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Anatomy > A32- The Floor of the Mouth and Tongue > Flashcards

A32- The Floor of the Mouth and Tongue Flashcards

1
Q

what is the anterior boundary of the oral cavity?

A

alveolar/dental arches of mandible & maxilla

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2
Q

what is the posterior boundary of the oral cavity?

A

oropharangeal isthmus - space bounded laterally by palatoglossal folds

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3
Q

what is the roof of the oral cavity?

A

hard palate & soft palate

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4
Q

what is the floor of the oral cavity?

A

tongue, muscles of floor of mouth

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5
Q

what is the lateral border of the oral cavity?

A

oral mucosa of the buccinator

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6
Q

what is the importance of the papilla on the mucosa of the buccinator?

A

opening of the parotid duct

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7
Q

what is the deepest past of the vestibule?

A

buccal sulcus

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8
Q

what mucosa lines the hard palate?

A

palatal mucoperiosteum

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9
Q

what is the deepest part of area between tongue and teeth?

A

lingual sulcus

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10
Q

what is the mucosa in relation to the upper lip which is attached to alveolar bone?

A

upper labial alveolar mucosa

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11
Q

what is the mucosa in relation to the lower lip and attached to the alveolar bone?

A

lower labial alveolar mucosa

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12
Q

what is the boundries on both upper and lower for ‘labial’ mucosa before it changes to ‘buccal’ ?

A

between front 2 canine

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13
Q

what is the band of connective tissue found on the upper labial alveolar mucosa?

A

labial frenula

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14
Q

what is the junction between mucosa and gingiva called?

A

mucogingival junction

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15
Q

what is the difference between attached and free gingiva?

A

attached - attacthed to the alveolar bone

free - a tool is able to be passed under this

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16
Q

what is found within the free gingiva?

A

gingival sulcus - space between the teeth and the gingivae

free gingival groove - top part of the sulcus

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17
Q

what causes the mucosa of the mouth to appear red in colour?

A

they are non-keratinised and so blood can be see shining through

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18
Q

what causes the gingiva to appear pink?

A

Keratinisation of gingivae reduces transparency of mucosa so less redness from oxygenated blood shines through

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19
Q

what are the fringes of orange tissue that are of embryological development with no actual function?

A

fimbriated folds

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20
Q

which veins are bilateral on the inferior surface of the tongue which act as the main venous drainage?

A

deep lingual veins

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21
Q

what is the band of connective tissue that anchors the tongue to the floor of the mouth?

A

frenulum of tongue

22
Q

where are the openings for the ducts of the sublingual gland?

A

sublingual folds

23
Q

what benefit does the thin lining of the mucosa on the floor of the mouth have?

A

in administration if lipid soluble drugs they will pass into the underlying blood vessels

24
Q

what are the openings for the submandibular duct?

A

sublingual papillae

25
Q

what is the most inferior muscle of the floor of the mouth?

A

anterior belly of digastric

26
Q

what is the nerve supple of the anterior belly of digastric?

A

CN VII

27
Q

what muscle makes up the majority of the floor of the mouth?

A

mylohyoid - split into left and right which join at the mindline raphe

28
Q

what muscle contributes to the floor of the mouth and is found between the mylohyoid and the ABD?

A

genohyoid

29
Q

where does the genohyoid insert?

A

from the genial tubules to the hyoid bone

30
Q

what gland lies below the mylohyoid?

A

sublingual gland

31
Q

what is the relation between the submandibular duct and the lingual nerve?

A

the submandibular duct will always sit superior to the lingual nerve

32
Q

what are the functions of the tongue?

A
  • Formation of a food bolus
  • Pushing the food bolus to the posterior part of the oral cavity ready to be swallowed
  • Keeping the mouth clean
  • speech
  • tasting and sensing food
33
Q

what supplies general sensation ad taste to the posterior 1/3 of the tongue?

A

glossalpharyngeal - CN IX

34
Q

what foramen is related to the decent of the hyoid?

A

foramen caecum

35
Q

what is the border that separates the anterior and posterior tongue?

A

terminal sulcus

36
Q

what supplies taste to the anterior 2/3 of the tongue?

A

CN VII via chroda tympani

37
Q

what supplies general sensation to anterior tongue?

A

CN V3

38
Q

what papillae are pick up bitter taste?

A

vallate papillae

39
Q

what is the sesnosry supple of vallate papillae?

A

CN IX

40
Q

what do foliate papillae sense?

A

sour taste

41
Q

what is the sensory supply of foliate papillae?

A

CN VII

42
Q

what papillae pick up on sweet and salty tastes?

A

fungiform papillae

43
Q

what is the sensory supply to fungiform papillae?

A

CN VII

44
Q

what papillae sense touch?

A

filifrom papillae

45
Q

what is the sensory supply of filiform papillae

A

CN V3

46
Q

what is the route of the hypoglossal nerve to the tongue?

A
  1. Passes between the internal carotid artery and internal jugular vein lying on t
  2. After passing deep to the posterior belly of the digastric muscle, it passes to the submandibular region,
  3. Passes lateral to the hyoglossus muscle then deep to mylohyoid to reach the tongue.
47
Q

what is the motor supple to the tongue?

A

CN XII

48
Q

what is the difference between extrinsic and intrinsic muscles of the tongue?

A

intrinsic - originate & insert within the tongue

extrinsic - originate outwith the tongue and insert into it

49
Q

what are the 4 extrinsic muscles of the tongue?

A
  • genioglossus
  • styloglossus
  • hyoglossus
  • palatoglossus
50
Q

what is the innervation of the extrinsix muscles of the tongue?

A

CN XII EXCEPT palatoglossussupplied by CN X

51
Q

what is the clinical testing of CN XII?

A
  • Ask your patient to ‘stick their tongue straight out’
  • If both CN XIIs are normal, the tongue tip should stick out and remain in the
    MIDLINE

-If one CN XII is damaged, the tongue tip will
POINT TOWARDS
the side of the injured nerve

52
Q

what are the functions of the oral cavity?

A
  • preparation of food bolus for swallowing
    mastication (teeth and muscles of mastication)
    saliva
    the tongue
  • defence against ingestion of toxins/infection
    “tonsils” (lymphoid tissue)
    special sense of taste
  • speech
    “oral” and “nasal” sounds (the soft palate)
    articulation (making the sounds of speech) - tongue/lips

Anatomy (30 decks)

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