Petrosal Sinuses - Human Anatomy | Kenhub

This video covers the anatomy of the petrosal sinuses (superior and inferior petrosal sinus), their location, drainage and function. Take our quiz on the dural venous sinuses at https://khub.me/x35dr

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There are four petrosal sinuses leaving the middle cranial fossa: two superior petrosal sinuses and two inferior petrosal sinuses, one on each side. They run along the petrous part of the temporal bone in the base of the tentorium cerebelli. The petrosal dural sinuses belong to the dural venous sinuses and therefore receive and transport blood from the brain. Like the other dural venous sinuses the petrosal sinuses are valveless.

The superior petrosal sinus receives venous blood from the cerebellar veins, the inferior cerebral veins and the labyrinthine vein. The inferior petrosal sinus has tributaries from the cavernous sinus and the labyrinthine vein as well as from the medulla oblongata, pons and the inferior surface of the cerebellum

In this tutorial we go over the most important aspects of the anatomy of the petrosal sinuses:

- 0:12 what are dural venous sinuses?
- 1:04 petrosal sinuses location
- 1:19 superior petrosal sinus anatomy and drainage
- 2:19 inferior petrosal sinus anatomy and drainage

Want to test your knowledge on the meninges of the brain? Take this quiz: https://khub.me/7sze1

Read more on the other dural venous sinuses in our free article, in order to get a better understanding of the human brain's venous drainage: https://khub.me/jwe6x


For more engaging video tutorials, interactive quizzes, articles and an atlas of Human anatomy and histology, go to https://khub.me/a2vzy