While not the sole cause, dopamine system abnormalities are a significant contributing factor and target in Autism Spectrum Disorder (ASD), say researchers, with evidence pointing to altered dopamine signaling in brain circuits related to motivation, reward, and social behavior, leading to challenges like repetitive behaviors and difficulties with social interaction, and driving research into dopamine-targeting treatments.
Specifically, there is evidence of reduced dopamine release in the prefrontal cortical area and diminished responsiveness of the nucleus accumbens in individuals with ASD.
There is not just one cause of ASD. Many different factors have been identified that may make a child more likely to have ASD, including environmental, biologic, and genetic factors.
Autistic people may: find it hard to communicate and interact with other people. find it hard to understand how other people think or feel. find things like bright lights or loud noises overwhelming, stressful or uncomfortable.
If you have low support needs (high-functioning autism), you may have symptoms such as:
Around 90% of autism cases are attributed to genetic factors, meaning autism is highly heritable, with many different genes contributing, rather than a single cause, often interacting with environmental influences during early brain development, though specific environmental factors don't cause it but can increase risk. Twin studies show strong genetic links, with concordance rates between 60-90% in identical twins, and research points to complex interactions of many genes and prenatal/perinatal factors.
The "6-second rule" for autism is a communication strategy where a speaker pauses for about six seconds after asking a question or giving information, giving the autistic person extra time to process it without feeling rushed, which helps reduce anxiety and allows for a more thoughtful response, reducing frustration for both parties. Instead of repeating or rephrasing, which can be confusing, you wait, and if needed, repeat the exact same words after the pause.
Just like everyone, autistic people can have good mental health. However, according to the autism research charity Autistica, seven out of ten autistic people have a mental health condition such as anxiety, depression, attention deficit hyperactivity disorder (ADHD) or obsessive-compulsive disorder (OCD).
In general, people who have an active lifestyle are much more emotionally resilient and focused. There also seems to be some evidence that physical exercise helps people with depression and ADHD, which are commonly co-occurring conditions with autism.
The researchers found that of 890 individuals who met the inclusive definition of autism and had IQ scores available, 59 percent had an average or higher IQ score. Of the 453 individuals who met the narrow criteria, 51 percent had an average or higher IQ score.
There's no single "best" treatment for autism worldwide; rather, effective approaches are individualized, with Behavioral Therapies like Applied Behavior Analysis (ABA), speech, occupational, and educational therapies being the most evidence-based for skill-building, communication, and managing behaviors, alongside potential medication for associated symptoms. A comprehensive plan often combines therapies like ABA (focusing on positive reinforcement for skills), educational programs, speech/language support, occupational therapy (daily living), and family training, tailored to the person's unique needs to improve quality of life.
Donald Triplett, autism's 'Case 1,' dies at 89. Triplett gained media attention for his autism later in life, and he became the face of the effort to research the lives of older adults with autism.
Signs of autism in adults
Many medical conditions are linked to low levels of dopamine, including Parkinson's disease, restless legs syndrome, depression, schizophrenia and attention deficit hyperactivity disorder (ADHD). Treatments are available to manage these conditions.
Some studies indicate that the oxytocin system with its social implications might be different in people with autism spectrum disorder. With summarizing evidence of 31 studies, this meta-analysis suggests that children with autism spectrum disorder have lower blood oxytocin levels compared to neurotypical individuals.
Physical activity is one of the most effective ways to boost dopamine levels. Exercise helps release dopamine, improving mood, focus, and reducing anxiety. Activities like running, swimming, or even dancing can help children with autism feel better and stay engaged.
People with Autism Spectrum Disorder need three basic factors for support: safety, acceptance, and competence. The focus has shifted from finding a cure to promoting acceptance and neurodiversity over the last two decades.
Self-Care: Regular self-care practices such as mindfulness, deep breathing, or sensory breaks can help regulate emotions and reduce anxiety. Deep diaphragm breathing is excellent for returning the nervous system from dorsal vagal to ventral vagal functioning.
Research suggests that the average autism life expectancy is as low as 39 years. According to a different study, the average autism life expectancy was around 54 years old. That's still lower than the 72-year life expectancy for the general population.
People with autism often have co-occurring conditions, including epilepsy, depression, anxiety and attention deficit hyperactivity disorder.
Conditions That Can Be Mistaken for Autism. These include: Speech delays, hearing problems, or other developmental delays: Developmental delays are when your child doesn't do things doctors expect kids their age to be able to do. These can include language, speech, or hearing problems.
Chinning is a form of repetitive self-stimulatory behavior (stimming) that you may notice in children or adults with autism. It involves pressing, rubbing, or holding the chin against objects, surfaces, or even hands to gain sensory input or comfort.
Children with autism may exhibit rigidity, inflexibility and certain types of repetitive behavior such as: Insistence on following a specific routine. Having difficulty accepting changes in the schedule. A strong preoccupation with a particular interest.
"Looping" in autism refers to getting "stuck" in repetitive mental cycles, replaying thoughts, questions, worries, or phrases endlessly, often triggered by stress, sensory overload, or uncertainty, and linked to challenges with executive function and attention. It's a non-clinical term for perseveration or rumination, where an autistic individual's brain struggles to shift focus from an internal loop, which can be mentally exhausting but sometimes also comforting.