Infratemporal & TMJ Flashcards
What foramen opens up into infra temporal fossa?
Foramen ovale
What are the boundaries of the infratemporal fossa?
Anterior - Maxzilla
Posterior - styloid process
Superior - Infratemporal surface of sphenoid
Medial - Lateral pterygoid
Lateral - Ramus of mandible
What structures pass through the pterygomaxillary fissure?
terminal branches of maxillary
List the contents of the infra temporal fossa
Lateral/medial pterygoid CNV3 Maxillary artery Chorda tympani Otic ganglion Pterygoid venous plexus
Which muscle covers most of maxillary artery until it is resected?
Lateral pterygoid
Name the 3 main parts of the maxillary artery
Mandibular
Pterygoid
Pterygopalatine
What drains the pterygoid venous plexus?
Maxillary vein
When does the facial nerve form chords tympani?
As it passes through temporal bone
What structure does chords tympani pass over?
Malleus
What type of joint is the TMJ
Modified synovial joint
Describe the movements at TMJ
Hinge at head of mandible/disc
Head of mandible can be pulled anteriorly by lat pterygoid to allow mouth to open wider
Disc allows gliding movements
What are the articular surfaces of articular disc of TMJ
Fibrocartilage
What is the innervation of of the TMJ?
Auriculotemporal and masseteric
Which ligaments support the TMJ capsule?
Lateral TM lig
Sphenomandibular
Stylomandibular
What parts of the disc allow which movements?
Head of mandible and disc = elevation and depression
Disc and mandibular fossa = protrusion and retraction
Mouth open: depression and protrusion
Mouth close: elevation and retraction
