petrosal sinus

petrosal sinus
petrosal sinus n either of two venous sinuses on each side of the base of the brain:
a) a small superior sinus that connects the cavernous and transverse sinuses of the same side called also superior petrosal sinus
b) a larger inferior sinus that is situated in a sulcus on each side formed by the junction of the petrous portion of the temporal bone and the basilar portion of the occipital bone and that extends from the posterior inferior end of the cavernous sinus through the jugular foramen to join the internal jugular vein of the same side called also inferior petrosal sinus

Medical dictionary. 2011.

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Look at other dictionaries:

  • petrosal sinus — noun : any of four venous sinuses at the base of the brain: a. : a small superior sinus on each side that connects the cavernous and lateral sinuses of the same side b. : a larger inferior sinus on each side that extends from the end of the… …   Useful english dictionary

  • Inferior petrosal sinus — Infobox Vein Name = Inferior petrosal sinus Latin = sinus petrosus inferior GraySubject = 171 GrayPage = 659 Caption = Dural veins Caption2 = The sinuses at the base of the skull. (Inferior petrosal sinus visible at center, between superior… …   Wikipedia

  • Superior petrosal sinus — Infobox Vein Name = Superior petrosal sinus Latin = sinus petrosus superior GraySubject = 171 GrayPage = 659 Caption = Dural veins Caption2 = The sinuses at the base of the skull. (Superior petrosal sinus visible at center left.) DrainsFrom =… …   Wikipedia

  • inferior petrosal sinus — n PETROSAL SINUS (b) …   Medical dictionary

  • superior petrosal sinus — n PETROSAL SINUS (a) …   Medical dictionary

  • petrosal sinus inferior — s. petrosus inferior …   Medical dictionary

  • petrosal sinus superior — s. petrosus superior …   Medical dictionary

  • inferior petrosal sinus sampling — (IPSS) a test for the cause of Cushing syndrome: catheters are inserted into the inferior petrosal sinuses and venous blood is withdrawn and analyzed for its levels of corticotropin; this is then compared with corticotropin levels in the patient… …   Medical dictionary

  • groove for inferior petrosal sinus — sulcus sinus petrosi inferioris …   Medical dictionary

  • groove for superior petrosal sinus — sulcus sinus petrosi superioris …   Medical dictionary

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