For a considerable time scientists were searching for one clear brain difference that may be lead to autistic behaviours. However, this hope has yet to be fulfilled, with few studies identifying brain characteristics that are shared by different individuals diagnosed with autism. This may be a further indication that autism has many different causes, but it may also be a reflection of the difficulties in studying the brain. Currently, scientists use a variety of clever techniques to understand the structure and function of the brain, such as magnetic fields, X-rays and radioactive chemicals. As ingenious as these methods are, they are unable to provide a full measure of the tremendous complexity of how the brain operates.
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