Infratemporal Fossa

Question 1

Infratemporal Fossa
Boundaries

Answer 1

Anterior: Maxilla
Lateral: Temporal Bone, Tympanic Plate, Styloid Process, Mastoid process
Superior- Greater wing of Sphenoid
Inferior- where the medial pterygoid attaches the mandible near its angle
Lateral: Mandible(ramus)
Medial: Lateral pterygoid plate of sphenoid

Question 2

Infratemporal Fossa

Answer 2

Muscles: Inferior part of temporalis, Medial and lateral pterygoid
Maxillary arteries and its branches
Pterygoid venous plexus
Nerves: Inferior alveolar, buccal, lingual, mandibular, chorda tympani

Otic ganglion

Question 3

Muscles of mastication

Answer 3

Temporalis muscle
Medial and Lateral pterygoid
Masseter

Question 4

Muscles of Mastication:
Temporalis muscle
Attachments

Answer 4

Attachments:
Floor of temporal fossa
Deep surface of temporal fascia
Coronoid process
Anteromedial border of mandibles

Question 5

Muscles of Mastication:
Temporalis muscle
Actions

Answer 5

Elevates the mandible and closes the mouth
Posterior fibers:
Retract the mandible
Help in side to side grinding

Question 6

Muscles of Mastication:
Temporalis muscle
Innervation

Answer 6

Motor innervation: Anterior trunk of CN V3 Deep temporal branches