Greater And Lesser Wing Of Sphenoid Ct

Lateral sphenoid sphenoid triangle and greater wing the lateral part of the greater wing of the sphenoid is simply bone with a dural covering. In some animals they remain as separate bones called orbitosphenoids.

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The sphenoid bone forms the central skull base and viewed anteriorly resembles a bird with its wings unfurled.

Greater and lesser wing of sphenoid ct. Elevation of lesser wing of sphenoid and associated dysplasia giving bare orbit appearance. Formed by lesser wing of sphenoid. The greater wing of the sphenoid features superior lateral and orbital surfaces.

An extracranial surface deep to the temporalis muscle. Superior orbital fissure lies between the lesser and the greater wing of sphenoid. They conduct the maxillary nerve mandibular nerve and middle meningeal vessels respectively.

At the ventral junction of the body and wings the paired pterygoid processes arise inferiorly resembling the extended limbs of a bird. The posterior part of each projects as a triangular process that fits into the angle between the squamous and the petrous part of the temporal bone and presents at its apex a downward directed process the spine of sphenoid bone. Greater wing of sphenoid and zygomatic thickest part of orbit.

Start studying orbital bones and ct. Transmits the middle meningeal artery and meningeal branch of the mandibular nerve. This fissure allows the passage to the nerves iii iv vi branches of the v 1 and ophthalmic veins.

The superior surface is flattened and is in contact with the frontal lobe of the brain. Also see widening of the optic canal. And an intracranial surface anterior boundary of the middle cranial fossa.

Learn vocabulary terms and more with flashcards games and other study tools. The lesser wing of the sphenoid bone or orbito sphenoid is a sharp pointed triangular plate arising laterally from the upper anterior portion of the sphenoid body. The lesser wing arises from the anterior aspect of the sphenoid body in a superolateral direction.

It separates the anterior cranial fossa from the middle cranial fossa. The greater wings of the sphenoid are two strong processes of bone which arise from the sides of the body and are curved upward laterally and backward. The lesser wing features both superior and inferior surfaces.

Transmits the maxillary branch of the trigeminal nerve. There are three foramina present in the greater wing the foramen rotundum foramen ovale and foramen spinosum. Need mri to assess for associated optic glioma.

The inferior surface forms the upper border of the superior. Transmits the mandibular division of the trigeminal nerve accessory meningeal artery and occasionally the lesser petrosal nerve. It is a compound bone with a median body and paired lateral greater and lesser wings fig.

The superior surface features. This area is seen as a triangle in axial plane with an orbital surface. Inferior orbital fissure lies between the greater wing of sphenoid the orbital process of the maxillary bone and laterally the zygomatic bone.

Where optic nerve passes through. The lesser wings of the sphenoid or orbito sphenoids are two thin triangular plates which arise from the upper and anterior parts of the body and projecting lateralward end in sharp points fig.

Coronal Plane A Lateral Extension To Greater Wing Arrow B