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?
Pterygoid venous plexus
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)
Label teh following arteries as these are the main ones needed to be known for clinic.
What nerves are given LA in the lower arch to each teeth?
