Lecture 28 - Oral Cavity Flashcards Preview

Viscera & Visceral Systems > Lecture 28 - Oral Cavity > Flashcards

Flashcards in Lecture 28 - Oral Cavity Deck (43):
1

What is the masseter muscle3?

origin on mandible, runs up to the zygoma (cheek bone)

chewing muscle - mastication

2

What is the features of temporalis?

origin along the temporal bone

projects down to the condyle of the mandible

3

orbicularis is important for...

forming a seal around drinks, kissing

stroke victims may be compromised - can't close their mouth properly

4

What muscle fills the gap between orbicularis oris and masseter?

Buccinator - forms most of the cheek

5

what forms the roof of the mouth:

Palatine process of maxilla

6

going through the layers of the soft palate, what is there:

palatine glands
Greater palatine nerve and artery/ Lesser palatine nerve

7

The Greater palatine nerve and artery/ Lesser palatine nerve project up into the

nasal cavity

8

What makes up the floor of the mouth?

Mylohyoid muscle - makes up the floor

extends to the Hyoid bone


On the internal surface there is the Geniohyoid muscle

inferiorly there are a few others

9

Where does the Lingual nerve go?

into the floor of the mouth to supply the tongue

10

What innervates the lower teeth?

Inferior alveolar nerve

11

The part sof the maxilla and Mandible that are embedding the tooth:

alveolar arches

12

Where is the oral vestibule?

between cheek and teeth

13

Th tongue divided by what?

ant 2/3 posterior 1/3

by a V-shaped groove called the sulcus terminalis

14

What is deep to the mucosa on the psoterior 1/3 of the tonuge?

Lingual tonsils - cluster of lymphoid tissue

15

What is deep to the mucosa on the anterior 2/3 of the tonuge?

Papillae - number of different types:

Valate papillae -at the sulcus terminalis

Foliate pappillae - posterolaterally

Fungiform papillae - on the entire surface

16

What is the foramen caecum

depression downwards towards the neck at the apex of the sulcus terminalis

Thyroid gland develops from this - the ducts close up, this is a remnant

17

The taste buds are embedded in the walls of the ____

pappilar - particularly the circumvalate

18

Describe the filiform papillae?

line most of the tongue, small, don't have taste buds

give the tongue a rough surface - to help pick up food (mostly for animals)

19

What are the Extrinsic muscles of tongue?

Styloglossus
Palatoglossus
Genioglossus
Hyoglossus

20

what are the features of Palatoglossus

contraction elevates the tongue - towards the palate

21

what are the features of Styloglossus

stylo-styloid process

retracts the tongue

22

what are the features of Hyoglossus

runs from the hyoid bone towards the tongue

depresses the tongue downwards

23

what are the features of Genioglossus?

from the inferior surface fot he tongue

pulls the back fo the tongue forward twoards the mandible

prorusion of the tongue

24

All tongue extrinsic muscles are innervated with the exception of palatoglossus - by the ...

CNX11 - hypoglossal

palatoglossus - pharyngeal branch of Vagus

25

What are the groups of intrinisic muscles?

what nerve?

transverse and vertical
Superior Longitudinal
Inferior longitudinal

CNX11

26

What types of sensory nerves are in the tongue?

General sensory - touch, pressure

Special sensroy - taste

different for both to the 1/3 and 2/3s

27

In the anterior 2/3 what gives the general sensroy info?

Lingual nerve (trigeminal branch - mandibular division)

28

In the anterior 2/3 what gives the special sensroy info?

chorda tympani - branch of CN7

facial nerve

29

In the posterior 1/3 what gives the special and general sensory info?

glossophrangeal (CN9)

30

How many incisor, canine, premolar and molar teeth

4 incisors

1 canine

2 premolars

3 molars

31

What innervates teeth in the maxilla?

superior alveolar nerve

branch of maxillary division of trigminal nerve

32

What innervates teeth in the mandible?

inferioer alveolar nerve - runnin gin the mandibular canal

33

What does the tooth crown consist of?

Enamel and Dentin

34

What does the tooth root consist of?

pulp - very vascular and nerve heavy

35

when do primary teeth erupt out?

6-24 months

36

adult teeth erupt when?

from 7 years - front to back

37

The upper and lower ____ erupt out of sequence to the rest of the teeth

canines - late

1st molar - earlier

38

Wisdom teeth is the ...

3rd molar

39

What is the function of saliva?

lubricate while chewing

enzymes

antimicrobial properties

40

Where is the parotid salivary gland?

superficial

over the top of massetor mscule - has a single duct that goes through massetor

41

Where is the submandibular salivary gland?

wraps around the free psoterior border of mylohyoid muscle - floor of oral cavity

duct comes from the internal part that projects foraward near the lingual frenulum

42

Where is the sublingualsalivary gland?

on the floor of the mouth - many ducts

43

What other strucutre are in the floor of the mouth?

Lingual arteries and veins - quick absorption of drugs

hypoglossal nerve (CN12)