Tongue and oral cavity Flashcards

1
Q

What forms the roof of the oral cavity?

A

Hard and soft palates

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2
Q

What forms the floor of the oral cavity?

A

Mylohyoid mainly, hyoglosss, genioglossus, geniohyoid

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3
Q

What forms the lateral boundaries of the oral cavity?

A

Lips and cheeks

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4
Q

2 arches can be seen at the back of the oral cavity. 1 is larger and projects further into the midline, which is this?

A

Palatopharyngeal arch is larger

Palatoglossal arch is smaller

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5
Q

What is the sulcus terminals?

A

The boundary between the anterior 2/3 and posterior 1/3 of the tongue

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6
Q

What is the small fold of mucous membrane running from he floor of the mouth up the underside of the tongue

A

Frenulum

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7
Q

What vessel is very superficial on the underside fo the tongue?

A

Lingual vein

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8
Q

What artery and nerve can been seen on the underside fo the tongue?

A

Lingual artery and nerve

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9
Q

What innervates the anterior 2/3 of the tongue?

A
General sense = lingual nerve
Special sense (taste) = chorda tympani (VII)
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10
Q

What innervates the posterior 1/3 of the tongue?

A

Glossopharyngeal

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11
Q

What papillae line the sulcus terminals?

a) Circumvallate papillae
b) Filiform papillae
c) Fungiform papillae
d) Foliate papillae

A

a

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12
Q

What papillae are not he dorsal surface of the anterior 2/3 of the tongue?

a) Circumvallate papillae
b) Filiform papillae
c) Fungiform papillae
d) Foliate papillae

A

b

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13
Q

What papillae are the most anterior?

a) Circumvallate papillae
b) Filiform papillae
c) Fungiform papillae
d) Foliate papillae

A

c

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14
Q

What papillae are found in 2 clusters no the side of the tongue?

a) Circumvallate papillae
b) Filiform papillae
c) Fungiform papillae
d) Foliate papillae

A

d

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15
Q

What are papillae?

A

Projections of the tongue containing taste buds. Increase tongue SA so can taste and feel more accurately

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16
Q

What are the extrinsic muscles of tongue?

A

Styloglossus, hyoglossus, genioglossus, palatoglossus

17
Q

What innervates the extrinsic muscles of the tongue?

A
Hypoglossal nerve (XII)
except for palatoglossus which is innervated by pharyngeal plexus via X
18
Q

What is the function of hyoglossus?

A

Pulls sides of tongue down

19
Q

What is the function of styloglossus?

A

Pulls side of tongue up and back

20
Q

What is the function of genioglossus?

A

Pulls anterior tip forward

21
Q

What is the function of palatoglossus?

A

Lifts the tongue

22
Q

What are the intrinsic muscles of the tongue?

A

Superior longitudinal, inferior longitudinal, vertical, transverse

23
Q

What is the function of superior and inferior longitudinal?

A

Shorten the tongue

24
Q

What is the function of the vertical muscle?

A

Flatten the tongue

25
Q

What is the function of the transverse muscle?

A

Narrow the tongue

26
Q

What innervates the intrinsic muscles of?

A

XII

27
Q

What is the relationship of the lingual nerve to the submandibular duct?

A

Wraps around

28
Q

What nerve joins the lingual nerve?

A

Chorda tympani

29
Q

Where is the lingual nerve in relation to mylohyoid and hyoglossus?

A

Deep to mylohyoid, superficial to hyoglossus

30
Q

What does lingual nerve provide parasympathetic innervation to?

A

Submandibular ganglion

31
Q

Where does the lingual nerve go?

A

To the tongue to provide general sensory innervation to the anterior 2/3

32
Q

What artery wraps around XII?

A

Lingual artery

33
Q

Where do the branches fo XII head?

A

Muscles of the tongue

34
Q

What muscle is XII deep to?

A

Posterior digastric

35
Q

What nerves innervate the tooth substance of the mandibular teeth?

A

Inferior alveolar nerve = posterior 5

Mental = anterior 3

36
Q

What nerves innervate the mandibular gingiva?

A

Long buccal nerve = posterior buccal
Mental = anterior buccal
Lingual nerve = lingual gingiva

37
Q

What nerves innervate the tooth substance of the maxillary teeth?

A

Posterior 3 = posterior superior alveolar nerve
Middle 2 = middles superior alveolar nerve
Anterior 3 = anterior superior alveolar nerve

38
Q

What nerves innervate the maxillary gingiva?

A

Posterior superior alveolar nerve = posterior buccal
Infraorbital nerve = anterior buccal
Greater palatine = posterior lingual
Nasopalatine = anterior lingual