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Superior Petrosal Sinus
Cardiovascular System

Superior Petrosal Sinus

Sinus petrosus superior

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Quick Facts

Origin: Cavernous sinus.

Course: Extends along the superior border of the petrous part of the temporal bone, in the groove for the superior petrosal sinus, to drain into the sigmoid sinus.

Tributaries: Vein of vestibular aqueduct, petrosal vein, and superior veins of cerebellum.

Drainage: Superior cerebellum, internal ear.

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Origin

The superior petrosal sinuses are small sinuses which originate from the posterosuperior aspects of the cavernous sinuses, on each side of the sella turcica.

Course

Each superior petrosal sinus passes backwards from the cavernous sinus along the attached margin for the tentorium cerebelli. It crosses superior to the trigeminal nerve, then follows a shallow groove on the superior border of the petrous part of the temporal bone. It drains into the sigmoid sinus near its origin.

Tributaries

The superior petrosal sinus receives several tributaries prior to merging with the sigmoid sinus. For instance, it receives the vein of the vestibular aqueduct, a petrosal vein, and tributaries from the medulla oblongata, pons, and superior cerebellar surfaces.

Structures Drained

The superior petrosal sinus drains venous blood from the medulla oblongata, pons, and superior cerebellum, and internal ear.

Learn more about this topic from other Elsevier products

Superior Petrosal Sinus

ScienceDirect image

9 If the superior petrosal sinus cannot be identified, the cavernous sinus can be packed through Parkinson’s triangle, bounded by the lower margin of the trochlear nerve, the upper margin of the ophthalmic division of trigeminal nerve, and a line connecting the point of entry of trochlear nerve into the dura to the point of entry of trigeminal nerve into Meckel’s cave.

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