Structure F is the:

Structure F is the:

• A. Body of sphenoid
• B. Occipital bone
• C. Dorsum sellae
• D. Sella turcica

Answer: (C)

The structure is the dorsum sellae, which forms the posterior boundary of the sella turcica in the sphenoid bone. The sella turcica is the saddle-shaped depression that houses the pituitary gland, with the tuberculum sellae as its front edge and the dorsum sellae as its back edge. Since Structure F sits at the rear edge of this saddle, it identifies the dorsum sellae. The body of the sphenoid is the broader bone around this area, while the occipital bone is behind the sphenoid region, not part of the sella boundary.

The structure is the dorsum sellae, which forms the posterior boundary of the sella turcica in the sphenoid bone. The sella turcica is the saddle-shaped depression that houses the pituitary gland, with the tuberculum sellae as its front edge and the dorsum sellae as its back edge. Since Structure F sits at the rear edge of this saddle, it identifies the dorsum sellae. The body of the sphenoid is the broader bone around this area, while the occipital bone is behind the sphenoid region, not part of the sella boundary.