Lecture 13

Question 1

What is the Lateral boundary of the Infratemporal fossa?

Answer 1

Ramus of the mandible

Question 2

What is the Medial boundary of the Infratemporal fossa?

Answer 2

Lateral pterygoid plate

Question 3

What is the Anterior boundary of the Infratemporal fossa?

Answer 3

Posterior aspect of maxilla

Question 4

What are the Posterior boundaries of the Infratemporal fossa?

Answer 4

• TMJ
• Carotid sheath

Question 5

What is the Superior boundary of the Infratemporal fossa?

Answer 5

Inferior surface of the greater wing of the sphenoid bone

Question 6

What are the 2 foramina’s of the superior boundary of the Infratemporal fossa?

Answer 6

• Foramen ovale
• Foramen spinosum

Question 7

What is the Inferior boundary of the Infratemporal fossa?

Answer 7

Attachment of medial pterygoid to angle of the mandible

Question 8

List the Muscles of the Infratemporal fossa

Answer 8

• Inferior part of the temporalis muscle
• Lateral and medial pterygoid muscles

Question 9

List the Vasculature of the Infratemporal fossa

Answer 9

• Maxillary artery
• Pterygoid venous plexus
• Maxillary vein

Question 10

List the Nerves of the Infratemporal fossa

Answer 10

• Sensory Branches of the Mandibular Division
• Chorda tympani nerve
• Otic ganglion

Question 11

List the 4 major Sensory Branches of the Mandibular Division

Answer 11

1) Inferior alveolar nerve
2) Lingual nerve
3) Buccal nerve
4) Auriculotemporal nerve

Question 12

What is the Lateral pterygoid muscle attached to?

Answer 12

Lateral surface of the lateral pterygoid plate

Question 13

Where is the Insertion of the Lateral pterygoid muscle?

Answer 13

• Neck of mandible
• Capsule & disc of TMJ

Question 14

What is the action of the Lateral pterygoid muscle?

Answer 14

Protrudes and depresses chin

Question 15

What is the Medial pterygoid muscle attached to?

Answer 15

Medial surface of the lateral pterygoid plate

Question 16

Where is the Insertion of the Medial pterygoid muscle?

Answer 16

Medial surface of ramus of mandible

Question 17

What is the action of the Medial pterygoid muscle?

Answer 17

Elevates and protrudes mandible

Question 18

What does the Pterygoid venous plexus communicate with and by?

Answer 18

• Facial veins, Maxillary veins and Cavernous sinus
• By emissary veins passing through Foramen Ovale & Foramen Lacerum

Question 19

Where does the Maxillary artery arise from?

Answer 19

Within Parotid Gland

Question 20

List the important branches of the Maxillary artery

Answer 20

• Middle meningeal artery
• Inferior alveolar
• Deep temporal arteries
• Pterygoid arteries
• Masseteric artery
• Buccal artery

Question 21

What are the functions of the Anterior division of the Mandibular Nerve (V3)?

Answer 21

All motor except one

Motor branches to rest of the muscles of mastication
- Nerve to lateral pterygoid
- 2 deep temporal nerves
- Nerve to masseter

Question 22

Which nerve is sensory in the Anterior division of the Mandibular Nerve (V3)?

Answer 22

Buccal nerve

Question 23

What are the functions of the Posterior division of the Mandibular Nerve (V3)?

Answer 23

3 branches all sensory except one

Question 24

What is the Otic Ganglion?

Answer 24

Parasympathetic relay station

Question 25

Where is the Otic Ganglion?

Answer 25

- Inferior to foramen ovale - Medial to the mandibular nerve

Question 26

Where does the glossopharyngeal nerve come from in the Otic Ganglion?

Answer 26

Preganglionic parasympathetic fibres

Question 27

Where do the Postganglionic parasympathetic fibres enter through?

Answer 27

**Auriculotemporal nerve** to supply secretomotor innervation to parotid gland