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ESA 4 - Head and Neck > Infratemporal Fossa > Flashcards

Infratemporal Fossa Flashcards

1
Q

What is the infratemporal fossa?

A

An irregularly shaped space

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2
Q

Where is the infratemporal fossa found?

A
  • Deep and inferior to the zygomatic arch
  • Deep to ramus of mandible
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3
Q

What are the borders of the infratemporal fossa?

A
  • Superior
  • Anterior
  • Inferior
  • Medial
  • Lateral
  • Posterior
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4
Q

What is the superior border of the infratemporal fossa?

A

Inferior greater wing of sphenoid

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5
Q

What is the anterior border of the infratemporal fossa?

A

Posterior maxilla

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6
Q

What is the inferior border of the infratemporal fossa?

A

Medial pterygoid muscle attachment at the mandible

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7
Q

What is the medial border of the infratemporal fossa?

A

Lateral pterygoid plate of sphenoid

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8
Q

What is the posterior border of the infratemporal fossa?

A

Temporal boen

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9
Q

What is the lateral border of the infratemporal fossa?

A

Ramus of mandible

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10
Q

What is the contents of the infratemporal fossa?

A
  • 3 muscles
  • Maxillary artery
  • Pterygoid venus plexus
  • Nerves
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11
Q

What muscles are in the infratemporal fossa?

A
  • Inferior part of temporal muscle
  • Lateral and medial pterygoid muscles
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12
Q

What does the pterygoid venous plexus communicate with?

A

The cavernous sinus

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13
Q

What nerves are in the infratemporal fossa?

A
  • Mandibular branch of trigeminal
  • Otic ganglion
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14
Q

What does the mandibular branch of the trigeminal nerve give off in the infratemporal fossa?

A
  • Inferior alveolar nerve
  • Lingual nerve
  • Buccal nerve
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15
Q

What does the inferior alveolar nerve innervate?

A

The lower teeth

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16
Q

How does the inferior alveolar nerve continue?

A

As the mental nerve

17
Q

What does the lingual nerve supply?

A

Sensory to the anterior 2/3 of the tongue

18
Q

What does the lingual nerve carry?

A

Chorda tympani fibres from the facial nerve

19
Q

What do chorda tympani fibres supply?

A

Special sensory to anterior 2/3 of tongue

20
Q

What does the buccal nerve supply?

A

Sensory to cheek and buccal gum

21
Q

What does the otic ganglion supply?

A

Parasympathetics of parotid gland

22
Q

What is the clinical relevance of the infratemporal fossa?

A
  • Fossa can be site for isolated infections
  • Rarely, site of tumours
  • Can be used as site for mandibular nerve blocks
23
Q

Who may get an infection in the infratemporal fossa?

A

Diabetic patients

24
Q

What is there a risk of if infection is present in the infratemporal fossa?

A

Cavernous sinus thrombosis,

25
Q

Why is there a risk of cavernous sinus thrombosis if there is an infection in the infratemporal fossa?

A

Due to venous communication with the pterygoid venous plexus

ESA 4 - Head and Neck (30 decks)

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