Diaphragma sellae

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Diaphragma sellae
Tentorium cerebelli seen from above. (Diaphragma sellae labeled at upper left.)
Latin Diaphragma sellae
Gray's p.814

The diaphragma sellae or sellar diaphragm is the circular fold of dura mater that almost completely roofs the fossa hypophyseos of the sella turcica of the sphenoid bone within the skull. It retains the pituitary gland in the fossa hypophyseos, with only the infundibulum of the pituitary gland passing through it. The sensory innervation of the diaphragma sellae is by the first division of the trigeminal nerve.

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This article incorporates text from a public domain edition of Gray's Anatomy.