Oral Cavity

Question 1

roof of oral cavity

Answer 1

hard & soft palates

Question 2

floor of oral cavity

Answer 2

mainly soft tissues, including tongue

Question 3

lateral walls of oral cavity

Answer 3

cheeks

Question 4

how dental arches separate the oral cavity

Answer 4

separate it into oral vestibule and oral cavity proper

Question 5

anteriorly, the oral fissure is created by

Answer 5

the lips

Question 6

posteriorly to the dental arches is

Answer 6

the oropharynx which is accessed through the oropharyngeal isthmus

Question 7

what is the oral vestibule

Answer 7

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

Question 8

what is the oral cavity proper

Answer 8

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

Question 9

what is the philtrum

Answer 9

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

Question 10

main muscle of lips

Answer 10

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

Question 11

blood supply of lips

Answer 11

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

Question 12

sensory innervation to the lips overall is via

Answer 12

CN V

Question 13

sensory innervation of upper lip

Answer 13

CN V2 via superior labial branches of infraorbital nerves

Question 14

sensory innervation of lower lip

Answer 14

CN V3 via inferior labial branches of mental nerve

Question 15

lymphatic drainage of the lips is via

Answer 15

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

Question 16

main muscular component of cheeks

Answer 16

buccinator

Question 17

blood supply of cheeks

Answer 17

via buccal branches of maxillary artery

Question 18

sensory innervation of cheeks

Answer 18

buccal branches of mandibular nerve

Question 19

motor innervation of cheeks

Answer 19

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

Question 20

what is the labial frenulum

Answer 20

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

Question 21

what is the buccal frenulum

Answer 21

mucosal fold that is observed laterally

Question 22

what forms the floor of the mouth

Answer 22

paired mylohyoid muscles

Question 23

where do mylohyoid muscles connect

Answer 23

in the midline to the mylohyoid raphe

Question 24

where is the geniohyoid in relation to mylohyoid

Answer 24

sit superior to the mylohyoid

Question 25

attachments of geniohyoid

Answer 25

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

Question 26

posterior 1/3 of tongue forms

Answer 26

anterior wall of oropharynx

Question 27

what separates anterior and posterior parts of tongue

Answer 27

terminal sulcus

Question 28

4 types of papillae on tongue

Answer 28

fungiform foliate vallate filiform

Question 29

fungiform papillae

Answer 29

mushroom shaped

Question 30

foliate papillae

Answer 30

folds of mucosa lining posteriorly and laterally on superior surface

Question 31

vallate papillae

Answer 31

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

Question 32

filiform papillae

Answer 32

only papillae that have no taste buds

Question 33

what is in posterior part of tongue instead of lingual papillae

Answer 33

lymphoid nodules collectively known as lingual tonsil

Question 34

inferior surface of tongue midline is marked by

Answer 34

frenulum

Question 35

2 types of muscle of tongue

Answer 35

intrinsic and extrinsic

Question 36

muscles of the tongue are

Answer 36

paired and separated by a sagittal septum

Question 37

function of intrinsic muscles

Answer 37

change size and shape of tongue

Question 38

name the 4 intrinsic muscles of tongue

Answer 38

1. superior longitudinal 2. vertical 3. transverse 4. inferior longitudinal

Question 39

function of extrinsic muscles of tongue

Answer 39

protruding, retracting, elevating and depressing tongue

Question 40

name the 4 extrinsic muscles of tongue

Answer 40

1. palatoglossus 2. styloglossus 3. hyoglossus 4. genioglossus

Question 41

genioglossus location

Answer 41

superior to geniohyoid muscle

Question 42

genioglossus origin

Answer 42

superior mental spines of mandible

Question 43

genioglossus insertion

Answer 43

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

Question 44

genioglossus function

Answer 44

protruding tongue

Question 45

hyoglossus location

Answer 45

lateral to genioglossus

Question 46

origin of hyoglossus

Answer 46

greater horn of hyoid

Question 47

insertion of hyoglossus

Answer 47

intrinsic muscles on lateral aspects of tongue

Question 48

function of hyoglossus

Answer 48

depressing sides of the tongue

Question 49

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

Answer 49

lingual artery

Question 50

styloglossus origin

Answer 50

styloid process of temporal bone

Question 51

insertion of styloglossus

Answer 51

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

Question 52

styloglossus function

Answer 52

elevation and retraction of tongue

Question 53

palatoglossus origin

Answer 53

palatine aponeurosis

Question 54

insertion of palatoglossus

Answer 54

fibres blend with intrinsic muscles on lateral surface of tongue

Question 55

motor innervation of tongue is via

Answer 55

hypoglossal nerve & vagus nerve

Question 56

hypoglossal nerve supplies which muscles of the tongue

Answer 56

genioglossus hyoglossus styloglossus

Question 57

vagus nerve supplies which muscles of the tongue

Answer 57

palatoglossus

Question 58

general sensation is

Answer 58

pressure, pain, temperature

Question 59

general sensation of tongue supplied by

Answer 59

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

Question 60

special sensation is

Answer 60

taste

Question 61

special sensation of tongue supplied by

Answer 61

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

Question 62

arterial supply of tongue

Answer 62

lingual artery which is a branch of ECA

Question 63

venous drainage of tongue

Answer 63

deep lingual and dorsal lingual veins which drain to IJV