Infratemporal Fossa Flashcards
What are the components of the infratemporal fossa; Muscles, Nerves, Arteries, Veins.
1. Muscles
– Temporalis (inferior part)
- Medial pterygoid
- Lateral pterygoid
2. Nerves
- Branches of the mandibular nerve (CN V3)
- auriculotemporal, inferior alveolar, lingual and buccal
- Chorda tympani (CN VII)
- Otic Ganglion
3. Arteries
- Maxillary artery and its branches
4. Veins
- Pterygoid plexus
What is the function, origin, insertion and innervation of Lateral Pterygoid muscle?
Opens jaw
Origin - Infratemporal crest of greater wing of sphenoid (superior head) - Lateral surface of lateral pterygoid plate (inferior head)
Insertion - Mandibular (pterygoid) fovea - TMJ capsule and articular disc
Innervation - CN V3
What is the function, origin, insertion and innervation of Medial Pterygoid muscle?
Closes jaw
Origin - Medial surface of lateral pterygoid plate (deep head) - Tuberosity of maxilla (superficial head)
Insertion - Medial surface of mandibular ramus
Innervation - CN V3 (n. to medial pterygoid)
What is this area circled called and what are the veins labelled?
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Pterygoid venous plexus
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What are the 3 parts of the Maxillary artery and what are their branches?
1 st part
– Before lateral pterygoid
- Deep auricular
- Anterior tympanic
- Middle meningeal
- Accessory middle meningeal
- Inferior alveolar
2 nd
- Associated with lateral pterygoid
- Deep temporal
- Masseteric branches
- Pterygoid branches
- Buccal branch
3 rd
- After lateral pterygoid
- Sphenopalatine
- Descending palatine
- Posterior superior alveolar
- Infra-orbital
- Pharyngeal branches
- Vidian (a. of pterygoid canal)
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Label teh following arteries as these are the main ones needed to be known for clinic.
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What nerves are given LA in the lower arch to each teeth?
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