Infratemporal Fossa and TMJ Flashcards by Courtney @Brainscape

Q

Infratemporal Fossa

What is it?

A

“Space” beneath the base of the skull - between the skull and the ramus of the mandible

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Q

Infratemporal Fossa Boundaries

Anterior

A

Posterior surface of the maxilla

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Q

Infratemporal Fossa Boundaries

Styloid process

A

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Q

Infratemporal Fossa Boundaries

Superior

A

Infratemporal surface of the greater wing of sphenoid

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Q

Infratemporal Fossa Boundaries

Medial

A

Lateral pterygoid plate

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Q

Infratemporal Fossa Boundaries

Lateral

A

Ramus of the mandible

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Q

Contents of the ITF (6)

A

Pterygoid muscles

Mandibular division of trigeminal and branches

Maxillary artery and branches

Pterygoid venous plexus

Chorda tympani

Otic ganglion

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Q

Mandibular division of Trigeminal Nerve

Anterior division

A

2x deep temporal, massenteric, nerve to lateral pterygoid and buccal (sensory)

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Q

Mandibular division of Trigeminal Nerve

Posterior division

A

Lingual (joined by chorda tympani), inferior alveolar, mylohyoid, auriculotemporal

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Q

Mandibular division of Trigeminal Nerve

Pre-division

A

Meningeal branch, nerve to medial pterygoid and communicating branch (tensor tympani and tensor vali palatini)

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Q

Maxillary Artery

Branches and route

A

Deep temporal, masseteric and pterygoid branches to muscles

Passes between 2 head s of lateral pterygoid to go into pterygomaxillary fissure - fossa and give off posterior superior alveolar branch

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Q

Facial Arteries

A

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Q

Pterygoid Venous Plexus

A

Surrounds lateral pterygoid.

Veins from orbit, nasal and oral cavities

Communicates with cavernous sinus and facial vein (areas supplied by maxillary artery)

Drained by maxillary vein

Route for infection

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Q

Chorda Tympani

A

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Q

Chorda Tympani and Lingual Nerve

A

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Q

Otic Ganglion

A

Q

TMJ - Tempromandibular Joint

What is it?

A

Synovial joint between head of mandible and mandibular fossa and articular tubercle on squamous part of temporal bone.

Articular surfaces are fibrocartilage.

Fibrous cartilage.

Nerve supply auriculotemporal and masseteric

Q

TMJ

Ligaments

A

Laterally, the temporomandibular ligament reinforces capsule, and Spehnomandibular and stylomandibular do so medially

Q

Jaw Movements

A

Q

Jaw Movements 2

A