Cavernous sinus
A large channel of venous blood creating a "sinus" cavity bordered by the sphenoid bone and the temporal bone of the skull. The cavernous sinus is an important structure because of its location and its contents which include the third cranial (oculomotor) nerve, the fourth cranial (trochlear) nerve, parts 1 (the ophthalmic nerve) and 2 (the maxillary nerve) of the fifth cranial (trigeminal) nerve, and the sixth cranial (abducens) nerve. A cavernous sinus thrombosis is a blood clot within the cavernous sinus. This clot causes the cavernous sinus syndrome. The cavernous sinus syndrome is characterized by edema (swelling) of the eyelids and the conjunctivae of the eyes and paralysis of the cranial nerves which course through the cavernous sinus. The orbital cavity is drained by paired veins called the superior and inferior ophthalmic veins. The superior ophthalmic vein arises at the inner angle of orbit and follows the course of ophthalmic artery into the cavernous sinus, a greatly dilated (widened) channel of venous blood. The inferior ophthalmic vein arises from a venous network at the forepart of orbit and divides into two branches one of which also ends in the cavernous sinus.

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cavernous sinus n either of a pair of large venous sinuses situated in a groove at the side of the body of the sphenoid bone in the cranial cavity and opening behind into the petrosal sinuses

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one of the paired cavities within the sphenoid bone, at the base of the skull behind the eye sockets, into which blood drains from the brain, eye, nose, and upper cheek before leaving the skull through connections with the internal jugular and facial veins. Through the sinus, in its walls, pass the internal carotid artery and the abducens, oculomotor, trochlear, ophthalmic, and maxillary nerves.

Medical dictionary. 2011.

Look at other dictionaries:

  • Cavernous sinus — ] Venous connectionsIt receives tributaries from: *Superior and inferior ophthalmic veins *Sphenoparietal sinus *Superficial middle cerebral veinsThe veins of exit are to the superior and inferior petrosal sinuses as well as via the emissary… …   Wikipedia

  • cavernous sinus — noun either of a pair of large venous sinuses in the cranial cavity • Syn: ↑sinus cavernosus • Hypernyms: ↑venous sinus, ↑sinus * * * noun : either of a pair of large venous sinuses situated in a groove at the side of the body of the sphenoid… …   Useful english dictionary

  • cavernous sinus — one of the paired cavities within the sphenoid bone, at the base of the skull behind the eye sockets, into which blood drains from the brain, eye, nose, and upper cheek before leaving the skull through connections with the internal jugular and… …   The new mediacal dictionary

  • Cavernous sinus thrombosis — Infobox Disease Name = PAGENAME Caption = Oblique section through the cavernous sinus. DiseasesDB = 2184 ICD10 = ICD9 = ICD9|325 ICDO = OMIM = MedlinePlus = eMedicineSubj = emerg eMedicineTopic = 87 eMedicine mult = eMedicine2|neuro|572 MeshID =… …   Wikipedia

  • Cavernous sinus syndrome — A cavernous sinus thrombosis is a blood clot within the cavernous sinus, a large channel of venous blood in a cavity bordered by the sphenoid bone and the temporal bone of the skull. The cavernous sinus is an important structure because of its… …   Medical dictionary

  • Cavernous sinus thrombosis — A cavernous sinus thrombosis is a blood clot within the cavernous sinus, a large channel of venous blood in a cavity bordered by the sphenoid bone and the temporal bone of the skull. The cavernous sinus is an important structure because of its… …   Medical dictionary

  • Syndrome, cavernous sinus — A cavernous sinus thrombosis is a blood clot within the cavernous sinus, a large channel of venous blood in a cavity bordered by the sphenoid bone and the temporal bone of the skull. The cavernous sinus is an important structure because of its… …   Medical dictionary

  • Thrombosis, cavernous sinus — A cavernous sinus thrombosis is a blood clot within the cavernous sinus, a large channel of venous blood in a cavity bordered by the sphenoid bone and the temporal bone of the skull. The cavernous sinus is an important structure because of its… …   Medical dictionary

  • Синус Пещеристый (Cavernous Sinus) — парный канал, расположенный по бокам от турецкого седла, в который поступает венозная кровь от головного мозга, глаза, носа и из верхней части щеки; отток крови осуществляется через внутреннюю яремную и лицевую вены. Через пещеристый синус… …   Медицинские термины

  • Sinus, cavernous — A large channel of venous blood creating a sinus cavity bordered by the sphenoid bone and the temporal bone of the skull. The cavernous sinus is an important structure because of its location and its contents which include the third cranial… …   Medical dictionary

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