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MD2S3: Anatomy 203 > Oral Cavity > Flashcards

Oral Cavity Flashcards

1
Q

What are the parts of the mouth cavity?

A

Mouth Cavity Proper: Space between Upper and Lower Alveolar Arches
Vestibule: Space between teeth and gums on one side and lips and cheeks on the other

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2
Q

Oral Cavity is lined with …

A

stratified squamous epithelium

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3
Q

Gingiva, Hard Palate and Dorsum of Tongue are …

A

slightly keratinized

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4
Q

Boundaries of Oral Cavity

A

Anterior: Lips
Posterior: Continuous with Oropharynx
Lateral: Cheeks
Superior: Palate
Inferior: Tongue

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5
Q

What are the components of the Oral Cavity?

A

Lips
Cheeks
Teeth
Palate
Tongue

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6
Q

Lips
Formed from?

A

Orbicularis Oris

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7
Q

Lips
What covers the lips externally?

A

Skin

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8
Q

Lips
What covers the lips internally?

A

Mucous Membrane

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9
Q

Lips
What connects the Lips to the Gums?

A

Midline structure called Labial Frenula

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10
Q

Cheeks
Which muscle forms the cheeks?

A

Buccinator

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11
Q

Cheeks
Function of Buccinator Muscle in Cheeks?

A

Prevents accumulation of food in Vestibule

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12
Q

Cheeks
What separates Cheeks from Lips?

A

Nasolabial Folds

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13
Q

Teeth
Teeth changes by age

A

Deciduous Teeth: 6 months - 2 years
Permanent Teeth: 6 - 12 years
Wisdom Teeth (3rd Molar): 17 - 25 years

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14
Q

Teeth
Number of Teeth

A

4 Incisors
2 Canines
4 molars (3rd molar develops later)

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15
Q

Teeth
Bones forming Jaw

A

Upper Jaw: Maxillary Bone
Lower Jaw: Mandible

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16
Q

Palate
Parts of the Palate

A

Hard Palate (anterior)
Soft Palate (posterior)

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17
Q

Palate
Components of Hard Palate?

A

Maxilla
Palatine Bone

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18
Q

Palate
Posterior Part of Soft Palate is the …

A

uvula

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19
Q

Palate
Muscles of Soft Palate?

A

Tensor Palati
Levator Palati
Musculus Uvulae
Palatoglossus

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20
Q

Palate
Tensor Palati: Origin

A

Eustachian Tube and Scaphoid Fossa

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21
Q

Palate
Tensor Palati: Insertion

A

Tendons fuse forming Palatine Aponeurosis which inserts into Margin of Palatine Bone

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22
Q

Palate
Tensor Palati: Action

A

Tenses the Palate

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23
Q

Palate
Levator Palati: Origin

A

Eustachian Tube and Petrous Bone

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24
Q

Palate
Levator Palati: Insertion

A

Palatine Aponeurosis

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25
Q

Palate
Levator Palati: Action

A

Elevate Tensed Palate to shut the Nasopharynx from Oropharynx

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26
Q

Palate
Musculus Uvulae: Origin

A

Palatine Aponeurosis

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27
Q

Palate
Musculus Uvulae: Insertion

A

Mucosa of Uvula

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28
Q

Palate
Musculus Uvulae: Action

A

Tenses Uvula

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29
Q

Palate
Palatoglossus: Origin

A

Palatine Aponeurosis

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30
Q

Palate
Palatoglossus: Insertion

A

Side of Tongue

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31
Q

Palate
Palatoglossus: Action

A

Raises Tongue

32
Q

Palate
Sensory Nerve Supply

A

Hard Palate: Greater Palatine and Nasopalatine Nerves
Soft Palate: Lesser Palatine Nerve

33
Q

Palate
Motor Nerve Supply

A

Cranial Accessory Nerve
Only Tensor Palati supplied by Medial Pterygoid (from Trigeminal Nerve)

34
Q

Tongue
Functions

A

Taste
Mastication
Speech
Deglutition

35
Q

Tongue
What structure connects the tongue to the floor of the mouth?

A

Connected in the midline by Frenulum

36
Q

Tongue
Structures lateral to Frenulum

A

Immediately Lateral: Submandibular Ducts opening into Sublingual Papillae
Further Lateral: Sublingual Salivary Glands

37
Q

Tongue
Divisions of Tongue

A

Anterior 2/3 = Oral Part
Posterior 1/3 = Pharyngeal Part
Divided by Terminal Sulcus

38
Q

Tongue
What is the Foramen Caecum?

A

Depression at site of Thyroid Rudiment

39
Q

Tongue
Components of each part of the tongue

A

Oral Part: Vallate, Fungiform, Filiform and Foliate Papillae
Pharyngeal Part: Lingual Tonsil

40
Q

Tongue
Pillars of each side of the Tongue

A

Palatoglossal Arch: Connects Palate to Tongue
Palatopharyngeal Arch: Connects Palate to Pharynx

41
Q

Tongue
Location of Tonsils

A

Between the arches on either side of the Tongue

42
Q

Tongue
How is the Tongue connected to the Epiglottis?

A

Median Epiglottic Fold
Pair of Lateral Epiglottic Folds

43
Q

Tongue
What is the Valecula?

A

Depression on either side of Median Epiglotic Fold

44
Q

Tongue
Types of Tongue Muscles

A

Extrinsic: Alter Position of Tongue
Intrinsic: Alter Shape of Tongue

45
Q

Tongue
What are the four pairs of Extrinsic Muscles?

A

Genioglossus
Hyoglossus
Styloglossus
Palatoglossus

46
Q

Tongue: Extrinsic Muscles
Genioglossus: Origin

A

Genial Tubercles of Mandible

47
Q

Tongue: Extrinsic Muscles
Genioglossus: Insertion

A

Superior Surface of Tongue

48
Q

Tongue: Extrinsic Muscles
Genioglossus: Action

A

Bring Tongue forward

49
Q

Tongue: Extrinsic Muscles
Styloglossus: Origin

A

Styloid Process of Skull

50
Q

Tongue: Extrinsic Muscles
Styloglossus: Insertion

A

Inferior Surface of Tongue

51
Q

Tongue: Extrinsic Muscles
Styloglossus: Action

A

Pull Tongue Backward

52
Q

Tongue: Extrinsic Muscles
Palatoglossus: Action

A

Elevates Root of Tongue shutting oral Cavity from Oropharynx

53
Q

Tongue: Extrinsic Muscles
Hyoglossus: Origin

A

Hyoid Bone

54
Q

Tongue: Extrinsic Muscles
Hyoglossus: Insertion

A

Side of Posterior 1/2 of Tongue

55
Q

Tongue: Extrinsic Muscles
Hyoglossus: Action

A

Pull Tongue Downward and Backward

56
Q

Tongue
What are the Intrinsic Muscles?

A

Superior Longitudinal Muscle
Inferior Longitudinal Muscle: Shortens Tongue
Transverse Muscle: Narrows and Elongates Tongue
Vertical Muscle: Flattens and Broadens Tongue

57
Q

Tongue
Sensory Nerve Supply

A

Anterior 2/3: Taste by Chorda Tympani of Facial Nerve + Touch and Temperature by Lingual Branch of Trigeminal
Posterior 1/3: Taste, Touch and Temperature by Glossopharyngeal Nerve
Vallecula: Vagus Nerve

58
Q

Tongue
Motor Nerve Supply

A

Hypoglossal Nerve
Only Palatoglossus supplied by Cranial Accessory Nerve

59
Q

Muscles of Mastication

A

Lateral Pterygoid
Medial Pterygoid
Temporalis
Masseter Muscle

60
Q

Lateral Pterygoid
Origin

A

Upper Head: Greater Wing of Sphenoid
Lower Head: Lateral Pterygoid Plate

61
Q

Lateral Pterygoid
Insertion

A

Pterygoid Fovea
Capsule and Articular Disc of Temporomandibular Joint

62
Q

Lateral Pterygoid
Nerve Supply

A

Nerve to Lateral Pterygoid (branch from anterior division of Mandibular Nerve)

63
Q

Lateral Pterygoid
Action

A

Protrusion of Mandible
Chewing with Medial Pterygoid

64
Q

Medial Pterygoid
Origin

A

Deep Head: Lateral Pterygoid Plate
Superificial Head: Tuberosity of Maxilla

65
Q

Medial Pterygoid
Insertion

A

Medial Surface of Ramus and Angle of Mandible

66
Q

Medial Pterygoid
Nerve Supply

A

Nerve to Medial Pterygoid (branch from Trunk of Mandibular Nerve)

67
Q

Medial Pterygoid
Action

A

Elevation of Mandible
Chewing movements of Mandible

68
Q

Temporalis
Origin

A

Floor of Temporal Fossa

69
Q

Temporalis
Insertion

A

Coronoid Process of Mandible

70
Q

Temporalis
Nerve Supply

A

Temporal Nerves

71
Q

Temporalis
Action

A

Vertical Fibers: Elevates Mandible
Horizontal Fibers: Retracts Mandible

72
Q

Masseter Muscle
Origin

A

Inferior Border of Zygomatic Arch

73
Q

Masseter Muscle
Insertion

A

Lateral Surface of Ramus of Mandible

74
Q

Masseter Muscle
Nerve Supply

A

Masseteric Nerve

75
Q

Masseter Muscle
Action

A

Elevation of Mandible

MD2S3: Anatomy 203 (31 decks)

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