The interventricular foramen is a small opening in the brain that connects the two lateral ventricles, which are fluid-filled cavities. This foramen allows the flow of cerebrospinal fluid (CSF) between the lateral ventricles and the third ventricle, helping to maintain proper pressure and circulation of CSF in the brain. Located near the center of the brain, the interventricular foramen is also known as the foramen of Monro. It plays a crucial role in the brain's ventricular system, which includes other structures like the third ventricle and fourth ventricle. Proper functioning of this foramen is essential for brain health and function.