Infratemporal fossa

Question 1

Boundaries

Answer 1

Lateral pterygoid plate, ramus and coronoid process of mandible, infra temporal surface of greater wing of sphenoid, squamous part of temporal, posterior wall of maxilla, styloid process

Question 2

What muscles are found in ITF?

Answer 2

Lateral and medial pterygoid muscle

Question 3

What nerves in the ITF?

Answer 3

V3

Chorda tympani

Question 4

Where does V3 leave the skull?

Answer 4

Fo. ovale

Question 5

Where does chorda tympani leave the skull?

Answer 5

Facial canal of petrous temporal bone and enters middle ear

Question 6

What does chorda tympani innervate?

Answer 6

Taste to the anterior 2/3 of the tongue

Question 7

What artery and vein are found in the ITF?

Answer 7

Maxillary artery and vein

Question 8

What ganglion is found in the IFT?

Answer 8

Otic ganglion

Question 9

What are the contents of the ITF?

Answer 9

Lateral and medial pterygoid muscle.
V3
Chorda tympani
Otic ganglion
Maxillary artery
Maxillary vein

Question 10

Which muscle is deep?

Lateral or medial pterygoid muscle

Answer 10

Medial

Question 11

What are the 2 heads oft he medial pterygoid plate?

Answer 11

Deep and superficial head

Question 12

Describe the branching of V3 in ITF

Answer 12

Through fo. ovale and splits into anterior and poster division.
Anterior division gives long buccal nerve.
Posterior division gives lingual n, inferior alveolar n, n to mylohyoid, auriculotemporal n.

Question 13

What are the innervations of anterior division of V3?

Answer 13

Mostly motor except fro long buccal nerve which is sensory to the skin over buccinator and posterior mandibular teeth

Question 14

What are the innervation fo the posterior division of V3?

Answer 14

Mostly sensory except for nerve to mylohyoid which is motor to mylohyoid and anterior digastric.
Lingual nerve provides general sensory innervation to anterior 2/3 of tongue, mandibular buccal gingiva
Inferior alveolar nerve provides sensory innervation to the mandibular tooth substance and lingual gingiva.
Auriculotemporal nerve supplies to external ear, skin of the temple and temporomandibular joint

Question 15

What are the 2 parts of the lateral pterygoid muscle?

Answer 15

Superior and inferior head

Question 16

What are the 3 parts of the maxillary artery?

Answer 16

Relating to the lateral pterygoid muscle

Question 17

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

Answer 17

Inferior alveolar artery, middles meningeal artery, (deep auricular, anterior tympanic, accessory meningeal)

Question 18

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

Answer 18

Muscular and cutaneous branches

Question 19

Were is the 3rd part of the maxillary artery?

Answer 19

Pterygopalatine fossa

Question 20

What are the attachments of the medial pterygoid muscle?

Answer 20

To the lateral pterygoid plate and maxillary tuberosity superiorly.
Attached to the angle of the mandible inferiorly

Question 21

What are the attachments of the lateral pterygoid muscle?

Answer 21

To the lateral pterygoid plates and roof of infratemporal fossa (sphenoid).
Posteriorly to the capsule fo the temporomandiblar joint

Question 22

What is the function of the medial pterygoid muscle?

Answer 22

Elevates the mandible

Question 23

What is the function of the lateral pterygoid muscle?

Answer 23

Inferior head is a protractor, superior head is an elevator

Question 24

What is the maxillary artery a branch of?

Answer 24

Terminal branch of external carotid artery

Question 25

Where does middle meningeal artery enter the skull?

Answer 25

Fo. spinosum

Question 26

What are the tributaries of the maxillary vein?

Answer 26

Correspond to branches of the artery

Question 27

What does maxillary vein drain into?

Answer 27

Retromandibular vein