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oral cavity Flashcards

1
Q

roof of oral cavity

A

hard and soft palate

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2
Q

floor of oral cavity

A

muscular diaphragm and tongue

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3
Q

slit-like space between the teeth/gums and the lips/cheeks

A

oral vestibule

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4
Q

enclosed by the dental arches

A

oral cavity proper

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5
Q

function of teeth

A

incise (cut), reduce, and mix food material with saliva during mastication
participate in articulation

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6
Q

innervation of teeth

A

CN V2: maxillary teeth
CN V3: mandibular teeth

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7
Q

blood supply of teeth

A

maxillary a.

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8
Q

describe the hard palate

A

formed by palatine processes of maxillae bones and horizontal plates of palatine bones

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9
Q

function of the soft palate

A

flutter valve: elevate to seal off the nasopharynx from the oropharynx and depress to seal off the oral cavity from the oropharynx

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10
Q

general sensation of the palate

A

CN V3

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11
Q

function of the tensor veli palatini

A

tenses soft palate
opens auditory tube when swallowing

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12
Q

innervation of tensor veli palatini

A

CN V3

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13
Q

function of salpingopharyngeus

A

elevates pahrynx

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14
Q

innervation of salpingopharyngeus

A

CN X

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15
Q

function of levator veli palatini

A

elevate soft palate above the neutral position

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16
Q

innervation of levator veli palatini

A

CN X

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17
Q

function of palatoglossus

A

depresses palate and elevates back of tongue

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18
Q

function of palato-pharyngeus

A

depresses palate and elevates pharynx

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19
Q

innervation of palatoglossus and palatopharyngeus

A

CN X

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20
Q

function of mylohyoid

A

elevates the floor of the mouth and elevates hyoid bone

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21
Q

innervation of mylohyoid

A

CN V3

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22
Q

function of geniohyoid

A

if mandible is fixed: elevates and pulls hyoid bone anteriorly
if hyoid is fixed: pulls mandible downward and inward

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23
Q

innervation of geniohyoid

A

anterior ramus of C1

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24
Q

describe the terminal sulcus

A

v shaped groove characteristic of dorsum of tongue
angle points posteriorly to foramen cecum

25
inferior surface of tongue is connected to floor of the mouth by midline fold
frenulum
26
present on each side at the base of the frenulum where the submandibular duct opens into the oral cavity
sublingual carunles
27
veins of the tongue
dorsal lingual vein (accompany lingual a.) deep lingual veins (run posteriorly to join sublingual vein)
28
general sensation and taste of anterior 2/3 of tongue
general sensation: V3 via lingual n. taste: CN VII via chordae tympani
29
general sensation and taste of posterior 1/3 of tongue
CN IX with small area innervated by CN X (internal laryngeal branch)
30
motor control of the tongue
CN XII except palatoglossus (CN X)
31
describe the extrinsic muscles of the tongue
genioglossus: protrudes tongue (CN XII) hypoglossus: depresses tongue (CN XII) styloglossus: elevates and retracts tongue (CN XII) palatoglossus: elevates tongue and depresses soft palate (CN X)
32
primary blood supply of the tongue
lingual a.
33
blood supply of the palate
greater and lesser palatine a. (branches of maxillary a.)
34
describe the lymphatic drainage of the tongue
root of tongue: bilaterally into superior deep cervical nodes medial part of body: bilaterally into inferior deep cervical nodes right and left lateral parts of body: ipsilateral submandibular nodes apex and frenulum: submental nodes
35
describe the submandibular gland
wraps around posterior aspect of mylohyoid m. duct runs anteriorly with lingual n. passing under it
36
describe the sublingual gland
smallest most deeply situated lie in floor of mouth between mandible and genioglossus m. numerous ducts
37
describe the innervation of the tongue
lingual n. (CN V3) carries GSA from anterior 2/3 chorda tympani (CN VII) joins lingual to carry SVA from anterior 2/3 and GVE for sublingual and submandibular glands CN IX carries SVA from posterior 1/3 and GVE to parotid gland
38
describe hypoglossal innervation
intrinsic muscles of tongue extrinsic muscles except palatoglossus
39
important relationships of CN XII
crosses anterior to external carotid a. travels with lingual a. courses over internal carotid a. and deep to posterior belly of digastric
40
what is the pharynx?
musculofascial half-cylinder that links the oral and nasal cavities to the larynx and esophagus
41
function of pharyngeal constrictors
contract sequentially from top to bottom, moving a bolus of food from the pharynx toward the esophagus
42
innervation of the pharynx
CN X
43
sac-like outpouching of the pharynx through an area of muscular weakness between the transverse fibers of cricopharyngeus and oblique fibers of lower inferior constrictor m.
Zenker's diverticulum
44
3 pharyngeal levator muscles
stylopharygneus (CN IX) salpingopharyngeus (CN X) palatopharyngeus (CN X)
45
function of pharyngeal levator muscles
elevate pharyngeal wall up and over bolus of food being moved from pharynx to esophagus
46
motor innervation of pharynx
all muscles of pharynx and soft palate innervated by CN X except stylopharyngeus (CN IX) and tensor veli palatini (CN V3)
47
sensory innervation of pharynx
CN IX
48
describe gag reflex innervation
efferent limb: CN IX afferent limb: CN X
49
feature on lateral wall of nasopharynx
pharyngeal opening of pharyngotympanic tube
50
what is the torus tubarius?
posterior rim of auditory tube forms a bulge on the pharyngeal wall
51
what is the pharyngeal recess?
deep recess behind the torus tubarius
52
what are the palatoglossal folds?
cover palatoglossal m. and mark boundary between oral cavity and oropharynx
53
what are the palatopharyngeal folds?
posterior to palatoglossal folds overlie the palatopharyngeus m.
54
what are the valleculae?
pair of mucosal pouches between base of tongue and epiglottis
55
what tonsils make up the tonsillar ring?
pharyngeal tonsils (adenoids) tubal tonsils palatine tonsils lingual tonsils
56
describe the laryngopharynx
rests against C4-6 posterior and lateral walls are formed by middle and inferior pharyngeal constrictor m. internal wall formed by palatopharyngeus and stylopharyngeus m.
57
what is the laryngeal inlet?
communication between laryngopharynx to larynx
58
what is the piriform fossa?
small mucosal lined depression on either side of the laryngeal inlet
59
describe the innervation of swallowing stages
oral transit: CN VII, X, XII (seal lips and elevate tongue) seal: CN V, IX, X (elevate soft palate and elevate and protract hyoid) protect larynx: CN V, VII, IX, X, C1 (adduct vocal cords, elevation and protraction of hyoid, contract pharyngeal constrictors)

GRDA (13 decks)

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