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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
Q

What pH will not work with anesthetic?

A

acidic

26
Q

What are the two methods of placing anesthetic?

A

block: find nerve before it enters bone
infiltration: place anesthetic very close to where nerve is on bone and allow for uptake

27
Q

Branches of mandibular n.

A
  1. auriculotemporal n.
  2. buccal (long buccal, buccinator n.)
  3. lingual n.
  4. inferior alveolar n.
28
Q

What does the auriculotemporal n. innervate?

A

outer ear and skin of face anterior to ear, provides proprioception to TMJ

29
Q

Where does the buccal n. pass thru?

A

infratemporal space (between heads of lateral pterygoid mm.), goes lateral to ramus

30
Q

What does the buccal n. innervate?

A

buccal gingiva of molars and premolars, and buccal mucosa and skin of cheeks to commissures

31
Q

Where does the lingual n. pass?

A

medial to ramus, but lateral to medial pterygoid mm.

32
Q

What does the lingual n. innervate?

A

anterior 2/3 of tongue, lingual gingiva of mandible (floor of mouth and lingual gingiva of all mandibular teeth)

33
Q

What branch does the inferior alveolar n. give off before entering mandibular canal?

A

mylohyoid br.

34
Q

What does the mylohyoid n. innervate?

A

mylohyoid m.

35
Q

What does the inferior alveolar n. innervate once it enters the mandibular foramen?

A

mandibular molar and premolar pulps, ligaments, and alveolar bones

36
Q

What are the two terminal branches of the inferior alveolar n.?

A
  1. mental br.

2. incisive br.

37
Q

Where does the mental branch exit the mandible?

A

via mental formamen

38
Q

What does the mental branch innervate?

A

lower lip, chin,and anterior facial gingiva (of chin and teeth)

39
Q

What does the incisive branch innervate?

A

pulp, ligaments, and bone of incisors and canines

40
Q

Motor branches of mandibular division

A
  1. masseter m. and TMJ
  2. poterior/anterior temporal m.
  3. medial pterygoid
  4. lateral pterygoid
41
Q

Where does the facial n. exit the brain?

A

via internal acoustic meatus into the petrous part of temporal bone

42
Q

What does the the facial n. become when it exits temporal bone via petrotympanic fissure?

A

becomes chorda tympani (taste)

43
Q

What does the chorda tympani innervate?

A

along with lingual br of CN V, anterior 2/3 of tongue

44
Q

What does the the facial n. become when it exits temporal bone via stylomastoid foramen?

A

efferent fibers exit

45
Q

What do efferent fibers of the facial n. innervate?

A

muscles of facial expression posterior belley, stylohyoid and platysma

46
Q

What do secretory fibers of facial n. innervate?

A

submandibular and sublingual secretory glands

47
Q

Where does the glossopharyngeal n.exit the cranium?

A

via jugular foramen

48
Q

What do the afferent fibers of the glossopharyngeal n. innervate?

A

sensation to tonsils, pharynx, and posterior 1/3 of tongue (taste also)

49
Q

What do the efferent fibers of the glossopharyngeal n. innervate?

A

muscles of pharynx

50
Q

What do the secretory fibers of the glossopharyngeal n. innervate?

A

parotid gland

51
Q

Where does the hypoglossal n. exit the cranium?

A

via the foramen magnum

52
Q

What do the efferent fibers of the hypoglossal n. innervate?

A

muscles of the tongue

53
Q

What are all of the afferent fibers to the tongue?

A
  1. CN V: anterior 2/3 sensation
  2. CN VII: anterior 2/3 taste
  3. CN IX: posterios 2/3 sensation and taste
54
Q

What are the efferent fibers to the tongue?

A

CN XII: tongue muscles

55
Q

What are the secretory fibers to the salivary glands?

A

CN VII: submandibular and sublingual glands

CN IX: parotid glands

Oral Anatomy (4 decks)

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