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Anatomy > Lecture 32 - Oral Cavity > Flashcards

Lecture 32 - Oral Cavity Flashcards

0
Q

What makes up the oral cavity proper?

A

Space internal to the teeth

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1
Q

What makes up the vestibule in the mouth?

A

Space between the lips/cheeks and the teeth

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2
Q

What are the three layers of the lips and cheeks?

A

Skin - Muscles/CT - Mucosa

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3
Q

What is major distinction between the lips and cheeks?

A

presence of the oral orifice

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4
Q

What is the frenulum?

A

Midline mucosal fold, fixes the tongue to the floor of the mouth

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5
Q

What is the root of the tongue attached to?

A

Basihyoid bone

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6
Q

What creates the valleculae in the caudal portion of the tongue?

A

midline mucosal fold to the epiglottis

medial glossoepiglottic fold

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7
Q

What is the function of the small keratinized filiform papillae on the dorsal surface of the tongue?

A

Protect it from sharp objects

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8
Q

What are the three types of papillae related to taste on the tongue?

A

Fungiform - Foliate - Vallate

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9
Q

What are Vallate papillae?

A

Largest papillae very caudal portion of the tongue

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10
Q

What is special about the feline tongue?

A

Keratinized filiform papillae are much larger and are directed caudally

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11
Q

What are the specialized papillae on a cats tongue called?

A

Conical papillae

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12
Q

What is the structure called in the tongue of cats and dogs that stiffens the tongue?

A

Lyssa

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13
Q

What are the two groups of tongue muscles?

A

Intrinsic and Extrinsic

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14
Q

What do the intrinsic tongue muscles form?

A

Dorsal and lateral parts of the body

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15
Q

What do the intrinsic muscles of the tongue do?

A

Control the shape and fine movements of the tongue

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16
Q

What are the intrinsic tongue muscles innervated by?

A

CN XII - Hypoglossal n.

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17
Q

Where do the extrinsic muscles of the tongue located?

A

Originate on other structures and insert on the tongue

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18
Q

What are the MOST of the extrinsic tongue muscles innervated by?

A

CN XII - Hypoglossal n.

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19
Q

What extrinsic tongue muscle is NOT innervated by the CN XII?

A

Palatoglossus

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20
Q

What is the origin of the genioglossus?

A

Medial surface of the mandible

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21
Q

Where does the genioglossus insert?

A

Midline ventral surface of the tongue

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22
Q

What does the genioglossus do?

A

Depress the tongue

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23
Q

What is the origin of the hyoglossus?

A

Basihyoid

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24
Where does the hyoglossus insert?
Lateral side of the caudal portion of the tongue
25
What does the hyoglossus do?
Retract the tongue
26
Where does the styloglossus originate?
Stylohyoid
27
Where does the styloglossus insert?
Lateral surface of the tongue along most of the length
28
What does the styloglossus do?
Retract the tongue
29
Where does the geniohyoid muscle originate?
Intermandibular articulation
30
Where does the geniohyoid insert?
Basihyoid
31
What does the geniohyoid do?
Draws hyoid apparatus and larynx rostrally
32
What does the lingual artery comes from?
External carotid
33
When does the lingual artery come off the external carotid?
Where the hypoglossal nerve CN XII
34
Where does the lingual artery enter the oral cavity?
Medial surface of the hyoglossus muscle
35
What is the lingual artery run in relation to on the tongue?
Lateral surface Genioglossus muscle
36
What happens to the lingual artery as it reaches the apex of the tongue?
Deep lingual artery and vessels
37
What special function do the vessels have at the apex of the tongue?
Arteriovenous anastomoses - to facilitate heat exchange and cool animal during panting j
38
What does the hypoglossal n run with?
Lingual artery after crossing through cranial neck
39
Where does the hypoglossal n. enter the oral cavity?
Lateral surface of the hyoglossus muscle
40
What are the four cranial nerves that give sensory to the tongue?
CN V3 - Lingual N. CN VII - Facial N. CN IX - Glossopharyngeal n. CN X - Vagus n.
41
What provides general sensory to the rostral portion of the tongue?
Lingual nerve
42
What provides taste to the rostral portion of the tongue?
Facial n.
43
How does the facial n. get to the rostral portion of the tongue?
Via chorda tympani hitchhiking on the lingual n.
44
What landmark shows you that you are in the rostral portion of the tongue?
Rostral to the vallate papillae
45
What does the Glossopharyngeal n. do in regards to the tongue?
Provides both sensory and taste to most of the caudal tongue
46
What does the vagal n. do in regards to the tongue?
Both general sensory and some taste of the tongue around the epiglottis
47
What are the four salivary glands?
Parotid - Mandibular - Sublingual - Buccal
48
What is different about the salivary glands in the dog?
Buccal gland has a dorsal region called zygomatic
49
Where is the duct of the parotid gland?
Runs superficially across the masseter
50
where does the parotid gland drain in the mouth?
Opposite of the fourth maxillary premolar
51
Where is the mandibular salivary gland?
Sandwiched between maxillary and linguofacial vein
52
What is the path of the duct of the mandibular salivary galnd?
Medial surface of the gland through the floor of the oral cavity to empty into the rostral part of the oral cavity
53
What are the two sublingual glands?
Monostomatic gland -- and -- Polystomatic gland
54
Where does the monostomatic gland drain?
Single major sublingual duct that runs parallel to the mandibular duct
55
Where does the polystomatic gland go?
Drain directly via numerous small ducts through the mucosa of the floor of the oral cavity
56
Where are the sublingual caruncle?
Small bump of tissue just lateral to the root of the lingual frenulum
57
What type of innervation do the salivary glands get?
SNS and PNS
58
What provide facial parasympathetics?
Pterygopalatine ganglion | Mandibular and sublingual gnaglia
59
What do the facial PNS axons synapse?
Otic ganglion
60
Where do the nerves from the otic ganglion go to?
Parotid and buccal/zygomatic glands
61
Where is the otic ganglion found?
Adjacent to CN V3 ventral to the oval foramen
62
Where to the presynaptic PNS from CN IX come from that go to teh otic ganglion?
Middle ear, middle cranial fossa, and foramen ovale
63
Where do postsynaptic PNS axons go from the otic ganglion?
Hitchhike on the auriculotemporal nerve
64
Where are the mandibular and sublingual ganglia found?
Adjacent to lingual nerve as it enters the oral cavity
65
Where do the preganglionic PNS come from in regards to the mandibular and sublingual ganglia?
Through the ear to the infratemporal fossa and join the lingual nerve

Anatomy (44 decks)

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