Roof Of The Infratemporal Fossa

Contents of infratemporal fossa.

Roof of the infratemporal fossa.

Namely the lower part of the temporalis muscle the lateral pterygoid and the medial pterygoid. The infratemporal fossa is the space between the skull base lateral pharyngeal wall and the ramus of mandible. Medially sphenoid and palatine bones. Although controversy exists about the exact boundaries of the infratemporal fossa we define it as the area bounded anteriorly by the posterolateral aspect of the maxilla and the inferior orbital fissure fig.

The roof of the infratemporal fossa formed by the greater wing of the sphenoid bone provides an important passage for the neurovascular structures transmitted through the foramen ovale and spinosum. Mandibular nerve and its branches chorda tympani otic ganglion. The infratemporal fossa is bounded superiorly by the floor of the middle cranial fossa squamous temporal bone and greater wing of the sphenoid posteriorly by the cervical vertebrae laterally by the mandibular ramus and condyle and medially by the lateral pterygoid plate pterygopalatine fossa nasopharynx and adjacent clivus. Magnified view of left infratemporal fossa.

Medial surface of ramus of the mandible. Boundaries of the infratemporal fossa. Created by lateral surface of the lateral pterygoid plate of the sphenoid. The squamous portion of the temporal bone and the greater wing of the sphenoid form the roof of the infratemporal fossa while the medial.

Greater wing of the sphenoid. Its boundaries may be defined by. The borders or walls of the infratemporal fossa are formed by bone and soft tissue and they are as following. It s pierced by foramen spinosum and foramen ovale.

By teachmeseries ltd 2020. It s divided from the anterior wall by pterygomaxillary fissure. The zygomatic arch and anterior portion of the ramus of the mandible have been removed to expose the infratemporal fossa. The lateral pterygoid muscle has also been removed to show the foramen ovale and spinosum at the roof of this fossa for the mandibular nerve and middle meningeal artery respectively.

Among these are the mandibular branch of the trigeminal nerve and the middle meningeal artery. Superiorly greater wing of the sphenoid bone. The bounds of infratemporal fossa are. The infratemporal fossa is a space that exists below the temporal fossa.

Created by the temple surface of the higher wing of the sphenoid. Anteriorly by the infratemporal surface of the maxilla and the ridge which descends from its zygomatic pro. The contents of infratemporal fossa are. Lateral pterygoid plate of the sphenoid bone.

Posteriorly styloid and condylar processes. The infratemporal fossa is an irregularly shaped cavity situated below and medial to the zygomatic arch. The fossa is actually open to the neck posteroinferiorly and in doing so has no true anatomical floor. 1 st and 2 nd part of maxillary artery and its branches maxillary vein and pterygoid plexus of veins.

It is not fully enclosed by bone in all directions and it contains superficial muscles that are visible during dissection after removing skin and fascia. 1 3 6 9 the posterior boundary is formed by the tympanic and mastoid portions of the temporal bone. Lateral pterygoid medial pterygoid and tendon of temporalis.