The brain is a large complex organ of the nervous system situated within the skull. It controls and regulates the body’s activities. It interprets the senses and is responsible for intelligence, memory, behavior and emotions. A healthy brain works quickly and efficiently. A neurological disorder can result in damaged or poorly developed nervous tissue impairing brain function. The brain may be affected by developmental disorders, degenerative diseases, metabolic diseases, neurogenetic diseases, cerebrovascular diseases, convulsive disorders, infectious diseases and tumors.