A neurodevelopmental disorder is described as genetic or acquired biological disability in the functioning of the brain that is responsible for the dysfunction in the child’s behaviour. It also affects the memory and ability to learn such as mental retardation, dyslexia, cerebral palsy and autism etc. It addresses the complexities of the of the central nervous system development in children. There are four major categories of these disorders which include: cognitive dysfunction, behavioural problems, motor dysfunction, and seizures. The neurodevelopmental behavioural disorder includes physical as well as functional abnormalities. The migration of neurons may be affected by exposure to x-ray radiation, alcohol or methylmercury.