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Anatomy II > Lecture 34: Oral Cavity > Flashcards

Lecture 34: Oral Cavity Flashcards

(63 cards)

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1
Q

2 spaces/divisions of mouth due to teeth

A

vestibule
oral cavity proper

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2
Q

vestibule: definition

A

space between lips/cheeks and teeth
lips and cheek contact the teeth

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3
Q

oral cavity proper: definition, what fills this space

A

space internal to teeth
filled by tongue

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4
Q

frenulum definition/location, function

A

midline mucosal fold that fixes central portion of tongue to floor of oral cavity

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5
Q

which regions of tongue are mobile vs immobile

A

rostral = very mobile
caudal portion = immobile

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6
Q

why is caudal tongue portion immobile (what is it attached to)

A

root of tongue attached to basihyoid bone
tongue attached to epiglottis

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7
Q

what attaches tongue to epiglottis

A

median glossoepiglottic fold (midline mucosal fold)

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8
Q

valleculae: how formed, location

A

median glossoepiglottic fold creates 2 small pockets on either side of midline
caudal tongue

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9
Q

dorsal surface of tongue is characterized by

A

presence of several different kinds of papillae

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10
Q

filiform papillae: definition, location, function

A

keratinized papillae on dorsal surface of tongue
protects tongue from sharp particles of food

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11
Q

are filiform papillae associated with taste buds

A

no

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12
Q

main types of papillae in tongue (4)

A

filiform
fungiform
foliate
vallate

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13
Q

vallate papillae: definition, location

A

largest papillae in tongue
restricted to line or area towards caudal end of dorsal surface of tongue

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14
Q

ventral vs dorsal surface of tongue

A

dorsal = keratinized, tougher
ventral = less keratinized, softer, more vulnerable

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15
Q

feline papillae difference (and why important)

A

keratinized filiform papillae larger and directed caudally
aid in grooming of fur

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16
Q

which papillae gives cat tongues the characteristic rough texture

A

keratinized filiform

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17
Q

lyssa definition/location, function

A

stiff connective tissue (collagenous) rod embedded in apex of tongue
help support freely mobile apex

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18
Q

2 groups of tongue muscles

A

intrinsic
extrinsic

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19
Q

intrinsic tongue muscles: function, innervation, location

A

dorsal and lateral parts of body
control shape and movements of tongue
hypoglossal nerve

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20
Q

extrinsic tongue muscles: general function, innervation

A

control position and gross movements
hypoglossal nerve

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21
Q

4 extrinsic tongue muscles

A

genioglossus
hypoglossus
styloglossus
palatoglossus

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22
Q

genioglossus: OINA

A

O - medial surface of mandible
I - midline ventral surface of tongue
A - depress tongue
N - hypoglossal

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23
Q

hypoglossus: OINA

A

O - basihyoid
I - lateral side of caudal portion of tongue
A - retract tongue (push back during swallowing)
N - hypoglossal

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24
Q

which extrinsic tongue muscle is not innervated by CN XII

A

palatoglossus

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25
styloglossus: OINA
O - stylohyoid I - lateral surface of tongue along most of teeth N - hypoglossal A - retract tongue
26
geniohyoid: OINA (and where does it run along)
O -intermandibular articulation I - basihyoid N - hypoglossal A - draw hyoid apparatus and larynx rostrally = pull mandible down *along floor of oral cavity on either side of base of tongue
27
does geniohyoid insert on tongue
no
28
which 2 extrinsic tongue muscles retract the tongue
hypoglossus styloglossus
29
lingual artery branch of
external carotid
30
where does lingual artery branch from external carotid
where hypoglossal nerve crosses carotid
31
path of lingual artery
enters oral cavity on medial surface of hypoglossus runs on latreal surface of genioglossus as it courses through tongue to apex name change at apex of tongue --> deep lingual artery
32
lingual artery changes name to what and where
deep lingual once reaching apex of tongue
33
what facilitates heat exchange on ventral surface of tongue (think: blood vessels)
anastamoses between deep lingual artery and vein in apex of tongue
34
what nerve supplies motor to all intrinsic and extrinsic muscles of tongue (except for palatoglossus)
hypoglossal
35
path of hypoglossal nerve after crossing cranial neck
runs with lingual artery toward cranial cavity enters oral cavity on lateral surface of hypoglossus muscle supplies muscles
36
hypoglossal nerve vs lingual artery path
nerve = deep artery = superficial
37
4 cranial nerves that contribute to sensory (general and special) innervation to tongue
lingual from V3 = general sensory to anterior 2/3 facial nerve via chorda tympani = taste to anterior 2/3 glossopharyngeal = general sensory and taste to posterior 1/3 vagus = general sensory and a little taste from tongue around epiglottis
38
4 regional groups of salivary glands
parotid mandibular sublingual buccal
39
dorsal gland from buccal salivary gland is named what in dogs
zygomatic gland
40
parotid gland: location, covered in, drainage
around ear dense thick fascial capsule single parotid duct that crosses masseter --> drains to oral cavity on bucca surface
41
mandibular gland: location, drainage
caudal to mandible and sandwiched between maxillary and linguofacial veins mandibular duct from medial surface of gland through floor of oral cavity to empty in rostral part of oral cavity
42
which gland is found in between maxillary and linguofacial veins
mandibular
43
which duct crosses masseter
parotid
44
2 type of sublingual glands
monostomatic polystomatic
45
monostomatic sublingual gland: drainiage
single major sublingual duct that runs in parallel to mandibular duct
46
polystomatic sublingual gland: definition, drainage
collection of smaller more diffuse lobules of glandular tissue numerous small ducts through mucosa on floor of oral cavity
47
which type of sublingual gland is absent in horses
monostomatic
48
where do both mandibular and sublingual ducts empty
into oral cavity at sublingual caruncle
49
sublingual caruncle: definition/location
small bump of tissue lateral to root of lingual frenulum
50
what nerve do mandibular and sublingual ducts cross dorsally
lingual
51
what type of innervation do salivary glands receive (2)
sympathetic parasympathetic
52
sympathetic innervation to salivary glands: 2 patterns/ways
postganglionics from cervical spinal ganglion travel in periarterial plexuses (follow arteries) to target organs postganglionics pass through parasympathetic ganglia without synapsing and go to target organs with parasympathetics
53
parasympathetics leave brain in 4 cranial nerves
vagus oculomotor facial glossopharyngeal
54
vagus parasympathetics are for
thoracic and abdominal organs
55
oculomotor parasympathetics are for
intrinsic eye muscles
56
2 ganglia for facial parasympathetics
pterygopalatine mandibular and sublingual
57
ganglion for glossopharyngeal parasympathetics
otic
58
glossopharyngeal parasympathetics are for
parotid and buccal/zygomatic salivary glands
59
facial parasympathetics are for
mandibular and sublingual salivary glands
60
where is otic ganglion found
next to CN V3 ventral to oval foramen
61
how do pre and postganglionic parasympathetics travel for glossopharyngeal nerve
preganglionics: through middle ear ---> middle cranial fossa --> foramen ovale --> synapse on otic ganglion postganglionics: hitchhike on auriculotemporal nerve and branches to reach parotid and zygomatic glands
62
location of mandibular and sublingual ganglia
next to lingual nerve as it enters oral cavity
63
how to pre and postganglionic parasympathetics travel for facial nerve (to salivary glands)
preganglionics: through ear to infratemporal fossa --> join lingual nerve --> hitchhike to mandibular and sublingual ganglia for synapse postganglionics: pass directly to glands

Anatomy II (36 decks)

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