Which ventricle is located between the pons, medulla, and cerebellum and continues to the central canal of the spinal cord?

• A. Third ventricle
• B. Fourth ventricle
• C. Lateral ventricle
• D. Cerebral aqueduct

Answer: (B)

The ventricle that sits between the pons and medulla in front of the cerebellum and continues downward as the central canal of the spinal cord is the fourth ventricle. It occupies the posterior aspect of the brainstem region, tucked between the lower brainstem and the cerebellum, and, inferiorly, its space narrows to become the central canal that runs through the spinal cord. The fourth ventricle connects upward to the third ventricle via the cerebral aqueduct, and its CSF can flow outward into the subarachnoid space through the openings around it. This positioning and connection explain why it is described as between those structures and continuous with the spinal canal.