- Infratemporal fossa
Name = PAGENAME
Latin = fossa infratemporalis
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GrayPage = 184
Caption = Left infratemporal fossa.
DorlandsPre = f_14
DorlandsSuf = 12376096
The infratemporal fossa is an irregularly shaped cavity, situated below and medial to the
It is bounded by the following structures:
* "anteriorly", by the
infratemporal surfaceof the maxillaand the ridge which descends from its zygomatic process
* "posteriorly", by the
articular tubercleof the temporal and the spinal angularisof the sphenoid
* "superiorly", by the
greater wing of the sphenoidbelow the infratemporal crest, and by the under surface of the temporal squama
* "inferiorly", by the
alveolar border of the maxilla
* "medially", by the
lateral pterygoid plate
* "laterally", by the
ramus of mandible
it has no floor
Contents of the infratemporal fossa
* the lower part of the
Pterygoideiinternus and externus (internal and external pterygoid muscle)
The internal maxillary vessles, consisting of the
maxillary arteryoriginating from the external carotid arteryand its branches.
Internal maxillary branches found within the infratemporal fossa including the
middle meningeal artery
inferior alveolar artery
deep temporal artery
* pterygoid venous plexus
Mandibular nerve, inferior alveolar nerve, lingual nerve, buccal nerve, chorda tympani nerve, and otic ganglion. [Moore, Keith L & Dalley, Arthur (2006). Clinically oriented anatomy (5th ed.), Lippincott Williams & Wilkins.]
Mandibular nervewhich is the third branch of the trigeminal nerve (CN V3), also known as the "inferior maxillary nerve" or "nervus mandibularis", enters infratemporal fossa from middle cranial fossathrough foramen ovale.
deep temporal nerve
lateral pterygoid nerveand medial pterygoid nerve
inferior alveolar nerve
Its motor fibers innervate all the muscles of mastication plus the mylohyoid, anterior belly of the digastric, and the tensores veli palati and tympani
external acoustic meatus
* skin overlying the
mandible(except at the angle of the mandible)
anterior 2/3 of tongue
floor of mouth
foramen ovaleand foramen spinosumopen on its roof, and the alveolar canalson its anterior wall.
At its upper and medial part are two fissures, which together form a T-shaped fissure, the horizontal limb being named the
inferior orbital, and the vertical one the pterygomaxillary.
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