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Head and neck radiology > Oral Cavity > Flashcards

Oral Cavity Flashcards

1
Q

Oral cavity is separated from oropharynx by

A

Soft palate, anterior tonsillar pillars and circumvallate papillae

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2
Q

Non-fascial liner area in the oral cavity that is superomedial to mylohyoid muscle

A

Sublingual space

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3
Q

Located inferolateral to mylohyoid muscle

A

Submandibular space

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4
Q

The root of tongue is made up of

A

Genioglosssus-geniohyoid complex and lingual septum

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5
Q

Superior border of oral cavity

A

Hard palate, maxillary alveolar ridge

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6
Q

Lateral border of oral cavity

A

Cheek-buccal space

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7
Q

Inferior border of oral cavity

A

Mylohyoid muscle, mandibular alveolar ridge and teeth

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8
Q

Posterior border of oral cavity

A

Soft palate, anterior tonsillar pillars and lingual tonsil

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9
Q

Sublingual space is between __________ inferolaterally and __________ medially

A

Mylohyoid and genioglossus

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10
Q

Anteriorly, sublingual space communicate beneath

A

Frenulum

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11
Q

Posteriorly, sublingual space communicates with

A

posterosuperior aspect of submandibular space and inferior parapharyngeal space

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12
Q

Forms the “horizontal horseshoe” in deep oral tongue

A

Frenulum

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13
Q

“Vertical horseshoe” space between hyoid bone below and mylohyoid muscle sling above

A

Submandibular space

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14
Q

Submandibular space communicates posteriorly with

A

Inferior parapharyngeal space and posterior sublingual space

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15
Q

Submandibular space continues inferiorly as

A

Anterior cervical space

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16
Q

Inferiorly root of tongue ends at

A

Mylohyoid sling

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17
Q

Anteriorly, root of tongue ends at

A

Mandibular symphysis

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18
Q

Large, fan-shaped muscle arising anteriorly from superior mental spine on inner surface of symphysis menti of mandible; inserts along entire length of under surface of tongue

A

Genioglossus

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19
Q

Thin and quadrilateral shaped arising from body and greater cornu of hyoid bone; passes vertically upward to insert into side of tongue

A

Hyoglossus

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20
Q

Forms floor of mouth

A

Mylohyoid muscle

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21
Q

Small triangular shaped region of mucosa behind last molar on mandibular ramus

A

Retromolar trigone

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22
Q

Anatomical crossroads of oral cavity, oropharynx, soft palate, buccal space, floor of mouth, masticator space and PPS

A

Retromolar trigone

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23
Q

Fibrous band extending from posterior mandibular mylohyoid line to medial pterygoid plate hamulus
Perifascial route of spread for SCCa

A

Pterygomandibular raphe

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24
Q

Fascia of sublingual space

A

Not lined by fascia

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25
Q

Submandibular space is lined by

A

Superficial layer of DCF

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26
Q

Anterior extent of oral mucosal space

A

Skin-vermillion junction of upper and lower lips

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27
Q

Posterosuperior extent of oral mucosal space

A

Junction of hard and soft palate

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28
Q

Posteroinferior extent of oral mucosal space

A

Junction of tongue at circumvallate papillae

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29
Q

Refers to mucosa overlying alveolar process of maxilla

A

Upper alveolar ridge

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30
Q

Mucosa overlying alveolar process of mandible

A

Lower alveolar ridge

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31
Q

Key neurovascular structures of oral cavity

A

CN9, CN12
Lingual nerve (branch of V3)
Lingual artery and vein

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32
Q

Posterior aspect of sublingual space is divided into medial and lateral compartments by

A

Hypoglossal muscle

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33
Q

Motor to intrinsic and extrinsic muscles of tongue

A

Hypoglossal nerve

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34
Q

Intrinsic muscles of tongue

A

Inferior lingual, vertical and transverse muscles

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35
Q

Extrinsic muscles of tongue

A

Genioglossus, hyoglossus, styloglossus and palatoglossus

36
Q

Sensation to anterior 2/3 of oral tongue

A

Lingual nerve branch of V3

37
Q

Anterior 2/3 of tongue taste and parasympathetic secreto-motor fibers to submandibular ganglion/ gland

A

Chorda tympani

38
Q

Lateral compartment contents of sublingual space

A

Hypoglossal nerve
Lingual nerve
Sublingual glands and ducts
Submandibular gland deep portion and submandibular duct

39
Q

Medial compartment contents

A

Glossopharymgeal nerve

Lingual artery and vein

40
Q

Provides sensation to posterior 1/3 of tongue

A

Glossopharyngeal nerve

41
Q

Submandibular gland innervation

A

Parasympathetic secretomotor supply from chorda tympani (CN7)

42
Q

Submandibular space fascia

A

Superficial layer DCF

43
Q

Oral tongue is the

A

Anterior 2/3 not including tongue base

Freely mobile portion

44
Q

Root of tongue

A

Lingual septum, inferior portion of genioglossus muscles and geniohyoid muscles

45
Q

Crescent-shaped region of mucosa overlying mylohyoid and hyoglossus muscles, extending from inner aspect of lower alveolar ridge to undersurface of anterior oral tongue

A

Floor of mouth

46
Q

Base of tongue is the

A

Posterior 1/3 of tongue in oropharynx

47
Q

Muscles of tongue that move tongue body and alters its shape

A

Extrinsic tongue muscles

48
Q

Extrinsic tongue muscles supplied by CN12

A

Genioglossus, hyoglossus, styloglossus

49
Q

Extrinsic tongue muscle innervated by CN10

A

Palatoglossus

50
Q

Tongue muscles that alters shape of tongue during deglutition and speech

A

Intrinsic tongue muscles

51
Q

Triangle-shaped area of mucosa posterior to last mandibular molar that covers anterior surface of lower ascending ramus of mandible

A

Retromolar trigone

52
Q

Thick fascial band that extends between posterior border of mandibular mylohyoid ridge and hamulus of medial pterygoid plate

A

Pterygomandibular raphe

53
Q

Retromandibular trigone cephalad tip

A

Level of base of pterygoid plate

54
Q

Fascial band of pterygomandibular raphe extends from

A

Posterior border of mylohyoid ridge of mandible to hamulus of medial pterygoid plate

55
Q

Posterior margin of pterygomandibular raphe

A

Buccinator muscle

56
Q

Anterior margin of pterygomandibular raphe

A

Superior constrictor muscle

57
Q

Contains articular surface of TMJ

A

Condylar head and neck of mandible

58
Q

Where temporalis muscle inserts

A

Coronoid process of mandible

59
Q

What separates the 2 coronoid process of mandible

A

Mandibular notch

60
Q

Divides the masticator space into lateral and medial compartments

A

Mandibular ramus

61
Q

Transmits the inferior alveolar nerve

A

Mandibular foramen

62
Q

Small, osseous lip extending from anterior aspect of mandibular foramen

A

Lingula

63
Q

Mandibular body is fused in anterior midline at

A

Symphysis menti

64
Q

Alveolar process consists of

A

External buccal and internal lingual plates

65
Q

Paired external openings of mandibular canal that transmits mental nerve

A

Mental foramen

66
Q

Bony ridge on lingual mandible body which is site of attachment of mylohyoid muscle

A

Mylohyoid ridge

67
Q

Contains inferior alveolar nerve and vessels

A

Mandibular canal

68
Q

Innervates ipsilateral premilars and molars

A

Inferior alveolar nerve

69
Q

Provides sensory innervation to skin and mucosa of lower lip and labial gingiva

A

Mental nerve

70
Q

Innervates ipsilateral canine and incisors

A

Incisive nerve

71
Q

Represents inferior aspect of maxillary bone

A

Maxillary alveolar ridge

72
Q

Anterior hard palate and alveolar ridge that contains incisive foramen (nasopalatine nerve)

A

Premaxilla

73
Q

Forms anterior 2/3 of hard palate

A

Palatine process of maxillary bone

74
Q

Forms posterior 1/3 hard palate

A

Horizontal plate of palatine bone

75
Q

Supplies sensory fibers to anterior hard palate

A

Nasopalatine nerve

76
Q

Comes down greater palatine canal in palatine bone.

Supplies sensation to posterior 2/3 of hard palate

A

Greater palatine nerve

77
Q

Supplies sensiry fibers to palatine tonsil

A

Lesser palatine nerve

78
Q

Densest material in body of tooth

A

Enamel

79
Q

Encases pulp of tooth

A

Dentin

80
Q

Nourishes the dentin

A

Pulp

81
Q

Acts as a medium for attachung fibers of periodontal ligament to tooth

A

Cementum

82
Q

Radiolucency surrounding tooth root

A

Periodontal space

83
Q

If malignancy affects skin of upper lip, hard palate, soft palate check for

A

V2 perineural tumor

84
Q

Major locations to identify V2 perineural tumor extend from

A

Incisive canal-greater palatine foramen to root entry zone of V in lateral pons

85
Q

If malignant tumor of skin of chin, mandibular alveolar ridge or masticator space, check for

A

V3 perineural tumor

86
Q

In checking for V3 perineural tumor, pay special attention to

A

Inferior alveolar canal, mandibular foramen, masticator space

Head and neck radiology (15 decks)

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