Infratemporal Fossa

Question 1

What is the medial boundary of the ITS?

Answer 1

Lateral pterygoid plate

Question 2

What is the anterior boundary of the ITS?

Answer 2

Posterior maxilla

Question 3

What is the posterior boundary of the ITS?

Answer 3

tympanic plate and mastoid process

Question 4

What is the superior boundary of the ITS?

Answer 4

Zygomatic arch

Question 5

What is the lateral border of the ITS?

Answer 5

Border of the mandible

Question 6

What muscles does the ITS contain?

Answer 6

• temporalis
• medial pterygoid
• lateral pterygoid

Question 7

What nerves does the ITS contain?

Answer 7

• branches of CN V3
• chorda tympani (CN VII)
• otic ganglion (CN IV)

Question 8

What arteries does the ITS contain?

Answer 8

maxillary artery and its branches

Question 9

What veins does the ITS contain?

Answer 9

pterygoid plexus

Question 10

What is the function of the lateral pterygoid muscle?

Answer 10

opens jaw

Question 11

What innervates the lateral pterygoid muscle?

Answer 11

CN V3 (n. to lateral pterygoid)

Question 12

What is the function of the medial pterygoid?

Answer 12

closes jaw

Question 13

What innervates the medial pterygoid muscle?

Answer 13

CN V3 (n. to medial pterygoid)

Question 14

What is the clinical relevance of the pterygoid venous plexus?

Answer 14

Communication between superficial face and dural venous sinuses.

Question 15

How are the 3 segments of the maxillary artery differentiated?

Answer 15

Position in relation the lateral pterygoid muscle

Question 16

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

Answer 16

• middle meningeal artery
• IAA

Question 17

What are the branches of the 2nd part of the maxillary artery?

Answer 17

• deep temporal arteries
• buccal artery

Question 18

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

Answer 18

• sphenopalatine artery
• infra-orbital artery
• posterior superior alveolar artery

Question 19

What divisions does the mandibular nerve split into?

Answer 19

anterior and posterior

Question 20

What are 3 branches of the anterior division of the mandibular nerve?

Answer 20

• deep temporal
• buccal
• muscular branches

Question 21

What are the branches of the posterior division of the mandibular nerve?

Answer 21

• auriculotemporal
• IAN
• lingual

Question 22

What are the 2 branches of the IAN?

Answer 22

• nerve to mylohyoid
• mental

Question 23

What does the lingual nerve supply?

Answer 23

• anterior 2/3rds of the tongue
• floor of the mouth
• mandibular lingual gingivae

Question 24

What does the mental nerve supply?

Answer 24

• chin
• lower lip mucosa
• gingivae of lower 3-3

Question 25

What does the IAN supply?

Answer 25

• lower dental arch
• mandibular labial gingivae

Question 26

What nerve does the otic ganglion derive from?

Answer 26

Glossopharyngeal CN IX

Question 27

Where is the otic ganglion?

Answer 27

On CN V3

Question 28

What is the chorda tympani a chord of?

Answer 28

Trigeminal nerve (CN VII)

Question 29

At what foramen does the chorda tympani branch?

Answer 29

at the stylomastoid foramen

Question 30

What nerve does the chorda tympani connect with?

Answer 30

Lingual branch of CNV3

Question 31

What does the chorda tympani innervate?

Answer 31

special sense of taste from anterior 2/3 tongue and palate through CN VII