Infratemporal Fossa Flashcards
What is the infratemporal fossa
A space beneath the base of the skull, between the skull and the ramus of the mandible
What is the anterior boundary of the ITF
Posterior surface of the maxilla
Posterior border of ITF
Styloid process
Superior border of ITF
Infratemporal surface of the greter wing of the sphenoid
Medial boundary of ITF
Lateral pterygoid plater
Lateral boundary of ITF
Ramus of the mandible
What is within the ITF
Lat and med pterygoids Mandibular division of trigeminal and branches Maxillary artery and branches Pterygoid venous plexus Chorda tympani Otic ganglion
Movements of the pterygoids
Med - assists in elevating the mandible
Lat - pulls the neck of the mandible forward
Both - chewing movements
What innervates the pterygoids
Mandibular division of CN V
Anterior divisions of mandibular division of trigeminal
2 deep temporal
Masseteric
Nerve to lateral pterygoid
Buccal
Which of the anterior nerves are sensory
Buccal
Posterior divisions of the mandibular division of the trigeminal
Lingual
Inferior alveolar
Mylohyoid
Auriculotemporal
What nerve is joined by the chorda tympani
Lingual
What are the pre-divisions of the mandibular division of the trigeminal
Meningeal
Nerve to medial pterygoid
Tensor tympani and tensor veli palatini
What are the muscular branches of the maxillary artery
Deep temporal
Masseteric
Pterygoid
Where does the maxillary artery pass between
The two heads of the lateral pterygoid to go into the pterygomaxillary fissure
What branches does the maxillary give off after leaving the fossa
Posterior superior alveolar branch
What are the three parts of the maxillary artery
Mandibular, pterygoid and pterygopalatine
What are the pterygopalatine branches
Posterior superior alveolar
Infraorbital
Anterior superior alveolar branches
What does the pterygoid venous plexus surround
The lateral pterygoid
What vein contribute to the pterygoid venous plexus
Orbit, nasal and oral cavities
What does the pterygoid venous plexus communicate with
Cavernous sinus and facial vein
What drains the pterygoid venous plexus
Maxillary vein
What type of joint if the TMJ
Synovial joint
Where is the TMJ
Between the head of the mandible and mandibular fossa and the articular tubercle on the squamous part of the temporal bone
What covers the articualr surfaces of the TMJ
Fibrocartilage
What type of capsule does the TMJ have
Fibrous
What nerves supply the TMJ
Auriculotemporal and masseteric
What reinforces the TMJ capsule
The lateral temporomandibulad ligament
What supports the TMJ medially
Sphenomandibular and stylomandibular ligaments
What does the lateral pterygoid attach to
Articular disc and capsule
What is the cavity divided by
Fibrous articular disc
What is the function of the disc
Increases congruity of articular surfaces
What movement does the head of the mandible and the disc give
Elevation and depression
What movement does the
Lol
What happens to close the mouth
Elevation and retraction pull the condyle backwards
What happens to open the mouth
Both sides depress…
