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oral cavity 1 Flashcards

1
Q

what mainly comprises the submandibular region?

A

the submandibular gland, suprehyoid muscles, and fascial a

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2
Q

the submandibular gland has a large ___ portion and a __ deep portion that is

A

large, small

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3
Q

the deep portion of the submandibular gland is continuous with the posterior border of ?

A

the mylohyoid muscle.

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4
Q

the suprahyoid m consist of ?

A

digastric m
stylohyoid
geniohyoid
and mylohyoid

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5
Q

what is the function of the digastric m?

A

pulls the chin down and back,

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6
Q

the anterior belly of the digastric m is innervated by? wheras posterior belly?

A

ant: v3
post: fascial as it exits sylomastoid forament

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7
Q

what is the function of the stylohyoid m

A

pulls the hyoid back to elongate the floor of the mouth

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8
Q

what is the stylohyoid innervation?

A

fascial nerve as it exits the stylomastoid foramen

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9
Q

the mylohyoid forms the muscular floor aka?

A

diaphragma oris

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10
Q

what is the innervation of the mylohyoid?

A

nerve to the mylohyoid V3

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11
Q

the mylohyoid acts as a ____ to support the muscular mass of the tongue

A

sling

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12
Q

the geniohyoid extends where

A

from the inferior genial tubercle (mental spine) to the hyoid bone.

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13
Q

what is the action of the geniohyoid?

A

protrude the hyoid

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14
Q

what is the innervation of the geniohyoid?

A

C1 via the hypoglossal nerve XII

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15
Q

what two muscles comprise the actual floor of the mouth?

A

the geniohyoid and the mylpohyoid

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16
Q

how many ducts does the submandibular gland have?

A

1

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17
Q

how does the submandibular duct leave the gland? pathway all the way to termination

A

leaves the deep portion of the submandibular gland and crosses the lingual nerve before terminating the submandibular papilla.

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18
Q

what are the three salivary gland?

A

the submandibular, parotid and sublingual

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19
Q

which salivary gland is the smallest

?

A

the sublingual gland.

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20
Q

how many openings/duct does the sublingual gland have?

A

10-30 separate openings

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20
Q

how many openings/duct does the sublingual gland have?

A

10-30 separate openings

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21
Q

where is the sublingual gland found?

A

the floor of the mouth, grooving the medial aspect of the mandible.

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22
Q

boundaries of the oral cavity

A

extends from the lips to the oropharyngeal isthmus.

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23
Q

where is the vestibule of the oral cavity

A

slit like opening between the gums/teeth and the lips/cheek

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24
where is the oral cavity proper?
within the alveolar arches
25
boundaries of the oral cavity proper
roof: hard and soft palate floor: anterior 2/3 of the tongue and the reflection of the mucous membrane off the tongue to the gums.
26
frenulum of the tongue is a ?
midline fold of mucous membrane from the tongue down onto the floor
27
orifice of the sublingual duct?
on the submandibular papillae on either side of the frenulum
28
sublingual fold?
sublingual gland under the mucous membrane
29
the tongue is a mass of skeletal muscle with a ___ ___ ___ dividng it into rt/lt halves.
median fibrous septum
30
functions of the tongue
taste, mastification, swallowing, speech.
31
what is the tongue anchored to?
the styloid process, hyoid bone, mandiblem and pharynx
32
the tongue has two parts, what are they?
the oral and pharyngeal part
33
oral part exhibits?
tip of tongue: rest against incisors margin of the tongue: related to gums and teeth dorsum of the tongue
34
the dorsum of the tongue is convex and divided into anterior 2/3 and posterior 1/3 by what?
the sulcus terminalis.
35
the median pit at the apex of the "V" of the sulcus terminalis is called the?
foramen cecum that marks the opening of the thyroglossal duct which is the spot where the thyroid descends in as an epithelial invagination.
36
the epithelium of the dorsum of the tongue exhibits what? and what are the four types.
lingual papillae 1. filiform 2. fungiform 3. curcum vallate 4. foliate
37
the filiform lingual papilla is the most _____ and has ____ tips.
numerous and kertinized tips. (food texture) no taste buds
38
fungiform is found where on the tongue?
apex
39
do the fungiform have tastebuds and if so where are they found?
yes, on lateral aspects
40
where can you find the circum vallate ? tastebuds?
numberes from 3-14 in a row anterior to the sulcus terminalis. they have taste buds on their lateral aspects
41
foliate found where?
leaf-like and located along the posterior margin of the tongue.
42
the phayrngeal part of the tongue faces ___ and forms the anterior wall of the ___
posteriorly, oropharynx.
43
the surface of the pharyngeal part of the tongue is what in comparison to the oral part?
smoother, but still contains bumps due to the lymphoid follicles projecting from the lingual tonsils.
44
the pharyneal part of the tongue have NO what | ?
lingual papillae
45
the mucous membrane of the pharyngeal portion of the tongue reflect posteriorly over onto the anterior aspect of the epiglottis forming three folds,, what are they>
a single median glossoepiglottal fold and two lateral glossoepiglotial folds.
46
the pockets inbetween the mucousal folds are pocket like and referred to as the ?
epiglottic valleculae
47
intrinsic musculature of the tongue is responsible for?
the form and shape of the tongue
48
intrinis musculatrue is ___ __ arranged into thick bundles of fibers oriented in several planes. what are they?
skeletal muscles superior, inferior longitudinal, transverse and vertical
49
the tongue is the only place in the body where skeletal muscle bundles are oriented at ___ to one another
90 degree angles.
50
4 pairs of extrinsic muscles of the tongue are?
genioglossus hyoglossus styloglossus palatoglossus
51
the genioglossus is fan shape and extends from what ?
extends from the superior genial tubuercle up into the muscle mass of the tongue
52
what does the genioglossus do ?
pulls the tongue forward to protrude the tip and depress the medial region to make the surface concave
53
the hyoglossus is flat, quadrangular muscle extending from ?
the hyoid on both sided to the tongue.
54
action of the hyoglossus>
it is a depressor that can retract the tip of the tongue.
55
what two things pass deep the the posterior border of the hyoglossus>
CN IX and lingual a
56
styloglossus arises from the? and passes where? action?
arises from the styloid process and passes to the lateral aspect of the tongue, it is a retractor.
57
palatoglossus passes up into the ____ within the _____ fold.
soft palate, palatoglossus fold.
58
what does the palatoglossus restrict?
the oropharyngeal isthmus by bringing the two anterior pillars together in the midline closing off the oral cavity of the oropharynx.
59
what is the action of the palatoglossus ?
elevates the roof of the tongue
60
the pharyngeal plexus is formed by what nerves?
pharyngeal branch of CN X, glossopharyngeal, post gang sympathetic fibers, from superior cervical ganglion.
61
blood supply of the tongue is the
lingual a
62
lymphatic drainage of the tongue: tip, anterior 2/3, posterior 1/3
tip" submental nodes ant: submandibular and deep cervical nodes posterior: deep cervical nodes
63
where are the motor fibers of the pharyngeal plexus derived from?
the cranial root of the CN XI. and distributed to all muscles of the pharynx except for the stylopharngeus CN IX, and tensor palati v3. by CN X

ANA exam 4 (4 decks)

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