IT fossa

Question 1

Boundries of IT foss

Answer 1

• Roof-greater wing of sphenoid; temporal bone (foramen ovale and spinosum)
• posterior-styloid process; mastoid process (stylomastoid foramen CNVII)
• Lateral-ramus of mandible (madibular foramen
• anterior-maxilla
• medial wall-lateral pterygoid plate (pterygomaxillary fissure (gateway to PT fossa))

Question 2

Contents of IT fossa

Answer 2

• Maxillary a
• pterygoid venous plexus
• chorda tympani
• otic ganglion
• lateral and medial pterygoid muscles
• temporal muscle

Question 3

Branches of maxillary artery

Answer 3

-middle meningeal (through foramen spinosum, sphenoid bone, first part), inferior alveolar (first part), deep temporal (x2) (2nd part), branches to medial and lateral pterygoids (2nd part), descending palantine (3rd part, gr. palatine canal, gr palatine foramen) , infraorbital (3rd part, infraorbital foramen), posterior superior alvolar (alveolar canals, 3rd part), sphenopalatine (3rd part, sphenopalatine foramen)

Question 4

Branches of nerves in face

Answer 4

V3 (mandibular, passing in through foramen ovale): motor branch to temporalis and bucciator, auriculotemrporal n, inferior alvelar chorda tympani, mylohyoid, lingula, submandibular