L3 SAQ - The Intricacies of the Venous System

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What are the three types of intracranial veins?

Superficial, deep, and dural veins

Which vein is the most common location for malformation in infants and foetuses?

Great cerebral vein (of Galen)

Where does the superior sagittal sinus begin and end?

Begins at the crista gali of the ethmoid bone and ends near the internal occipital protuberance

Which sinuses drain into the confluence of the sinuses?

Superior sagittal sinus and straight sinus Signup and view all the answers

Where do the transverse sinuses run?

In the posterior margin of the tentorium cerebelli Signup and view all the answers

Where is the sigmoid sinus located?

At the jugular foramen Signup and view all the answers

What are the three folds of dura mentioned in the text?

Falx cerebri, falx cerebelli, and tentorium cerebelli Signup and view all the answers

What is the name of the sinus that runs inside the inferior border of the falx cerebri?

Inferior sagittal sinus Signup and view all the answers

Where does the blood ultimately drain to in the venous system?

Internal jugular bulb and vein Signup and view all the answers

What are the notable landmarks mentioned in the text?

Folds of the dura, cavernous sinus, clivus, quadrigeminal cistern, and internal occipital protuberance Signup and view all the answers

What are dural sinuses?

Dural sinuses are large endothelial-lined trabeculated venous channels encased within the folds or reflections of dura that define and form their walls. Signup and view all the answers

How do dural venous sinuses communicate with extracranial veins?

Dural venous sinuses communicate with extracranial veins directly via diploic veins in the calvarium and emissary veins through basilar foramina. Signup and view all the answers

Where do dural venous sinuses receive blood from?

Dural venous sinuses receive blood from superficial (cortical) veins and deep (subependymal) veins. Signup and view all the answers

What are cerebral veins?

Cerebral veins are thin-walled, valve-less structures that cross the subarachnoid space, pierce arachnoid dura to enter the dural venous system. Signup and view all the answers

Where do the frontal cortical veins drain to?

The frontal cortical veins drain to the superior sagittal sinus. Signup and view all the answers

What is the Vein of Trolard also known as?

The Vein of Trolard is also known as the superior anastomotic vein. Signup and view all the answers

Where does the Vein of Trolard drain to?

The Vein of Trolard drains to the Vein of Labbe at the posterior rami of the lateral or sylvian fissure. Signup and view all the answers

What is the role of the Great vein of Galen?

The Great vein of Galen forms from the union of the internal cerebral veins and the vein of Rosenthal, it drains to the straight sinus at the falcotentorial apex. Signup and view all the answers

What is the Cavum veli interpositi?

The Cavum veli interpositi is a space within the double-layered tela choroidea of the third ventricle that communicates with the quadrigemminal cistern. Signup and view all the answers