It’s difficult to diagnose autism spectrum disorder (ASD) before the age of two years. Clearly, the sooner problems can be identified the better to allow for earlier intervention. A new study from Yale School of […]
Autism: Symptoms and Diagnosis
Symptoms of autism spectrum disorder (ASD) usually appear between the ages of 2 and 3, although children are often not diagnosed until age four. While signs of autism can be seen in babies, problematic behavior (withdrawn, aggressive or repetitive behaviors) and language difficulties frequently emerge after normal infant and toddler development. Social interaction is severely limited.
See our article Symptoms of Autism Spectrum Disorder for details on signs and symptoms of ASD.
Two million people have the diagnosis in the USA, reflecting a dramatic increase in the disorder over the past 40 years. Reasons for the symptom increase in recent decades are assumed to include environmental factors in addition to greater awareness and changes in diagnostic criteria.
Current research includes efforts to discover early causes and signs of autism so treatment interventions can begin as soon as possible.
A diagnosis is made based on behaviors; no blood test can determine the presence of autism spectrum disorders. Parents who notice unusual behaviors or changes in their child’s developmental progress should discuss the situation with a trained professional as soon as possible.
Related articles are shown below. If you don’t find what you’re looking for, you can search using the box at the upper right of the page or browse our forums.
A revised version of a popular autism screening tool provides better identification.
Children with autism spectrum disorder (ASD) do not follow typical patterns when developing social and communication skills. Parents are usually the first to notice unusual behaviors in their child. Often, certain behaviors become more noticeable […]
June 30, 2015: This page has been updated to include the sad reality that autism researcher Dr. Jeffrey Bradstreet passed away June 19, 2015. An autopsy and review of his death are currently underway. We […]
At times, patients have gone to physicians with symptoms similar to Tourette syndrome, when the underlying cause of the symptoms was Lyme disease. Lyme has also been linked to some cases of autism (see below). […]
Majid Ali, MD A simple model is presented for understanding the spectrum of Attention Deficit Disorder/Hyperactivity, learning disability, obsessive-compulsive disorder, autism, and Tourette syndrome. In this model, the focus is on developmental and acquired problems […]
- Your World and You: Tips to Improve Your Family’s Health – Issue 40 (Premium)
- Dr. Albert Mensah: Treating the Root Causes of Anxiety and Depression in Kids
- Answers for Light Sensitivity in Autism, ADHD, and Tic Disorders (Premium)
- Seed, Feed, and Weed to Reverse Inflammatory Disease
- 4 Steps You Can Take to Detoxify Chemicals