Floor View Skull Dorsum Sellae

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. Erosion of anterior and posterior clinoids can be seen pituitary tumors e g.

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Floor view skull dorsum sellae.

The dorsum sellae will be projected under the foramen magnum. The dorsum sellae forms the posterior wall of the sella turcica which houses the pituitary gland. Under angulation over angulation shifting of the anterior or posterior clinoid within the foramen indicate what towne. Together with the basilar part of the occipital bone it forms the clivus.

It serves as a cephalometric landmark. 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. 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. Posteriorly it articulates with the basilar part of the occipital bone and jointly forms the clivus.

Laterally it articulates with the petrous apex of the petrous part of the temporal bone. This is a caudally angled occipito frontal projection that demonstrates the floor of sella turcica. 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 is part of the sphenoid bone in the skull.

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. 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. 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. What structure should be projected within the shadow of the foramen magnum on a well positioned ap axial towne projection of the skull dorsum sellae what is the name of the structure that houses the pituitary gland.