Floor View Skull Dorsum Sellae

The dorsum sellae is part of the sphenoid bone in the skull.

Floor view skull dorsum sellae.

It serves as a cephalometric landmark. Posteriorly it articulates with the basilar part of the occipital bone and jointly forms the clivus. Erosion of anterior and posterior clinoids can be seen pituitary tumors e g. The sella turcica latinfor turkish seat is a saddle shaped depression in the body of the sphenoid boneof the human skulland of the skullsof other hominidsincluding chimpanzees orangutansand gorillas.

Enlargement with erosion of anterior cortex of dorsum sellae proceeds to the floor of the sella and may result in complete destruction of the dorsum. A pair of large bony processes that project laterally from the sphenoid bone and form the anterolateral floor of the cranium and the lateral walls of the skull. The towne view is an angled ap radiograph of the skull used to evaluate for fractures of the skull and neoplastic changes. The dorsum sellae forms the posterior wall of the sella turcica which houses the pituitary gland.

The dorsum sellae will be projected under the foramen magnum. This is a caudally angled occipito frontal projection that demonstrates the floor of sella turcica. Together with the basilar part of the occipital bone it forms the clivus. Together with the basilar part of the occipital bone it forms the clivus.

The dorsum sellae is part of the sphenoid bone in the skull. Laterally it articulates with the petrous apex of the petrous part of the temporal bone. In a properly positioned caldwell projection the ir is perpendicular to the orbitomeatal line oml and the x rays pass at an angle of 15 degrees from behind the head and exit at the nasion. The projection is used to visualize the petrous part of the pyramids the dorsum sellae and the posterior clinoid processes which are visible in the shadow of the foramen magnum.