Chapter 18.docx - `Chapter 18 Environmental Risk Factors in ASD There is not one environmental cause of ASD There are environmental factors that may

Chapter 18.docx - `Chapter 18 Environmental Risk Factors in...

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`Chapter 18: Environmental Risk Factors in ASD There is not one environmental cause of ASD There are environmental factors that may increase the risk of ASD in specific individuals These environmental factors tend to not be specific to ASD and infer increased risk to a variety of developmental problems Likely a combination of genetic and environmental factors According to the book, “current thinking is that multiple causes are likely operating in any individual and can include several or many genes and environmental factors.” Video: Timing: A reliable diagnosis can usually be given by 2 years A provisional diagnosis can usually be given 12 months Certain signs of ASD can be seen by 6 months These are all behavioral markers – based on behaviors we can see and measure Changes in the brain likely precede behavioral findings Differences are likely occurring during in utero development in most cases
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