What are the boundaries of the infratemporal fossa?

What are the boundaries of the infratemporal fossa?

The boundaries of the infratemporal fossa occur:

  • anteriorly, by the infratemporal surface of the maxilla, and the ridge which descends from its zygomatic process.
  • posteriorly, by the tympanic part of the temporal bone, and the spina angularis of the sphenoid.

Where is the infratemporal fossa located?

The infratemporal fossa is a complex space of the face that lies posterolateral to the maxillary sinus and many important nerves and vessels traverse it. It lies below the skull base, between the pharyngeal sidewall and ramus of the mandible.

What is the posterior boundary of the infratemporal fossa?

The maxilla forms the anterior border of the cavity, and the styloid and condylar processes form the posterior border. Medially, the sphenoid and the palatine bones form a vertical bony rest, and laterally, the ramus and the coronoid process cover the opening of the fossa.

What is the Infratemporal region?

Infratemporal fossa. This is a space lying beneath the base of the skull between the side wall of the pharynx and the ramus of the mandible. It is also referred to as the parapharyngeal or lateral pharyngeal space.

Which nerve passes through the infratemporal fossa?

mandibular nerve
The mandibular nerve enters the infratemporal fossa and passes through the foramen ovale in the sphenoid bone, and divides at that point into a smaller anterior and a larger posterior trunk.

What are the boundaries of pterygopalatine fossa?

The boundaries of the pterygopalatine fossa are the:

  • pterygomaxillary fissure (lateral)
  • perpendicular plate of palatine bone (medial)
  • pterygoid plates (posterior)
  • maxilla (anterior)
  • greater wing of sphenoid (superior)

What is Pterygomaxillary fossa?

The pterygomaxillary fossa is found posterior to the maxillary sinus and inferior to the sphenoid bone and orbital process of the palatine bone. It is lateral to the perpendicular plate of the palatal bone and anterior to the base of the pterygoid process and to the anterior surface of the greater wing of the sphenoid.

What muscles are in the infratemporal fossa?


  • medial and lateral pterygoid muscles.
  • temporalis muscle.
  • maxillary artery and branches.
  • pterygoid venous plexus.
  • mandibular nerve and its branches (including lingual nerve)
  • chorda tympani nerve.
  • posterior superior alveolar nerve of maxillary nerve.

What structure is the anterior wall of pterygopalatine fossa?

The anterior wall is formed by the posterior surface of the maxilla. The medial wall is formed by the lateral surface of the palatine. The roof and the posterior wall are formed by the sphenoid, specifically the anterosuperior surface of its pterygoid process.

How is the retromandibular fossa performed in cadaver heads and necks?

Methods: The retromandibular fossa approach was performed in four arterial and venous latex-injected cadaveric heads and necks (eight sides) via preauricular and postauricular incisions.

What is the fossa of the temporal bone?

The fossa is closely associated with both the pterygopalatine fossa, via the pterygomaxillary fissure, and also communicates with the temporal fossa, which lies superiorly (figure 1.0). The boundaries of this complex structure consists of both bone and muscle:

What is the lateral border of the infratemporal fossa?

Clinical Relevance: Surface Anatomy of the Infratemporal Fossa. The lateral border of the fossa is actually quite deep – the ramus of the mandible – meaning we’re on the inside face of the jawbone. To get to the medial border, we go even deeper, to the lateral edge of the sphenoid bone, in an area called the lateral pterygoid plate.

What is the retromandibular fossa approach to the high cervical internal carotid artery?

Retromandibular fossa approach to the high cervical internal carotid artery: an anatomic study The entire cervical ICA can be exposed via the retromandibular fossa approach without neural and vascular injury by use of meticulous dissection and good anatomic knowledge.