SM_19b: Infratemporal Fossa Lab Tutorial

Question 1

Temporal fossa contains the _____

Answer 1

Temporal fossa contains the temporalis muscle

Question 2

Infratemporal fossa contains the ____, ____, and ____

Answer 2

Infratemporal fossa contains the mandibular nerve, maxillary artery, and pterygoid muscles

Question 3

Pterygopalatine fossa contains the ____, ____, and ____

Answer 3

Pterygopalatine fossa contains the maxillary nerve, pterygopalatine ganglion, and sphenopalatine artery

Question 4

Temporalis muscle inserts on the ____

Answer 4

Temporalis muscle inserts on the coronoid process

Question 5

Describe bony features of the infratemporal fossa

Answer 5

Bony features of the infratemporal fossa

• Palatine bone has horizontal and perpendicular plate
• Petrous part of temporal bone separates sphenoid from occipital
• Foramen ovale is where mandibular nerve exits
• Foramen spinosum is where middle meningeal artery exits

Question 6

____ is lateral wall of the oral cavity

Answer 6

Buccinator is lateral wall of the oral cavity

Question 7

____ is between the lateral and medial pterygoid muscles

Answer 7

Mandibular nerve is between the lateral and medial pterygoid muscles

Question 8

Flexion-extension at the TMJ involves ___

Answer 8

Flexion-extension at the TMJ involves thickening of the joint capsule medially and laterally to strengthen the ligaments

Question 9

Describe temporomandibular joint movements

Answer 9

Temporomandibular joint movements

• At rest: mandibular condyle is against the articular disk in the mandibular fossa
• Mouth open: the mandibular condyle and disk move forward onto the articular tubercle
• TMJ dislocation: condyles move anterior to the articular tubercle

Question 10

Infratemporal fossa contains four sensory mandibular nerve (V3) branches: ____, ____, ____, and ____

Answer 10

Infratemporal fossa contains four sensory mandibular nerve (V3) branches: auriculotemporal, buccal, inferior alveolar, and lingual

Question 11

Infratemporal fossa contains four motor mandibular nerve (V3) branches: ____, ____, ____, and ____

Answer 11

Infratemporal fossa contains four motor mandibular nerve (V3) branches: temporal, pterygoid, masseteric, and mylohyoid (from inferior alveolar)

Question 12

Infratemporal fossa contains four cutaneous mandibular nerve (V3) branches: ____, ____, ____, and ____

Answer 12

Infratemporal fossa contains four cutaneous mandibular nerve (V3) branches: auriculotemporal nerve, lingual, inferior alveolar nerve, and buccal nerve

Question 13

___ divides against the middle meningeal artery

Answer 13

Auriculotemporal nerve divides against the middle meningeal artery

(taste fibers come from facial nerve via chorda tympani, parasympathetics hop onto the lingual nerve via chorda tympani)

Question 14

____ can be mistaken for inferior alveolar nerve

Answer 14

Sphenomandibular ligament can be mistaken for inferior alveolar nerve

Question 15

Infratemporal fossa arteries include the ____, ____, ____, and ____

Answer 15

Infratemporal fossa arteries include the superficial temporal artery, middle meningeal artery, sphenopalatine artery, and maxillary artery

Question 16

Maxillary artery may be ____ or ____ to the lateral pterygoid muscle

Answer 16

Maxillary artery may be lateral or medial to the lateral pterygoid muscle

Question 17

Summarize the major structures / concepts of the infratemporal fossa

Answer 17

Infratemporal fossa