cavernous sinus
Noun: A cavernous sinus is one of a pair of large, irregularly shaped venous channels located on either side of the body of the sphenoid bone in the middle cranial fossa. It is a major dural venous sinus that drains blood from the brain and orbits back toward the heart.
The term is used exclusively in anatomical and medical contexts to describe this specific structure. * The cavernous sinus is a critical structure due to the important nerves and the internal carotid artery that pass through it. * Infection from the face can potentially spread to the cavernous sinus, causing a serious condition called cavernous sinus thrombosis. * The surgeon carefully avoided the cavernous sinus during the procedure.
- Cavernous sinus syndrome: A clinical condition resulting from pathology affecting the cavernous sinus, characterized by a combination of symptoms like ophthalmoplegia (eye movement paralysis), facial sensory loss, and Horner's syndrome.
- Sinus cavernosus: The Latin equivalent term used in anatomical nomenclature.
- Dural venous sinus: The general category of venous channels to which the cavernous sinus belongs.
- There are no direct common synonyms. In technical anatomical writing, it may be referred to descriptively as a "paired dural venous sinus in the middle cranial fossa."
The word "cavernous" alone means resembling a large cave, spacious and hollow. However, in the fixed anatomical term cavernous sinus, it specifically describes the sinus's spongy, trabeculated internal structure, not its size. The term has no other meanings as a combined unit.
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either of a pair of large venous sinuses in the cranial cavity
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