Oliver 1The brain is essential for growth and development in humans. During the critical period of development, how we experience the world plays a role in the development of our brains. In recent years, autism spectrum disorder (ASD) has become prevalent among disorders that affect brain development. Thanks to advances in technology, the world is able to understand how important brain research is for the early diagnosis of autism. Leo Kanner is the first person to formally identify autism. In 1943 Kanner defined autism as “autistic disorder of affective contact”. Initially, there was much confusion regarding Kanner's description of autism because it was closely related to the characterization of other mental disorders (Blancher and Christensen 2011). To effectively study and understand the causes of brain disorders, researchers have conducted experiments to explore the differences between a normal brain and an autistic brain. Researchers have found that structural differences, such as size and composition, can have a significant impact on how the autistic brain processes information. Therefore, there is variation between a normal person and one with autism. Structural differences cause an autistic person to have impaired social interaction and difficulties in communication, both verbal and non-verbal. The first signs of ASD may appear in the reflexive/spontaneous phase (from the third fetal month to the first year of life). Autistic children tend to avoid interactions with other humans. They tend to avoid eye contact and react negatively to touch. Furthermore, autistic children do not develop as quickly as normal children. A normal child will grasp an object or react to various body gestures given by others. Halfway through the article... ten casein-free diets in autism: a study of the effects on food choice and nutrition”. Journal of Human Nutrition and Dietetics, 2002, 15: 261–269.Goldring, Stacy; Herrera, Adriana M.; Hepburn, Susan; Laura Greiss-Hess; Susanna Macari; Sally J. Rogers; Sally Ozonoff; Joel Steele; Gregory S. Young. "General motor development, movement abnormalities, and early identification of autism." The Journal of Autism and Developmental Disorders, 2008, 38(4): 644-656.John, L.R.; Tomorrow, Eric M.; Walsh, Christopher A. “Autism and Brain Development.” The Cell, 2008, 135:396–400. Palmer, Pat and Priven, Joseph. “Psychiatric disorder and the broad autistic phenotype: Evidence from a family study of multiple-incidence autism families.” The American Journal of Psychiatry, 1999, 156(4):557-567. Reynolds, Livingston and Wilson. Measurement and evaluation in education.