Which structure forms the posterior boundary of the sella turcica?

Which structure forms the posterior boundary of the sella turcica?

• A. Tuberculum sellae
• B. Hypophyseal fossa
• C. Dorsum sellae
• D. Anterior clinoid process

Answer: (C)

The posterior boundary of the sella turcica is formed by the dorsum sellae. The sella turcica is a saddle-shaped depression in the sphenoid bone that houses the pituitary gland, with the front rim provided by the tuberculum sellae and the back wall by the dorsum sellae. The dorsum sellae also gives rise to the posterior clinoid processes, marking the rear edge of the sella. This arrangement helps orient nearby structures, such as the optic chiasm above the tuberculum sellae and the pituitary stalk emerging behind the dorsum sellae.

The posterior boundary of the sella turcica is formed by the dorsum sellae. The sella turcica is a saddle-shaped depression in the sphenoid bone that houses the pituitary gland, with the front rim provided by the tuberculum sellae and the back wall by the dorsum sellae. The dorsum sellae also gives rise to the posterior clinoid processes, marking the rear edge of the sella. This arrangement helps orient nearby structures, such as the optic chiasm above the tuberculum sellae and the pituitary stalk emerging behind the dorsum sellae.