Oral Cavity 1 Flashcards

1
Q

What are the boundaries of the oral cavity?

A

Extends from the lips to the oropharyngeal isthmus

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2
Q

What is the oropharyngeal isthmus?

A

Is the junction of mouth and pharynx

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3
Q
A
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4
Q
A
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5
Q

What is the oral cavity divided into?

A

Vestibule and oral cavity proper

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6
Q

What is the vestibule?

A

Slit like space between the cheeks and the gums

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7
Q

What is the oral cavity proper?

A

Everything

Not cheeks and teeth

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8
Q
A
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9
Q

Where does the vestibule communicate with the oral cavity proper?

A

The cavity behind the third molar on each side

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10
Q

What muscle forms the lateral wall of vestibule?

A

Buccinator muscle

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11
Q

What covers the cheek (buccinator muscle medically and laterally?

A

Laterally = skin

Medially = mucous membrane

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12
Q

What is the small papilla?

A

mark the opening of ducts and bumps/taste buds on tongue

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13
Q

Where are the small papilla found in the vestibule?

A

Upper second molar tooth

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14
Q

What do the papilla near the upper second molar tooth mark?

A

Duct of the parotid gland

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15
Q

What alveolar margins are the oral cavity proper within?

A

The maxillae and the mandible

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16
Q

What forms the roof of the oral cavity proper?

A

Formed by the hard palate anteriorly and the soft palate posteriorly

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17
Q

What forms the floor of the oral cavity proper?

A

Mylohyoid muscle

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18
Q

What part of the tongue lies on the floor of the oral cavity proper?

A

Anterior 2/3

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19
Q
A
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20
Q
A
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21
Q

What is the floor of the mouth covered in?

A

Mucous membrane

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22
Q

What does the frenulum connect?

A

The tongue to the floor of the mouth

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23
Q

What is found at each side of the frenulum?

A

A small papilla has the opening of the duct of the submandibular gland

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24
Q

What does the sublingual gland drain into?

A

Submandibular lymph nodes

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25
Q
A
26
Q

What nerves supply the roof of the oral cavity?

A

Greater palatine and nasopalatine nerves - branches of maxillary nerve

27
Q

What are the greater palatine and nasopalatine nerves branches of?

A

The maxillary nerve

28
Q

What nerve supplies the floor of the oral cavity?

A

Lingual nerve (branches of mandibular nerve)

29
Q

what nerve supply the cheek of the oral cavity?

A

Buccal nerve (branch of mandibular)

30
Q

what are the buccal and lingual nerves branches of?

A

Mandibular nerve

31
Q

What type of innervate on are the greater palatine, nasopalatine, lingual and buccal nerves?

A

Sensory innervate on

32
Q

What gives motor innervation to the buccinator and orbicularis oris muscles?

A

Branches of the facial nerve

33
Q

Describe the tongue

A

Mass fo striated muscles covered with muscles membrane

34
Q

What separates the left and right halves of the tongue?

A

Median septum

35
Q

Name the 3 parts of the tongue

A

Oral (anterior 2/3)
Pharyngeal (posterior 1/3)
Root

36
Q

What are the dorsal and ventral parts of the tongue?

A

Dorsal = bigger upper surface
Ventral = under the tongue

37
Q

What differentiates the anterior 2/3 and posterior 1/3 of tongue?

A

V -shaped sulcus terminalis

38
Q

what marks the apex of the sulcus terminalis?

A

Foremen cecum

39
Q
A
40
Q

What does the foremen cecum mark?

A

Upper end of the thyroglossal duct

41
Q

What are the 3 types of papillae in the anterior 2/3 of the tongue?

A

Filliform
Fungiform
Vallate

42
Q

Does the posterior 1/3 of tongue have papillae?

A

No

43
Q

What does the posterior 1/3 of tongue show?

A

Modular surface because of underlying lymphatic nodules, the lingual tonsils

44
Q
A
45
Q

What vein is found laterally to the frenulum?

A

deep lingual vein

46
Q

What drug is absorbed under the tongue?

A

Nitroglycerin

47
Q

What is nitroglycerin used for?

A

Vasodilator

In angina pectoris

48
Q

What blood vessel does nitroglycerin enter?

A

The deep lingual veins

49
Q

What lies laterally to the lingual vein?

A

A fold of mucosa forms the plica fimbriata

50
Q

what 2 types of muscle make the tongue?

A

Intrinsic and extrinsic

51
Q

What are the intrinsic muscles of teh tongue?

A

Longitudinal fibres
Transverse fibres
Vertical fibres

Confined to tongue

52
Q

What is the function of the intrinsic muscles of the tongue?

A

alter tongue shape

53
Q

What is the function of the extrinsic muscles of the tongue?

A

Help movements of the tongue

54
Q

What are the extrinsic muscles of the tongue?

A

Palatoglossus
Genioglossus
Hyoglossus
Styloglossus

55
Q

What structures do the extrinsic muscles connect the tongue to?

A

To surrounding structures

The soft palate and the bones (mandible, hyoid bone, style I’d process)

56
Q

What is the movement of the genioglossus?

A

Protrusion

57
Q

What is the movement of the styloglossus?

A

Retraction an elevation

58
Q

What is the movement of the hyoglossus?

A

Retraction and depression

59
Q

What is the movement of the palatoglossus?

A

elevation

60
Q

What muscles allow retraction of tongue?

A

Styloglossus and hyoglossus

61
Q

What muscles allow depression of the tongue?

A

Hyoglossus and genioglossus

62
Q

What muscles of teh tongue allow elevation?

A

Styloglossus and palatoglossus