Infratemporal Fossa Flashcards Preview

ESA 4 - Head and Neck > Infratemporal Fossa > Flashcards

Flashcards in Infratemporal Fossa Deck (25):
1

What is the infratemporal fossa?

An irregularly shaped space

2

Where is the infratemporal fossa found? 

  • Deep and inferior to the zygomatic arch
  • Deep to ramus of mandible

3

What are the borders of the infratemporal fossa? 

  • Superior
  • Anterior
  • Inferior
  • Medial
  • Lateral
  • Posterior

 

4

What is the superior border of the infratemporal fossa? 

Inferior greater wing of sphenoid

 

5

What is the anterior border of the infratemporal fossa? 

Posterior maxilla 

6

What is the inferior border of the infratemporal fossa? 

Medial pterygoid muscle attachment at the mandible 

7

What is the medial border of the infratemporal fossa? 

Lateral pterygoid plate of sphenoid

8

What is the posterior border of the infratemporal fossa? 

Temporal boen 

9

What is the lateral border of the infratemporal fossa? 

Ramus of mandible 

10

What is the contents of the infratemporal fossa? 

  • 3 muscles
  • Maxillary artery
  • Pterygoid venus plexus
  • Nerves

 

11

What muscles are in the infratemporal fossa? 

  • Inferior part of temporal muscle
  • Lateral and medial pterygoid muscles 

 

12

What does the pterygoid venous plexus communicate with? 

The cavernous sinus 

13

What nerves are in the infratemporal fossa? 

  • Mandibular branch of trigeminal 
  • Otic ganglion 

 

14

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

  • Inferior alveolar nerve
  • Lingual nerve
  • Buccal nerve

 

 

15

What does the inferior alveolar nerve innervate? 

The lower teeth 

16

How does the inferior alveolar nerve continue? 

As the mental nerve

17

What does the lingual nerve supply?

Sensory to the anterior 2/3 of the tongue

 

18

What does the lingual nerve carry? 

Chorda tympani fibres from the facial nerve

19

What do chorda tympani fibres supply?

Special sensory to anterior 2/3 of tongue 

20

What does the buccal nerve supply? 

Sensory to cheek and buccal gum 

21

What does the otic ganglion supply? 

Parasympathetics of parotid gland 

22

What is the clinical relevance of the infratemporal fossa? 

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

 

23

Who may get an infection in the infratemporal fossa? 

Diabetic patients 

24

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

Cavernous sinus thrombosis,

25

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

Due to venous communication with the pterygoid venous plexus