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a_anatomy > Lecture 32 - Oral Cavity > Flashcards

Lecture 32 - Oral Cavity Flashcards

1
Q

What makes up the oral cavity proper?

A

Space internal to 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
Q

Where does the hyoglossus insert?

A

Lateral side of the caudal portion of the tongue

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25
Q

What does the hyoglossus do?

A

Retract the tongue

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26
Q

Where does the styloglossus originate?

A

Stylohyoid

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27
Q

Where does the styloglossus insert?

A

Lateral surface of the tongue along most of the length

28
Q

What does the styloglossus do?

A

Retract the tongue

29
Q

Where does the geniohyoid muscle originate?

A

Intermandibular articulation

30
Q

Where does the geniohyoid insert?

A

Basihyoid

31
Q

What does the geniohyoid do?

A

Draws hyoid apparatus and larynx rostrally

32
Q

What does the lingual artery comes from?

A

External carotid

33
Q

When does the lingual artery come off the external carotid?

A

Where the hypoglossal nerve CN XII

34
Q

Where does the lingual artery enter the oral cavity?

A

Medial surface of the hyoglossus muscle

35
Q

What is the lingual artery run in relation to on the tongue?

A

Lateral surface Genioglossus muscle

36
Q

What happens to the lingual artery as it reaches the apex of the tongue?

A

Deep lingual artery and vessels

37
Q

What special function do the vessels have at the apex of the tongue?

A

Arteriovenous anastomoses - to facilitate heat exchange and cool animal during panting j

38
Q

What does the hypoglossal n run with?

A

Lingual artery after crossing through cranial neck

39
Q

Where does the hypoglossal n. enter the oral cavity?

A

Lateral surface of the hyoglossus muscle

40
Q

What are the four cranial nerves that give sensory to the tongue?

A

CN V3 - Lingual N.
CN VII - Facial N.
CN IX - Glossopharyngeal n.
CN X - Vagus n.

41
Q

What provides general sensory to the rostral portion of the tongue?

A

Lingual nerve

42
Q

What provides taste to the rostral portion of the tongue?

A

Facial n.

43
Q

How does the facial n. get to the rostral portion of the tongue?

A

Via chorda tympani hitchhiking on the lingual n.

44
Q

What landmark shows you that you are in the rostral portion of the tongue?

A

Rostral to the vallate papillae

45
Q

What does the Glossopharyngeal n. do in regards to the tongue?

A

Provides both sensory and taste to most of the caudal tongue

46
Q

What does the vagal n. do in regards to the tongue?

A

Both general sensory and some taste of the tongue around the epiglottis

47
Q

What are the four salivary glands?

A

Parotid - Mandibular - Sublingual - Buccal

48
Q

What is different about the salivary glands in the dog?

A

Buccal gland has a dorsal region called zygomatic

49
Q

Where is the duct of the parotid gland?

A

Runs superficially across the masseter

50
Q

where does the parotid gland drain in the mouth?

A

Opposite of the fourth maxillary premolar

51
Q

Where is the mandibular salivary gland?

A

Sandwiched between maxillary and linguofacial vein

52
Q

What is the path of the duct of the mandibular salivary galnd?

A

Medial surface of the gland through the floor of the oral cavity to empty into the rostral part of the oral cavity

53
Q

What are the two sublingual glands?

A

Monostomatic gland
– and –
Polystomatic gland

54
Q

Where does the monostomatic gland drain?

A

Single major sublingual duct that runs parallel to the mandibular duct

55
Q

Where does the polystomatic gland go?

A

Drain directly via numerous small ducts through the mucosa of the floor of the oral cavity

56
Q

Where are the sublingual caruncle?

A

Small bump of tissue just lateral to the root of the lingual frenulum

57
Q

What type of innervation do the salivary glands get?

A

SNS and PNS

58
Q

What provide facial parasympathetics?

A

Pterygopalatine ganglion

Mandibular and sublingual gnaglia

59
Q

What do the facial PNS axons synapse?

A

Otic ganglion

60
Q

Where do the nerves from the otic ganglion go to?

A

Parotid and buccal/zygomatic glands

61
Q

Where is the otic ganglion found?

A

Adjacent to CN V3 ventral to the oval foramen

62
Q

Where to the presynaptic PNS from CN IX come from that go to teh otic ganglion?

A

Middle ear, middle cranial fossa, and foramen ovale

63
Q

Where do postsynaptic PNS axons go from the otic ganglion?

A

Hitchhike on the auriculotemporal nerve

64
Q

Where are the mandibular and sublingual ganglia found?

A

Adjacent to lingual nerve as it enters the oral cavity

65
Q

Where do the preganglionic PNS come from in regards to the mandibular and sublingual ganglia?

A

Through the ear to the infratemporal fossa and join the lingual nerve

66
Q

What makes up the vestibule in the mouth?

A

Space between the lips/cheeks and the teeth

a_anatomy (43 decks)

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