What does the dorsum sella do?
What does the dorsum sella do?
Gross anatomy The dorsum sellae forms the posterior wall of the sella turcica, which houses the pituitary gland. Laterally, it articulates with the petrous apex of the petrous part of the temporal bone. Posteriorly, it articulates with the basilar part of the occipital bone, and jointly forms the clivus.
What is the function of sphenoid bone?
Structure and Function Sphenoid bone has many essential functions. It helps form the base and lateral sides of the skull in combination with the orbital floor. Its many articulations with other bones give the skull rigidity. It is an attachment site for many of the muscles of mastication.
What is the significance of the sella turcica?
During embryological development, the sella turcica area is the key point for the migration of the neural crest cells to the frontonasal and maxillary developmental fields. The neural crest cells are involved in the formation and development of sella turcica and teeth.
What are the main features of the sphenoid bone?
The sphenoid bone is said to be ‘butterfly-shaped’. It consists of a body, paired greater wings and lesser wings, and two pterygoid processes….It contributes to three parts of the facial skeleton:
- Floor of the middle cranial fossa.
- Lateral wall of the skull.
- Posterolateral wall of the orbit.
What attaches to the dorsum Sellae?
What is the function of occipital condyles?
The occipital condyles are paired kidney-shaped structures that form the base of the occipital bone and are the structural bases for the articulation of the skull with the cervical spine.
What’s the difference between sella turcica and hypophyseal fossa?
The sella turcica is a saddle-shaped depression in the midline of the sphenoid sinus at the skull base and is the caudal aspect of the hypophyseal fossa, which contains the pituitary gland. The degree of pneumatization of the sphenoid sinus can vary.
What is the most posterior aspect of the dorsum Sellae?
The dorsum sellae is part of the sphenoid bone in the skull. Together with the basilar part of the occipital bone it forms the clivus….
| Dorsum sellae | |
|---|---|
| FMA | 54718 |
| Anatomical terms of bone |
What is the function of the dorsum sellae?
The dorsum sellae is the square shaped process of the sphenoid bone. It ascends superiorly from the posterior part of the sphenoid body to form the posterior wall of the sella turcica. The dorsum sellae forms the posterior wall of the sella turcica, which houses the pituitary gland.
What bone does the dorsum sellae articulate with?
It ascends superiorly from the posterior part of the sphenoid body to form the posterior wall of the sella turcica. The dorsum sellae forms the posterior wall of the sella turcica, which houses the pituitary gland. Laterally, it articulates with the petrous apex of the petrous part of the temporal bone.
What is the back of the sella turcica?
The back of the sella turcica is a bony ridge called the dorsum sellae, and it resembles the high-backed rear support of historical Turkish and Arabic saddles. Located on the sloping backside of the dorsum sellae is a shallow depression called the clivus, which supports the upper portion of the brain stem structure known as the pons.
Where is the sellar region of the brain located?
The sellar region is centered around the adenohy- pophysis, which is described in the literature as isointense both to the pons on sagittal T1- weighted images and to the white matter of the temporal lobes on coronal T1-weighted images (2,7,9).
