The ventricular system
While the ventricular system is naturally not involved in cognitive processing since it consists of cavities filled with cerebrospinal fluid, it is good to acquaint oneself with the ventricular system as the ventricles are prominent landmarks in the brain. The ventricular system, consists of the central canal that runs from the spinal cord up to the base of the brain where it fuses into the cerebral aqueduct. The so-called third ventricle and, bilaterally, left and right lateral ventricles reside superior to the cerebral aqueduct. Abnormal enlargement of ventricle size is a robust sign of pathology that can be seen with neuroimaging methods such as magnetic resonance imaging.