervate?
muscles of pharynx
50
What do the secretory fibers of the glossopharyngeal n. innervate?
parotid gland
51
Where does the hypoglossal n. exit the cranium?
via the foramen magnum
52
What do the efferent fibers of the hypoglossal n. innervate?
muscles of the tongue
53
What are all of the afferent fibers to the tongue?
1. CN V: anterior 2/3 sensation 2. CN VII: anterior 2/3 taste 3. CN IX: posterios 2/3 sensation and taste
54
What are the efferent fibers to the tongue?
CN XII: tongue muscles
55
What are the secretory fibers to the salivary glands?
CN VII: submandibular and sublingual glands | CN IX: parotid glands

Oral Anatomy (4 decks)

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