Deep Face and Infratemporal Fossa Flashcards
The temporal region contains the ____ and ____ fossae
Temporal; infratemporal
The _____ fossa is the space found inferior to the zygomatic arch
The ____ fossa is the space found superior to the zygomatic arch
Infratemporal
Temporal
What 5 bones contribute to the temporal fossa?
Temporal bone Sphenoid bone Frontal bone Zygomatic bone Mandible
Boundaries of infratemporal fossa including:
Lateral Anterior Medial Roof Posterior Inferior
Lateral = ramus of mandible
Anterior = maxilla
Medial = lateral pterygoid plate
Roof = sphenoid
Posterior = tympanic plate and mastoid + styloid processes
Inferior = angle of mandible
What is the difference in function between the vertically oriented vs. horizontally oriented fibers of termporalis m?
Vertical fibers occlude the teeth (adduct/close the jaw)
Horizontal fibers pull the jaw posteriorly
What innervates the temporalis m.?
Trigeminal (V3)
The alveolar n. passes through the _____ foramen to supply the teeth
Mandibular
Contents of infratemporal fossa
Temporalis m. Lateral pterygoid m. Medial pterygoid m. Maxillary a. Pterygoid venous plexus
Nervous structures: inferior alveolar n. (V3) Lingual n. (V3) Buccal n. (V3) Chorda tympani (CN VII) Otic ganglion
When blood flow in the jaw is more static during periods of inactivity, yawning occurs using the _____ m., which contracts and expands, pushing on the _____ _____ and assisting with venous drainage
Lateral pterygoid; pterygoid plexus
What n. provides sensation to anterior 2/3 tongue?
Lingual n.
What branches are associated with the mandibular part of the maxillary a?
Deep auricular a. Anterior tympanic a. Inferior alveolar a. Middle meningeal a. Accessory meningeal a.
What does deep auricular a. supply?
External acoustic meatus
External TM
TMJ
What does anterior tympanic a. supply?
Internal TM
What foramen does inferior alveolar a. enter and what does it supply?
Enters mandibular foramen
Supplies mandible, mandibular teeth, chin, and mylohyoid m.
2 branches of inferior alveolar a.
Mylohyoid a.
Mental a.
What foramen does middle meningeal a. enter and what does it supply?
Enters cranium via foramen spinosum
Supplies dura mater of lateral wall, trigeminal ganglion, facial n., geniculate ganglion, tympanic cavity, tensor tympani m.
What foramen does accessory meningeal a. enter and what does it supply?
Enters cranium via foramen ovale
Supplies extracranial muscles of infratemporal fossa, otic ganglion, and sphenoid bone
4 branches of pterygoid part of maxillary a.
Deep temporal a.
Pterygoid branches
Masseteric a.
Buccal a.
What does the deep temporal a. supply
Temporalis m.
What do the pterygoid branches of maxillary a. supply?
Pterygoid m
What does masseteric a. supply?
TMJ
Masseter m.
What does buccal a. supply?
Buccal fat-pad
Buccinator m.
Buccal oral mucosa