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The middle clinoid process is a small, bilaterally paired elevation on either side of the tuberculum sellae, at the anterior boundary of the sella turcica. A (larger) anterior clinoid process is situated lateral to each middle clinoid process.[1]: 509 The diaphragma sellae (i.e. the dura forming the roof of the cavernous sinus)[1]: 443 and the dura of the floor of the hypophyseal fossa (sella turcica)[1]: 441 attach onto the middle clinoid processes.
On each side of the body, the internal carotid artery passes between the anterior and middle clinoid processes.[1]: 509
Etymology
Clinoid likely comes from the Greek root klinein or the Latin clinare, both meaning "sloped" as in "inclined."
References
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