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Gross II > Infratemporal Fossa > Flashcards

Infratemporal Fossa Flashcards

1
Q

What are the borders of the infratemporal fosaa

A

Anterior: maxilla
Medial: lateral pterygoid plate
Roof: greater wing of sphenoid
lateral: ramus of mandible

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2
Q

What three areas communicate with the infratemporal foss

A

Superiorly: Temporal Fossa
Cranial Cavity: Foramen Ovale, Foramen Spinosum,
Orbit: inferior orbital fissure

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3
Q

What is the origin of the medial pterygoid muscle

A

Medial surface of the lateral pterygoid plate of sphenoid

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4
Q

What is the insertion of the medial pterygoid

A

Medial surface of the ramus of the mandible

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5
Q

What is the action of the medial pterygoid

A

elevates, contralaterally deviates, and protracts the mandible

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6
Q

What is the innervation of the medial pterygoid muscle

A

Medial pterygoid nerve (V3)

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7
Q

What is the origin of the lateral pterygoid

A

Inf Head: lateral surface of pterygoid plate

Sup Head: Greater wing of the sphenoid

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8
Q

What is the insertion of the lateral pterygoid

A

Neck of the mandibular condyle, TMJ capsule, articular disc

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9
Q

What is the action of the lateral pterygoid muscle

A

Depresses, contralaterally deviates and protracts the mandible

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10
Q

What is the innervation of the lateral pterygoid muscle

A

Lateral pterygoid nerve (V3)

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11
Q

What is the origin of the masseter

A

zygomatic arch

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12
Q

What is the insertion of the masseter

A

lateral surface of mandibular ramus

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13
Q

What is the action of the masseter muscle

A

elevates the mandible and protrudes

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14
Q

What is the innervation of the masseter muscle

A

Masseteric nerve (V3)

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15
Q

What is the origin of the temporalis muscle

A

temporal fossa

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16
Q

What is the insertion for the temporalis muscle

A

coronoid process of mandibular ramus

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17
Q

What is the action of the temporalis muscle

A

elevates and retracts the mandible

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18
Q

What is the innervation of the temporalis muscle

A

Deep Temporal nerves (V3)

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19
Q

What is the major artery of the infratemporal fossa

A

Maxillary artery

20
Q

What does the auricular artery and tympanic artery supply

A

Ext ear, ext auditory canal, tympanic membrane, TMJ

21
Q

What does the middle meningeal artery supply

A

cranial dura, cranial bones

22
Q

How does the inferior alveolar artery travel

A

enters the mandible on its medial surface via the mandibular foramen and traverses the mandibular canal

23
Q

What does the inferior alveolar artery supply

A

mandible
teeth and gums
soft tissues of the chin

24
Q

What muscles are innervated by the muscular branches of the maxillary artery

A

Temporalis
Masseter
Pterygoids

25
Q

What is supplied by the buccal artery

A

soft tissues of the cheek

26
Q

What is supplied by the posterior superior alveolar artery

A

posterior teeth of the upper jaw

27
Q

What is supplied by the infraorbital artery

A

anterior face, maxillary sinus, anterior teeth of maxilla

28
Q

What is supplied by the sphenopalatine artery

A

nasal cavity
palate
sinuses

29
Q

How does the sphenopalatine artery enter the sphenopalatine fossa

A

passes through the pterygomaxillary fissure

30
Q

Where do the veins of the infratemporal fossa drain to

A

pterygoid venous plexus of veins

31
Q

Where does the pterygoid plexus drain into

A

facial or retromandibular veins

32
Q

What type of neurons make up the mandibular nerve (V3)

A

sensory and motor neurons

33
Q

How does V3 enter the infratemporal fossa

A

foramen ovale

34
Q

What do the motor branches innervate

A

muscles of mastication

35
Q

What is innervated by the meningeal nerve

A

Dura of the middle cranial fossa

36
Q

What are the muscular branches of the mandibular nerve

A

Masseteric n
Medial pterygoid n
Lateral pterygoid n
Deep temporal nerves (temporalis muscle)

37
Q

What is innervated by the Buccal nerve

A

sensory to the skin of the cheek and mucous membrane inside the cheek

38
Q

What is innervated by the auriculotemporal nerve

A

pinna of the ear
skin of the temporal region
some of the tympanic membrane
TMJ – important

39
Q

What is innervated by the lingual nerve

A

sensory to the anterior 2/3 of tongue

floor of the oral cavity

40
Q

What is the chorda tympani nerve a branch of

A

CN 7

41
Q

How does the chorda tympani nerve travel

A

hitchhikes with the lingual nerve

42
Q

What is innervated by the inferior alveolar nerve

A

all teeth of the lower jaw

43
Q

What are the two terminal branches from the inferior alveolar nerve

A

Mental nerve

myolohyoid nerve

44
Q

What is innervated by the mental nerve

A

skin near the chin and lower lip

45
Q

What is innervated by the myolohyoid nerve

A

motor to myolohyoid and anterior belly of digastric muscles

Gross II (13 decks)

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