The diaphragma sellae forms the roof of the sella turcica and is pierced by the pituitary stalk. Which dural structure gives rise to the diaphragma sellae?
- A Falx cerebri
- B Falx cerebelli
- C Tentorium cerebelli ✓
- D Inferior sagittal sinus fold
Correct answer: C. Tentorium cerebelli
Explanation
The diaphragma sellae is a small horizontal dural fold arising from the tentorium cerebelli, roofing the hypophyseal fossa and pierced by the infundibulum. The falx cerebri separates the cerebral hemispheres and does not contribute to the sellar roof. This is relevant during transsphenoidal surgery where the diaphragma must be breached to access the pituitary gland.
Reference: Gray's Anatomy, 42nd ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
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