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LECOM MS1 Gross Anatomy Exam 3 > Head: Muscles of Mastication and Infra-temporal fossa > Flashcards

Head: Muscles of Mastication and Infra-temporal fossa Flashcards

1
Q

What is the lateral pterygoid plate an extension of

A

the sphenoid bone

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2
Q

What are the boundaries of the infratemporal fossa

A

anterior: posterior maxilla

Posterior: styloid process

Medial: lateral pterygoid plane, tensor veli palatini, levaotr veli palatini, pharynx

Roof: base of skull (sphenoid bone and temporal bone

Lateral: Ramus of mandible

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3
Q

What nerve will travel through the foramen ovale

A

Mandibular nerve V3

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4
Q

Where are the foramen ovale and spinosum found

A

roof of infratemporal crest

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5
Q

What are the muscles of mastication within the head

A

Temporalis
Masseter
Lateral Pterygoid
Medial Pterygoid

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6
Q

What joint will the muscles of mastication act on

A

temporalmandibular joint

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7
Q

where does the lateral pterygoid muscle insert

A

TMJ

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8
Q

What things will cause depression of the mandible

A

gravity
mylohyoid
anterior digastric
medial pterygoid

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9
Q

What is the action of the temporalis muscle

A

elevate mandible

retracts mandible

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10
Q

What is the action of the masseter muscle

A

elevates mandible

little protraction

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11
Q

What are the attachments of the temporalis muscle

A

temporal fossa

coronoid process of mandible

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12
Q

What are the attachments of the masseter muscle

A

zygomatic arch to inferior angle of mandible

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13
Q

What are the attachments of the lateral pterygoid muscle

A

Proximal: greater wing of sphenoid and lateral aspect of lateral pterygoid plate

Distal: neck of mandible and capsule of TMJ

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14
Q

What are the attachments of the medial pterygoid muscle

A

Proximal: maxillary tuberosity; medial aspect of lateral pterygoid plate

Distal: ramus of mandible

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15
Q

What are the two places in which a “medial pterygoid sandwhich will be seen”

A

inferior angle of the mandible

lateral pterygoid plate

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16
Q

What are the bilateral and unilateral actions of lateral pterygoid

A

Bilateral: protrude mandible, depress mandible

Unilateral: grinding

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17
Q

What are the bilateral and unilateral actions of the medial pterygoid muscle

A

Bilateral: elevate and help protrude mandible

Unilateral: grinding

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18
Q

What are the muscles of mastication innervated by

A

V3

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19
Q

What type of joint is the temporomandibular joint

A

synovial modified hinge

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20
Q

What are the articular surfaces of TMJ covered with

A

fibrocartilage

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21
Q

What are the three articular surfaces of the temporomandibular joint

A

Condyle of mandible
mandibular fossa of temporal bone
articular tubercle of temporal bone

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22
Q

What is the function of the capsule of the TMJ

A

attaches neck of mandible to margins of mandibular fossa

23
Q

What is the function of the lateral temporomandibular ligament

A

thickening of the capsule; prevents posterior dislocation

24
Q

What does the articular disc divide the TMJ into

A

upper joint and lower joint cavities

25
Q

What is the articular disc of the TMJ made of

A

fibrocartilage

26
Q

What type of motion does the lower joint cavity of the TMJ allow for

A

rotation (hinge movement) during mandible depression

27
Q

What type of motion does the upper joint cavity of the TMJ allow

A

translation (protraction and retraction; articular disc slides anteriorly over articular tubercle for greater ROM

28
Q

What is the middle meningeal nerve a branch of and where is it seen

A

branch of V3

enters foramen spinosum

29
Q

What does the middle meningeal nerve innervate

A

Dura

30
Q

How will cranial nerve V3 exit the skull

A

foramen ovale

31
Q

What are the origins of the 2 buccal nerves

A

buccal nerve from facial

buccal nerve from V3

32
Q

What type of information is carried by buccal nerve from facial

A

GSA; sensory to the cheek

33
Q

What type of information is carried by buccal nerve from V3

A

GSE; motor

34
Q

Where will GSAs from auriculotemporal nerve supply sensation to

A

TMJ
Ear
Parotid region
Temple

35
Q

What does the inferior alveolar nerve innervate

A

Teeth
Bottom gums
Sensation to chin and lower lip (via mental n)

36
Q

What are the two types of information carried by chorda tympani

A

GVE: parasympathetic, GVAs follow

SVA

37
Q

What does the GVE from chorda tympani allow for

A

innervation of salivary glands in and around the oral cavity

38
Q

What does SVA of chorda tympani allow for

A

taste from anterior 2/3 of tongue

39
Q

What is the maxillary artery a branch of

A

external carotid

40
Q

Where does the maxillary artery originate within

A

parotid gland

41
Q

The maxillary artery passes through the infratemporal foss to enter what

A

pterygopalatine fossa

42
Q

How does the maxillary artery enter the pterygopalatine fossa

A

pterygomaxillary fissure

43
Q

What muscle will branches of the maxillary artery emerge through

A

lateral pterygoid muscle

44
Q

What are the 3 parts of the maxillary

A

retromandibular
pterygoid
pterygopalatine

45
Q

What is the only branch of the maxillary artery that will not travel with accompanying nerve

A

lingual artery

46
Q

What are the branches off the 1st part of the maxillary artery

A 
Deep auricular
Accessory meningeal
Middle meningeal
Inferior alveolar artery
Anterior tympanic
47
Q

What nerve will loop around the middle meningeal artery

A

auriculotemporal nerve

48
Q

What does the middle meningeal artery supply

A

dura mater

49
Q

What branches will come off the 2nd part of the maxillary artery

A

masseteric
pterygoid
deep temporal
buccal

50
Q

What are the branches of the 3rd part of the maxillary artery

A

sphenopalatine
descending palatine
infraorbital
posterior alveolar

51
Q

What structures have communication with the pterygoid venous plexus

A 
cranial cavity+ brain
orbit
oral cavity+ teeth
face+ paranasal sinuses
Nasal cavities+nasopharynx
52
Q

Where is the pterygoid venous plexus found

A

ITF

53
Q

Where does the pterygoid venous plexus drain

A

retromandibular vein

LECOM MS1 Gross Anatomy Exam 3 (17 decks)

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