What is "fourth ventricle"?

The fourth ventricle is a cavity within the brainstem that is responsible for producing and circulating cerebrospinal fluid (CSF). It is a crucial component of the ventricular system, which helps maintain the balance of fluid and provides protection for the brain and spinal cord. The fourth ventricle is involved in various physiological functions, including the regulation of CSF pressure, nutrient supply to the brain, and removal of waste products. It plays a vital role in the overall functioning of the central nervous system.