IMPAIRMENT NEURAL DEVELOPMENTS AND SYMPTOMS OF AUTISM DISORDER Essay

Autism spectrum disorders are a common neural developgenial brain condition (Cheng et al., 2010). It does not have unifying neurobiological or pathological etiology (Geschwind& Levitt, 2007) .It characterized by impaired social interaction and communication skills and restricted repetitive behavior (Johnson & Myers, 2007). Medical condition such as mental retardation, chromosomal anomalies and seizures are often appear with autism (Casanova, 2007). During outgrowth 3 years of childhood, these major symptoms are revealed (Casanova, 2007). Autism is one of three recognized condition and the other both know as Aspergers syndrome (Levy, Mandell, & Schultz, 2009). There are also secondary symptoms that may not be shown in individual with autism disorder such as lower IQ performance and sensory sensitivity (Alexander et al., 2006). It occurs due to altered recognition and connection of brain nerve cell and their synapses (Levy et al., 2009). Other factor set up to the occurrence of a utism are genetics or environmental factors or both (Rodier, 2004). In 1960s, it was estimated to occur in five in every 10,000 child cosmopolitan but this number is increased recently to be 72 in every 10,000 child since the 1990s due to the change in diagnostic rehearse and media attention (Newschaffer et al, 2007). The reason of increasing this disorder in recent year is still unknown (Comi, Zimmerman, Frye, Law, & Peeden, 1999). This essay will discuss the causes of Autism spectrum disorders, brain structure changes that concern in this condition and thus the major and secondary symptoms occurrence in relating to these structure impaired development in the brain.Autism appears between embryo development and the first 3 years of child development and c... ... Schendel, D., & Windham, G. C. (2007).The Epidemiology of Autism Spectrum Disorders. Annu. Rev. Public Health, 28, 21.121.Geschwind D. H., & Levitt, P. (2007), Autism spectrum disorders developmental disconnection syndro mes. Neurobiology 17,10311.Johnson, C. P., & Myers, S. M. (2007). Identification and Evaluation of Children With Autism Spectrum Disorders. PEDIATRICS, 120, 1183-1215.Levy, S. E., Mandell, D. S., & Schultz, R. T. (2009). Autism. The Lancet, 374(9701), 1627 1638. Lam, K. S. L., & Aman, M. G. (2007). The Repetitive Behavior Scale-Revised Independent Validation in Individuals with Autism Spectrum Disorders. Springer, 37, 855866.Rodier, P. M. (2000). The untimely Origins of Autism. Scientific American, 56-63.Rodier, P. M. (2004). Environmental Causes of Central Nervous System Maldevelopment. PEDIATRICS, 113, 1076-1083.