The structure of human brain is complicated and not yet fully understood till date. As the age of the human brain advances, some characteristic structural changes occur that are considered to be normal and are expected too. According to Schochet1 (1998) as the ageing advances, the brain undergoes many gross and histological changes such as regression of the brain tissue leading to the enlargement of the ventricles. Previously before the advent of the modern imaging techniques such as computerized tomography and magnetic resonance imaging many autopsy studies were done to understand the normal structure of brain. Advances in sophisticated and sensitive imaging techniques i.e. computerized tomography and magnetic resonance imaging helps in understanding of the normal structure of brain. According to the BurtonP Drayer6 enlargement of cerebrospinal fluid spaces during ageing in specific locations clearly visible with computerized tomography and magnetic resonance imaging scans. The purpose of this study was to examine the different dimensions of ventricular system.The ventricular size of the brain range that changes as age advances encountered in clinical practice.