Search results
Results from the WOW.Com Content Network
The sella turcica is located in the sphenoid bone behind the chiasmatic groove and the tuberculum sellae.It belongs to the middle cranial fossa. [1]The sella turcica's most inferior portion is known as the hypophyseal fossa (the "seat of the saddle"), and contains the pituitary gland (hypophysis).
The posterior clinoid processes are the tubercles of the sphenoid bone situated at the superior angles of the dorsum sellae (one on each angle) which represents the posterior boundary of the sella turcica. They vary considerably in size and form.
The tuberculum sellae (or the tubercle of the sella turcica) is a slight [1] median elevation upon the superior aspect of the body of sphenoid bone (that forms the floor of the middle cranial fossa [2]: 508-509 ) at the anterior boundary of the sella turcica (hypophyseal (pituitary) fossa) [2]: 509 and posterior boundary of the chiasmatic groove.
The sella turcica is bounded posteriorly by a quadrilateral plate of bone, the dorsum sellae, the upper angles of which are surmounted by the posterior clinoid processes: these afford attachment to the cerebellar tentorium, and below each is a notch for the abducent nerve.
Figure 4 : Sphenoid bone at birth, posterior aspect. Until the seventh or eighth month of fetal development , the body of the sphenoid consists of two parts: one in front of the tuberculum sellae , the presphenoid, with which the small wings are continuous; the other, consisting of the sella turcica and dorsum sellae , the postsphenoid, with ...
The posterior clinoid processes deepen the sella turcica, and give attachment to the tentorium cerebelli. On either side of the dorsum sellae is a notch for the passage of the abducent nerve , and below the notch a sharp process, the petrosal process, which articulates with the apex of the petrous portion of the temporal bone , and forms the ...
Base of skull - sella turcica. The anterior, middle and posterior cranial fossa in different colors ... Mobile view ...
It sits in a protective bony enclosure called the sella turcica, covered by the dural fold diaphragma sellae. [4] The pituitary gland is composed of the anterior pituitary, the posterior pituitary, and an intermediate lobe that joins them. [5] The intermediate lobe is avascular and almost absent in humans. In many animals, these three lobes are ...