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Anatomy Exam 4 > Oral Region > Flashcards

Oral Region Flashcards

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1
Q

Where is the TMJ joint

A

where the mandibular condyle of the mandible articulates with the mandibular fossa and the articular tubercle of the temporal bone

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2
Q

What movements are possible at the TMJ?

A

depression, elevation, protrusion, retrusion, lateral (side to side) movement

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3
Q

Dislocation of the TMJ usually occurs….

A

anteriorly

when mandibular condyle displaces anterior to the articular tubercle

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4
Q

What is TMJD (temporomandibular joint disorder)?

A

pain/functional disorders that influence the muscles of mastication andTMJ

prevalence 5-12% more common in younger ppl and children

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5
Q

Innervation rule for muscles of mastication? Action rule?

A

motor innervation: mandibular n. (CN V3)

move the TMJ

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6
Q

Where is temporalis located? Where does it insert?

A

occupies temporal and infratemporal fossae

inserts onto coronoid process of mandible

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7
Q

Action of temporalis?

A

elevates and retrusion of mandible

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8
Q

Where is masseter muscle located? insertion?

A

occupies infratemporal fossa, inserts onto ramus of mandible

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9
Q

Action of mandible?

A

elevates mandible

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10
Q

Where is lateral pterygoid located? Origin? insertion?

A

occupies infratemporal fossa

O: sphenoid

I: TMJ joint capsule and mandibular condyle

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11
Q

Action of lateral pterygoid?

A

protrude mandible (bilateral)

lateral movement (unilateral)

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12
Q

Where is medial pterygoid located? Origin? Insertion?

A

occupies infratemporal fossa

O: sphenoid

I: ramus of mandible

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13
Q

Action of medial pterygoid?

A

elevate and protrude mandible (bilateral)

lateral movement (unilateral)

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14
Q

Name the 4 somatic sensory branches of mandibular n. (CN V3)

A

buccal nerve

lingual n.

auriculotemporal n.

inferior alveolar n.

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15
Q

What does the buccal n. innervate?

A

somatic sensory to cheek and mandibular gingivae

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16
Q

What does the lingual n. innervate?

A

somatic sensory to mandibular gingivae. floor of mouth and anterior 2/3 tongue

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17
Q

What does auriculotemporal n. innervate?

A

somatic sensory to ear region

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18
Q

What does inferior alveolar n. innervate?

A

somatic sensory to mandibular teeth and gingivae, chin, lip

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19
Q

Why would you perform a inferior alveolar nerve block? Where would you direct the needle?

A

to anesthetize region for dental work, direct needle toward mandibular foramen

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20
Q

Nerve to mylohyoid is a branch off of? What does it innervate?

A

inferior alveolar n.

motor to mylohyoid and anterior digastric

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21
Q

Chorda tympani is a branch off of….joins….to reach tongue

A

facial n. (CN VII)

lingual n. (CN V3)

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22
Q

What does chorda tympani innervate?

A

special sensory to anterior 2/3 of tongue

parasympathetic to submandibular and sublingual salivary glans

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23
Q

The maxillary a. is a branch off of….It gives off…..and….in the infratemporal fossa

A

External carotid a.

middle meningeal and inferior alveolar

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24
Q

middle meningeal a. supplies blood to? by passing through?

A

dura mater

foramen spinosum

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25
Inferior meningeal a. supplies blood to? by passing though?
mandibular teeth mandibular foramen and canal
26
What is the pterygoid venous plexus?
network of veins that drains much of the area supplied by the maxillary a.
27
Where does the pterygoid venous plexus drain?
pterygoid venous plexus > maxillary vein> retromandibular vein> external jugular vein
28
The pterygoid venous plexus communicates with? Why is this clinically relevant?
cavernous sinus and facial vein potential SF to deep pathway for infx
29
Where is the pterygopalatine fossa? What does it communicate with?
small space btwn maxilla and pterygoid process of sphenoid communicates with infratemporal fossa, nasal cavity, orbital and middle cranial fossa
30
How does the pterygopalatine fossa communicate with the nasal cavity?
sphenopalatine foramen
31
How does the pterygopalatine fossa communicate with the orbit?
inferior orbital fissure
32
How does the pterygopalatine fossa communicate with the middle cranial fossa?
foramen rotundum
33
Name the contents of the pterygopalatine fossa
maxillary n. pterygopalatine ganglion branches of maxillary a. -sphenopalatine, descending palatine, infraorbital and posterior superior alveolar
34
The maxillary n. exits the pterygopalatine fossa as the...
infraorbital nerve
35
The pterygopalatine ganglion receives...
preganglionic parasympathetic fibers from facial n.
36
What does the pterygopalatine ganglion supply?
lacrimal gland mucosa of nasal cavity and palate
37
Which branch of the maxillary n. supplies somatic sensory innervation to the mucosal lining of the upper lip?
infraorbital
38
Which branch of the mandibular n. supplies somatic sensory innervation to the mucosal lining of the lower lip?
mental n.
39
Which branch of the mandibular n. supplies somatic sensory innervation to the mucosal lining of the cheek?
buccal n.
40
Define gingivae
fibrous tissue with mm
41
Total number of adult teeth? how many incisors per quadrant?
32 2
42
How many canine per quadrant? Premolar? molar?
1 2 3
43
What provides somatic sensory innervation to the gingiva?
branches of the maxillary n. superior alveolar nn (via infraorbital n.) nasopalatine n. greater palatine n.
44
What provides somatic sensory innervation to the teeth?
branches of maxillary n. -superior alveolar nn.
45
What supplies blood to the maxillary teeth?
superior alveolar aa. (branches off of maxillary a.)
46
What supplies blood to the mandibular teeth?
inferior alveolar aa. | branches off maxillary a.
47
Where is the root of the tongue?
posterior 1/3 of tongue | lingual tonsil on dorsal surface
48
What is the terminal sulcus?
V shaped groove on dorsal surface of tongue separates body and root
49
What are lingual papillae
bumps on dorsal surface of body of tongue, contain taste receptors
50
What do the intrinsic muscles of the tongue do?
control shape and fine movements of the tongue
51
What do the extrinsic muscles of the tongue do?
have attachments outside of the tongue control position of tongue
52
Name the extrinsic muscles of the tongue
genioglossus styloglossus hyloglossus palatoglossus
53
Where does genioglossus attach? Action?
mandible protrude tongue, deviate tongue to side
54
Where does styloglossus attach? Action?
styloid process retrude tongue
55
Where does hyoglossus attach? Action?
hyoid bone depress tongue
56
Where does palatoglossus attach? Action?
soft palate elevate posterior tongue or depress soft palate
57
What provides somatic motor innervation to the muscles of the tongue?
hypoglossal-most of tongue muscles vagus- palatoglossus
58
What provides somatic sensory innervation to the tongue?
lingual (branch of CNV3)-anterior 2/3 glossopharyngeal (CN IX)-posterior 1/3
59
What provides special sensory innervation to the tongue?
facial nerve via chorda tympani- anterior 2/3 glossopharyngeal-posterior 1/3 vagus-near epiglottis
60
What supplies blood to the tongue?
lingual a. (branch of external carotid a.)
61
What drains blood from the tongue?
deep lingual veins, SF location on either side of the frenulum
62
Where do the deep lingual veins drain?
deep lingual veins> lingual vein > internal jugular v.
63
The parotid duct opens into..
opposite 2nd upper molar
64
List the pathway for parasympathetic innervation of the parotid gland
preganglionic cell bodies: brain > preganglionic fibers: lesser petrosal branch of glossopharyngeal > postganglionic CB: otic ganglion** postganglionic fibers: join and travel with auriculotemporal n.
65
Where is the submandibular gland located?
inferior to body of mandible
66
Submandibular ducts open into...
oral cavity on either side of the lingual frenulum
67
Where are the sublingual glands located?
deep to mucosa of oral cavity floor
68
several small sublingual ducts open...
on floor of mouth, lateral to tongue
69
List the pathway for parasympathetic innervation to the submandibular and sublingual glands
Pre CB: brain Pre fibers: facial n. via chorda tympani Post CB: submandibular ganglion > post fibers: follow arteries to reach gland

Anatomy Exam 4 (6 decks)

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