oral cavity

Question 1

the oral cavity includes

Answer 1

mouth, teeth, gums, tongue, palate, and region of palatine tonsils

Question 2

2 parts of the oral cavity

Answer 2

-oral vestibule: space between the teeth and lips
-oral cavity proper: space behind the teeth

Question 3

orbicularis oris

Answer 3

controls the oral fissure, size, and shape of the mout

Question 4

boundaries of oral cavity proper

Answer 4

-laterally and anteriorly: upper and lower arcades
roof: palate
floor: muscle
posterior: communicate with the orpharynx

Question 5

palate

Answer 5

arched roof the oral cavity proper and floor of the nasal cavitie

Question 6

hard palate

Answer 6

formed by parts of the maxillae and palatine bones, covered by a mucous membrane, filled with the tongue at rest. mucous provides immune function and has general sensory to pain

Question 7

soft palate

Answer 7

moveable 1/3 of the palate
-extends posteroinferiorly with the uvula

Question 8

lateral soft palate

Answer 8

muscles move down, maintain open airway

Question 9

palatoglossal arch
palatopharyngeal arch

Answer 9

-joins palate and tongue
-join palate and pharynx

Question 10

muscles of the soft palate
origin
insert
contract
function

Answer 10

origin: base of the skull and descend
insert: palate, pharynx, larynx
contract: pull on the skull base, move the pharynx, larynx or palate function: chew, swallow, open airway. can be elevated or pulled down inferiorly

Question 11

muscular floor of oral cavity:

Answer 11

1. genioglossus: tongue
2. geniohyoid: mandible
3. mylohyoid: deepest

Question 12

tongue

Answer 12

-combination of intrinsic and extrinsic muscles
-function: assists in mastication, taste, swallowing, speech and oral cavity

Question 13

extrinsic muscles of the tongue
and function

Answer 13

genioglossus, hyoglossus, styloglossus, palatoglossus
-alter position of the tongue

Question 14

intrinsic muscles of the tongue

Answer 14

longitudinal, transverse, and vertical
function: regulate tongue shape
-remove from airway
-don’t act in isolation

Question 15

innervation of the tongue:

Answer 15

CN XII hypoglossal nerve

Question 16

salivary glands

Answer 16

-parotid: glossopharyngeal nerve
-submandibular nerve and sublingual nerve: facial nerve
-small accessory salivary glands scattered over the lips cheeks, tonsils, and tongue

Question 17

function of the salivary glands

Answer 17

keeps the oral mucous membrane moist, lubricates food during mastication, begins starch digestion, assist in preventing tooth decay and support ability to taste

Question 18

muscles of the mastication

Answer 18

-temporalis
-masseter
-medial pterygoid
-lateral pterygoi

Question 19

muscles of mastication
temporalis

Answer 19

elevates the mandible, closing the jaw, and retracts the mandible

Question 20

muscles of mastication
masseter

Answer 20

elevates the mandible, helps protude

Question 21

muscles of mastication
lateral pytergoid muscle

Answer 21

acts bilateral, protacts mandible and depresses the chin

Question 22

muscles of mastication
medial pterygoid muscle

Answer 22

acts as masseter to elevate

Question 23

muscles of mastication
-innervation

Answer 23

trigeminal, mandibular nerve V3

Question 24

oral cavity innervation
general sensation

Answer 24

-trigeminal V2: oral mucosa
-trigeminal V3: oral mucosa
-glossopharyngeal IX: palatine tonsil, soft palate, posterior 1/3 of tongue

Question 25

oral cavity innervation
-visceral sensory

Answer 25

-glossopharyngeal IX: inferior pharynx and larynx mucosa

Question 26

oral cavity innervation
motor

Answer 26

-trigeminal V3: muscles of mastication
-facial nerve VII: muscles of facial expression
-glossopharyngeal nerve: stylopharyngeous muscle
-vagus X: muscles of pharynx, larynx, palate, and palatoglossus
-hypoglossal XII: muscles of tongue, minus palatoglossus

Question 27

oral cavity innervation
visceral motor

Answer 27

-facial nerve CN VII: salivary glands
-glossopharyngeal nerve CN IX: parotid gland

Question 28

oral cavity innervation
special sense

Answer 28

-facial nerve VII: anterior 2/3 of tongue
-glossopharyngeal nerve IX: posterior 1/3 of tongue
-vagus nerve: epiglottis and root of the tongue