Fossa Infratemporalis


The infratemporal fossa is an area on the skull localized below the temporal fossa and medial to the ramus mandibulae. The point which usually is missed is that the pterygopalatine fossa is the part of the infratemporal fossa extending in the deep of pterygomaxillary fissure. That leads to the conclusion that infratemporal fossa is directly bordered (temporal fossa & basis cranii externa) or connected via openings (basis cranii interna, orbit & nasal cavity) with all main topographical regions of the skull.

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Infratemporal fossa. Antero-lateral aspect Location of the infratemporal fossa in relation to the main bone structures of the skull
Location of the infratemporal fossa in relation to the main bony structures of the skull
The list of terms: Fossa infratemporalis – Infratemporal fossa
Fossa temporalis – Temporal fossa
Ramus mandibulae – Ramus of mandible
Lamina lateralis processus pterygoidei ossis sphenoidalis – Lateral pterygoid plate of the sphenoid bone

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Infratemporal fossa. Postero-inferior aspect Surfaces and connections of the infratemporal fossa
Location of the infratemporal fossa in relation to the main bony structures of the skull. Note that the mandible is the part of the fossa and forms its lateral wall.
The list of terms: Fossa infratemporalis – Infratemporal fossa
Ramus mandibulae – Ramus of mandible
Foramen mandibulare – Mandibular foramen
Arcus zygomaticus – Zygomatic arch
Facies infratemporalis alae majoris ossis sphenoidalis – Infratemporal surface of the greater wing of sphenoid bone
Facies infratemporalis maxillae – Infratemporal surface of maxilla
Lamina lateralis processus pterygoidei ossis sphenoidalis – Lateral pterygoid plate of the sphenoid bone
Fissura orbitalis inferior – Inferior orbital fissure

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Infratemporal fossa. Infero-lateral aspect Surfaces and connections of the infratemporal fossa
The image demonstrates an inferolateral aspect of the skull without mandible. The details of the medial and superior walls of the infratemporal fossa are exposed. That aspect shows all openings connecting fossa to other topographical regions of the skull: inferior orbital fissure leading to the orbit; oval, and spinous foramina connecting to the intracranial cavity; and sphenopalatine foramen opening into the nasal cavity. The latter is not observable directly, as it is in the deep of the pterygomaxillary fissure.
The list of terms: Fossa infratemporalis – Infratemporal fossa
Fossa temporalis – Temporal fossa
Crista infratemporalis – Infratemporal crest
Arcus zygomaticus – Zygomatic arch
Facies infratemporalis maxillae – Infratemporal surface of maxilla
Facies infratemporalis alae majoris ossis sphenoidalis – Infratemporal surface of the greater wing of sphenoid bone
Lamina lateralis – Lateral pterygoid plate
Tuberculum articulare – Articular tubercle
Fossa mandibularis – Mandibular fossa
Fissura orbitalis inferior – Inferior orbital fissure
Fissura pterygomaxillaris – Pterygomaxillary fissure
Foramen ovale – Oval opening
Foramen spinosum – Spinous opening
Fissura petrotympanica – Petrotympanic fissure
Foramina alveolaria – Alveolar foramina