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3 Anatomy > Floor of the mouth and tongue > Flashcards

Floor of the mouth and tongue Flashcards

1
Q

what is the anterior boundary of the oral cavity?

A

alveolar and dental arches of the mandible and maxilla

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2
Q

what is the posterior boundary of the oral cavity?

A

oropharyngeal isthmus

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3
Q

what is the oropharyngeal isthmus?

A

space between the oral cavity and the oropharynx behind

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4
Q

what forms the roof of the oral cavity?

A

hard and soft palate

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5
Q

what forms the floor of the oral cavity?

A

tongue
muscles of the floor of the mouth

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6
Q

the buccinator is lined internally with what?

A

buccal mucosa

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7
Q

the palate is lined by what?

A

palatal mucoperiosteum as mucosa has close relationship with periosteum of maxilla and palatine bones

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8
Q

name the mucosa that lines the tongue

A

lingual mucosa

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9
Q

name this mucosa

A

upper labial alveolar mucosa

continuous with upper labial mucosa

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10
Q

name these structures

A

labial frenula (single = frenulum)

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11
Q

what are labial frenula?

A

connective tissue bands that anchor the mucosa to the bone

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12
Q

name this part of the gingiva

A

free gingiva

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13
Q

name this part of the gingiva

A

attached gingiva

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14
Q

name this structure

A

mucogingival junction

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15
Q

the area at the base of a gingival pocket is called?

A

gingival sulcus

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16
Q

name this mucosa

A

buccal alveolar mucosa

continuous with buccal mucosa

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17
Q

name this mucosa

A

lower labial alveolar mucosa

continuous with lower labial mucosa

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18
Q

name this mucosa

A

buccal alveolar mucosa

continuous with buccal mucosa

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19
Q

why can you see the underlying vasculature of mucosa?

A

non-keratinised

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20
Q

name this embryological structure of the tongue

A

fimbriated folds

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21
Q

name this structure that attaches the tongue to the floor of the mouth

A

frenulum of tongue

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22
Q

name this structure which is the deepest part of the floor of the mouth

A

lingual sulcus

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23
Q

name this structure

A

sublingual folds

openings for ducts of sublingual gland

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24
Q

name this mucosa

A

mucosa of the floor of the mouth

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25
Q

the mucosa of the floor of the mouth is very thin, how is this beneficial medically?

A

administration of lipid soluble drugs

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26
Q

name this structure

A

sublingual papilla

openings for submandibular gland duct

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27
Q

name this gingiva

A

lingual gingiva

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28
Q

name this mucosa

A

lingual alveolar mucosa

continuous with mucosa of floor of the mouth

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29
Q

name this vein

A

deep lingual vein

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30
Q

name this muscle

A

anterior belly of digastric

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31
Q

name this artery

A

facial artery

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32
Q

name this structure

A

submandibular gland
superficial part

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33
Q

name these muscles and what joins them

A

mylohyoid muscles
midline raphe

34
Q

name this structure on the mandible

A

left digastric fossa

35
Q

what innervates the anterior belly of digastric?

A

CNV3 nerve to mylohyoid

36
Q

name this muscle

A

right and left geniohyoid muscle

37
Q

what are the attachments of the geniohyoid muscle?

A

genial tubercles of mandible

hyoid bone

38
Q

name this structure

A

sublingual gland

39
Q

does the sublingual gland sit above or below the mylohyoid muscle?

A

above the mylohyoid

40
Q

does the submandibular gland sit below or above the mylohyoid muscle?

A

deep part of submandibular gland sits above the mylohyoid

superficial part sits below the mylohyoid

41
Q

name this reflected muscle

A

mylohyoid

42
Q

name this structure

A

deep part of submandibular gland

43
Q

the submandibular duct and lingual nerve cross over in the floor of the mouth, which one goes over the other?

A

submandibular duct crosses over the lingual nerve

44
Q

explain the innervation to the submandibular and sublingual glands

A
  • CNVII branch chorda tympani
  • Presynaptic parasympathetic fibres
  • Hitches a ride with lingual nerve
  • Submandibular ganglion
  • Postsynaptic parasympathetic fibres to glands
45
Q

explain the innervation to the anterior 2/3 of tongue

A
  • Special sensory fibres
  • Lingual nerve
  • Chorda tympani branch of CNVII
  • Central nervous system
46
Q

the tongue is divided into what

A

anterior 2/3
posterior 1/3

47
Q

what divides the anterior 2/3 and posterior 1/3 of tongue?

A

terminal sulcus

48
Q

what is the foramen caecum?

A

the middle point of the terminal sulcus

formed during embryological development from the thyroid descending

49
Q

name this structure

A

terminal sulcus

50
Q

name this structure

A

foramen caecum

51
Q

general and taste sensation of the posterior 1/3 of tongue is supplied by what nerve?

A

CNIX

52
Q

in the posterior 1/3 of tongue what is located under the mucosa?

A

lingual tonsil

53
Q

what nerve supplies the general sensation of the anterior 2/3 of tongue?

A

CNV3 lingual nerve

54
Q

what nerve supplies the taste sensation of the anterior 2/3 of tongue?

A

CNVII
chorda tympani
lingual nerve

55
Q

name these taste buds

A

vallate papillae

56
Q

what nerve supplies the vallate papillae?

A

CNIX

57
Q

name these taste buds

A

foliate papillae

58
Q

what nerve supplies the foliate papillae?

A

CNVII via chorda tympani

59
Q

name these taste buds

A

fungiform papillae

60
Q

what nerve supplies the fungiform papillae?

A

CNVII via chorda tympani

61
Q

name these structures that have touch sensitivity

A

filiform papillae

62
Q

what nerve innervates the filiform papillae?

A

CNV3 as sense of touch

63
Q

describe the rout of CNXII to tongue

A
  • Passes between the internal carotid artery and internal jugular vein
  • Passes deep to posterior belly of digastric
  • Into submandibular region
  • Passes lateral to hyoglossus muscle
  • Above/deep to mylohyoid to tongue
64
Q

where do the intrinsic muscle of the tongue originate and insert?

A

within the tongue

65
Q

where do the extrinsic muscles of the tongue originate and insert?

A

originate outwith the tongue

insert into the tongue

66
Q

what is the tongue?

A

a mass of skeletal muscle covered by mucosa

67
Q

what do the intrinsic muscles of the tongue do?

A

alter the shape of the tongue

longitudinal muscles make it short and thick

transverse and vertical muscles make it long and narrow

68
Q

name this extrinsic muscle of the tongue

A

palatoglossus

69
Q

what nerve innervates palatoglossus?

A

CNX

70
Q

name this extrinsic muscle of the tongue

A

styloglossus

71
Q

what nerve innervates styloglossus?

A

CNXII

72
Q

name this extrinsic muscle of the tongue

A

genioglossus

73
Q

what nerve innervates genioglossus?

A

CNXII

74
Q

name this extrinsic muscle of the tongue

A

hyoglossus

75
Q

what nerve innervates hyoglossus?

A

CNXII

76
Q

the extrinsic muscles of the tongue are innervated by what nerve?

A

CNXII
except palatoglossus is CNX

77
Q

what are the extrinsic muscles of the tongue responsible for?

A

sticking the tongue out

78
Q

name this muscle

A

intrinsic muscles of the tongue

79
Q

name this muscle

A

genioglossus

80
Q

name this muscle

A

mylohyoid

81
Q

name this muscle

A

geniohyoid

82
Q

how is CNXII clinically tested?

A

ask patient to stick tongue straight out
if one of the CNXII nerves is damaged the tongue tip will point towards the side of the injured nerve

3 Anatomy (9 decks)

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