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602 Exam 3 > Infratemporal Fossa I > Flashcards

Infratemporal Fossa I Flashcards

1
Q

Infratemporal fossa is located ___ of the mandible

A

Deep to the ramus

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2
Q

What is the roof boundary? What does it communicate to?

A

base of the greater wing of the sphenoid bone (including the infratemporal crest)

communicates to the temporal fossa

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3
Q

What is the posterior boundary? What forms the boundary?

A

Skeletal component is the styloid process

Parotid gland

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4
Q

What is the anterior boundary?

A

Skeletal part is formed by the posterior aspect of maxilla (including maxillary tuberosity)

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5
Q

What is the medial boundary (for hard & soft tissue)?

A

Hard tissue boundary formed by lateral pterygoid plate

Soft tissue boundary formed by muscles of the pharynx (superior pharyngeal constrictor & the tensor veli palatini)

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6
Q

What is the inferior boundary?

A

Nothing, it’s open completely

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7
Q

What is the lateral boundary?

A

Ramus of mandible

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8
Q

The infratemporal fossa communicates w/ ___ anterioly & ___ anteriorly & laterally

A

Orbit anteriorly

pterygopalatine fossa anterioly & laterally

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9
Q

Opening between infratemporal fossa & orbit

A

inferior orbital fissure

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10
Q

Opening between infratemporal fossa & pterygopalatine fossa

A

pterygomaxillary fissure

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11
Q

Opening between pterygopalatine fossa & nasal cavity

A

sphenopalatine fissure (foramen)

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12
Q

Where do V3, V2 & maxillary pass through in regards to the infratemporal fossa? Then where do they travel to?

A

V3 enters through infratemporal fossa

Maxillary artery enters through infratemporal fossa & travels to nasal cavity & orbit

CN V2 enters through pterygopalatine fossa & travels to nasal cavity, orbit & infratemporal fossa

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13
Q

Origin, insertion & action for medial pterygoid muscle

A

Origin: Medial aspect of lateral pterygoid plate
Insertion: Inner aspect of angle of mandible
Action: Elevate the mandible & laterally deviate it to the opposite side

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14
Q

Origin, insertion, & action for superior head of lateral pterygoid muscle

A

Origin: Infratemporal crest of sphenoid bone
Insertion: Joint capsule of temporomandibular joint
Action: Protrudes the mandible

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15
Q

Origin, insertion, & action for lateral head of lateral pterygoid muscle

A

Origin: Lateral aspect of lateral pterygoid plate
Insertion: Fovea on the neck of the condyle process of mandible
Action: Protrudes the mandible

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16
Q

The pterygoid muscles run at a ___ angle to each other

A

90 degree

17
Q

What is within the first part of the maxillary artery? What do each of these arteries supply to?

A

Deep auricular artery
- Supplies portion to external ear canal

Anterior tympanic artery
- Supplies portion to middle ear cavity

Middle meningeal artery
- Supplies to dura

Accessory meningeal artery
- Supplies to dura

Inferior alveolar artery
- Supplies to pulp of all mandibular teeth

18
Q

What is within the 2nd part of the maxillary artery? What do each of these arteries supply to?

A

Deep temporal artery
- Supplies to temporalis muscle

Buccal artery
- Supplies to buccal region
- Supplies to inner & outer surfaces of cheek & buccinator muscle

Pterygoid artery
- Supplies to pterygoid muscle

Masseteric artery
- Supplies to masseter muscle

19
Q

What is within the third part of the maxillary artery? What do each of these arteries supply to?

A

Posterior superior alveolar artery
- Supplies to pulp of maxillary molar teeth

20
Q

Describe the pterygoid plexus. What does it communicate w/?

A
  • Created by veins in the infratemporal fossa
  • Maxillary vein drains the pterygoid plexus
  • Infection of face can get into the pterygoid plexus
  • Communicates w/ cavernous sinus in brain
21
Q

Mandibular nerve enters infratemporal fossa through

A

foramen ovale

22
Q

What are the motor branches of the mandibular nerve?

A

muscles of mastication (4)
suprahyoid muscles (anterior belly of digastric muscle & mylohyoid muscle)
to the 2 tensors in the nasopharynx (T. tympani & T. veli palatini)

23
Q

Mandibular nerve is the only ___ nerve of the branches of the trigeminal nerve

A

mixed

24
Q

What are the sensory branches of the mandibular nerve? What do each of them provide sensory for?

A
  • Long buccal nerve - Sensory to skin over buccinator, buccal mucosa, buccal gingiva
  • Lingual nerve - Sensory to mucosa of anterior ⅔ of tongue, floor of mouth, lingual gingiva
  • auriculotemporal nerve - Sensory to part of external ear, scalp, TMJ
  • inferior alveolar nerve - Sensory to mandibular teeth, lower lip & skin overlying chin (by giving off a branch called the mental nerve), & provides motor to mylohyoid & ABD
  • nerve to mylohyoid
  • posterior superior alveolar nerve - Sensory to pulp of maxillary molar teeth
25
Q

Location of the branch point of maxillary nerve that gives you posterior superior alveolar nerve?

A

pterygopalatine fossa

26
Q

Parasympathetics comes into infratemporal fossa through

A

chorda tympani

27
Q

Describe how the chorda tympani travels & eventually joins the lingual nerve

A

Chorda tympani travels posterity to tympanic membrane, exits middle ear cavity & enters infratemporal fossa through the petrotympanic fissure (the same fissure that transmits the anterior tympanic artery (branch from first part of maxillary artery)), & enters infratemporal fossa deep to temporal mandibular joint, travels anteriorly & joins the lingual nerve

28
Q

Where is the parasympathetic destination?

A

submandibular gland

29
Q

Describe the chorda tympani

A

It carries 1st neuron of parasympathetics from facial nerve (CN VII) & carries special sensation fibers of taste from facial nerve

30
Q

What is the pathway from the glossopharyngeal nerve to the parotid gland

A

Start w/ glossopharyngeal nerve → branch forms plexus in middle ear cavity → coalesce as single nerve as a lesser petrosal nerve in cranial cavity → exits through foramen ovale → synapses in otic ganglia (located on deep surface of mandibular nerve) → 2nd order neurons reach parotid gland w/ auriculotemporal nerve

31
Q

The otic ganglia is the location where

A

Location where 1st & 2nd order neurons synpase

32
Q

What’s passes through the following:
foramen ovale, foramen spinosum, posterior superior alveolar foramina, mandubular foramen, inferior orbital fissure, petrotympanic fissure, & pterygomaxillary fissure?

A

Foramen ovale
- Mandibular nerve

Foramen spinosum
- Medial meningeal artery

Posterior superior alveolar foramina
- Arises from the maxillary nerve

Mandibular foramen
- Inferior alveolar artery passes through

Inferior orbital fissure
- Infraorbital artery, nerve & vein pass through it

Petrotympanic fissure
- Chorda tympani passes through

Pterygomaxillary fissure
- Posterior superior alveolar nerve passes through

33
Q

All sympathetic innervation for the head comes from

A

T1 of spinal cord

34
Q

___ nerve block happens in infratemporal fossa

A

Inferior alveolar

602 Exam 3 (11 decks)

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