## **Core Concept**
The deep venous system of the brain is a crucial part of cerebral circulation, responsible for draining deoxygenated blood from the brain's deeper structures. It includes several key veins that ultimately drain into the dural sinuses. Understanding the components of the deep venous system is essential for neurology and neurosurgery.

## **Why the Correct Answer is Right**
The deep cerebral venous system consists of several key structures:
- **Internal cerebral veins**: These veins run together and form the **great cerebral vein of Galen**, which then merges with the **inferior sagittal sinus** to form the **straight sinus**.
- **Basal veins (of Rosenthal)**: These veins are also part of the deep cerebral venous system and drain into the **great cerebral vein of Galen**.
- **Great cerebral vein (of Galen)**: This is a short, deep vein that receives blood from the **internal cerebral veins** and **basal veins**, then drains into the **straight sinus**.

## **Why Each Wrong Option is Incorrect**
- **Option D: Cavernous sinus** - This is actually part of the superficial venous system of the brain and not considered part of the deep venous system. It receives blood from the **superficial middle cerebral vein** and drains into the **petrosal sinuses**.

## **Clinical Pearl / High-Yield Fact**
A key clinical correlation is that thrombosis in the deep cerebral venous system, such as in the **great cerebral vein of Galen** or **internal cerebral veins**, can lead to severe cerebral edema and infarction, particularly in the **thalamus** and **basal ganglia**. This condition is more common in children and can present with acute neurological deterioration.

## **Correct Answer:** B. a, b, c.