Inferior petrosal sinus and veins

View Details

Status

Done

Parent item

Veins

Inferior petrosal sinus and veins

• Posterior view of the anterior portion of the posterior fossa with the brainstem and cerebellum removed.

• The inferior petrosal and sigmoid sinuses can be seen through the dura.

• The dural roof of the basilar, inferior petrosal, and sigmoid sinuses have been removed.

• The inferior petrosal sinuses extend from the basilar sinus above to the jugular bulbs below.

• The inferior petrosal veins arise on the brainstem and empty into the lower part of the inferior petrosal sinus, jugular bulb, or distal sigmoid sinus.

• An inferior petrosal vein passes from the medulla between the glossopharyngeal and vagus nerves to the jugular bulb.

• It receives the drainage of the vein of the inferior cerebellar peduncle, which crosses the peduncle just below the lateral recess.

• An inferior petrosal nerve passes behind the glossopharyngeal and vagus nerves to empty into the terminal part of the sigmoid sinus.

• An inferior petrosal vein crosses behind the nerves entering the jugular foramen to reach the sigmoid sinus.