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BDS3 Head & Neck Anatomy > Oral Cavity > Flashcards

Oral Cavity Flashcards

1
Q

roof of oral cavity

A

hard & soft palates

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2
Q

floor of oral cavity

A

mainly soft tissues, including tongue

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3
Q

lateral walls of oral cavity

A

cheeks

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4
Q

how dental arches separate the oral cavity

A

separate it into oral vestibule and oral cavity proper

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5
Q

anteriorly, the oral fissure is created by

A

the lips

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6
Q

posteriorly to the dental arches is

A

the oropharynx which is accessed through the oropharyngeal isthmus

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7
Q

what is the oral vestibule

A

slit-like space between teeth and gingiva, and the lips and cheeks. it communicates with the exterior through the oral fissure

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8
Q

what is the oral cavity proper

A

space between upper and lower dental arches which also limit it laterally and anteriorly

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9
Q

what is the philtrum

A

a depression in the midline above the upper lip and is a vestigial feature

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10
Q

main muscle of lips

A

orbicularis oris muscle which acts as a sphincter for the oral fissure

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11
Q

blood supply of lips

A

superior and inferior labial arteries (branches of facial artery) anastomose with each other in lips to form an arterial ring

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12
Q

sensory innervation to the lips overall is via

A

CN V

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13
Q

sensory innervation of upper lip

A

CN V2 via superior labial branches of infraorbital nerves

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14
Q

sensory innervation of lower lip

A

CN V3 via inferior labial branches of mental nerve

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15
Q

lymphatic drainage of the lips is via

A

submandibular lymph nodes except medial part of lower lip which initially goes to submental nodes

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16
Q

main muscular component of cheeks

A

buccinator

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17
Q

blood supply of cheeks

A

via buccal branches of maxillary artery

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18
Q

sensory innervation of cheeks

A

buccal branches of mandibular nerve

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19
Q

motor innervation of cheeks

A

as with all muscles of facial expression, innervation is via the facial nerve

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20
Q

what is the labial frenulum

A

mucosal fold that connects the gingiva to the lips in the midline

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21
Q

what is the buccal frenulum

A

mucosal fold that is observed laterally

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22
Q

what forms the floor of the mouth

A

paired mylohyoid muscles

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23
Q

where do mylohyoid muscles connect

A

in the midline to the mylohyoid raphe

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24
Q

where is the geniohyoid in relation to mylohyoid

A

sit superior to the mylohyoid

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25
Q

attachments of geniohyoid

A

from inferior mental spine of mandible to the body of the hyoid

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26
Q

posterior 1/3 of tongue forms

A

anterior wall of oropharynx

27
Q

what separates anterior and posterior parts of tongue

A

terminal sulcus

28
Q

4 types of papillae on tongue

A

fungiform
foliate
vallate
filiform

29
Q

fungiform papillae

A

mushroom shaped

30
Q

foliate papillae

A

folds of mucosa lining posteriorly and laterally on superior surface

31
Q

vallate papillae

A

largest papillae, arranged in a V shape anterior to terminal sulcus

32
Q

filiform papillae

A

only papillae that have no taste buds

33
Q

what is in posterior part of tongue instead of lingual papillae

A

lymphoid nodules collectively known as lingual tonsil

34
Q

inferior surface of tongue midline is marked by

A

frenulum

35
Q

2 types of muscle of tongue

A

intrinsic and extrinsic

36
Q

muscles of the tongue are

A

paired and separated by a sagittal septum

37
Q

function of intrinsic muscles

A

change size and shape of tongue

38
Q

name the 4 intrinsic muscles of tongue

A
  1. superior longitudinal
  2. vertical
  3. transverse
  4. inferior longitudinal
39
Q

function of extrinsic muscles of tongue

A

protruding, retracting, elevating and depressing tongue

40
Q

name the 4 extrinsic muscles of tongue

A
  1. palatoglossus
  2. styloglossus
  3. hyoglossus
  4. genioglossus
41
Q

genioglossus location

A

superior to geniohyoid muscle

42
Q

genioglossus origin

A

superior mental spines of mandible

43
Q

genioglossus insertion

A

inferior fibres attach to hyoid bone
superior fibres blend with intrinsic muscles of tongue

44
Q

genioglossus function

A

protruding tongue

45
Q

hyoglossus location

A

lateral to genioglossus

46
Q

origin of hyoglossus

A

greater horn of hyoid

47
Q

insertion of hyoglossus

A

intrinsic muscles on lateral aspects of tongue

48
Q

function of hyoglossus

A

depressing sides of the tongue

49
Q

what major arterial supply to tongue enters tongue between hyoglossus and genioglossus muscles

A

lingual artery

50
Q

styloglossus origin

A

styloid process of temporal bone

51
Q

insertion of styloglossus

A

fibres blend with intrinsic muscles of tongue and superior fibres of the hyoglossus

52
Q

styloglossus function

A

elevation and retraction of tongue

53
Q

palatoglossus origin

A

palatine aponeurosis

54
Q

insertion of palatoglossus

A

fibres blend with intrinsic muscles on lateral surface of tongue

55
Q

motor innervation of tongue is via

A

hypoglossal nerve & vagus nerve

56
Q

hypoglossal nerve supplies which muscles of the tongue

A

genioglossus
hyoglossus
styloglossus

57
Q

vagus nerve supplies which muscles of the tongue

A

palatoglossus

58
Q

general sensation is

A

pressure, pain, temperature

59
Q

general sensation of tongue supplied by

A

mandibular nerve CN V3 - anterior 2/3
glossopharyngeal nerve - posterior 1/3

60
Q

special sensation is

A

taste

61
Q

special sensation of tongue supplied by

A

facial nerve via chorda tympani - anterior 2/3
glossopharyngeal nerve - posterior 1/3

62
Q

arterial supply of tongue

A

lingual artery which is a branch of ECA

63
Q

venous drainage of tongue

A

deep lingual and dorsal lingual veins which drain to IJV

BDS3 Head & Neck Anatomy (25 decks)

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