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Is ADHD on the Autism Spectrum? Clearing Up the Confusion
When my therapist suggested that I might have ADHD, I couldn’t get home to start Googling fast enough. I was in my early 30s, and at the time, I was unaware of how ADHD manifests in adult women. But because I wasn’t hyperactive, I was skeptical of my therapist’s conclusion and wanted to do my own homework.
As I was researching, I noticed that many of the signs of ADHD and autism appear very similar, like hyperfocus and niche interests, sensory sensitivities, and difficulty with executive function. I experienced each of these, and wondered if it was possible that I actually had autism, or perhaps autism and ADHD—known colloquially as AuDHD.
When I had a formal evaluation, my psychiatrist determined that I did, in fact, have ADHD, but not autism. Autism and ADHD are both neurodevelopmental differences under the umbrella of "neurodivergence" and not on the same spectrum. But, given the ADHD and autism overlap in certain ways, and my resulting confusion, I wondered about the nuances of my ADHD assessment results and how it compared to an autism diagnosis.
In this article, we'll explain the overlaps between autism and ADHD, while emphasizing that they are both unique.
Dorsal Vagal Shutdown: When Your Nervous System Goes Offline
When Aaron, 35, experiences dorsal vagal shutdown as an autistic person, his body feels massively heavy and isn’t as responsive as normal. Mentally, everything feels more taxing.
“I feel uncoordinated because even just moving around and existing takes significant effort,” he says. “If I try to power through those moments, it feels like pulling myself out of a vat of sludge, and then moving around still covered in it.”
Simply put, dorsal vagal shutdown is “a state of overwhelm of the nervous system,” explains Jephtha Tausig, PhD, a licensed clinical psychologist specializing in autism. It commonly occurs in autistic and neurodivergent adults, like Aaron.
Although people have started to use the term “dorsal vagal shutdown,” and it appears in online discourse, there is no strong empirical evidence that we can measure or isolate a discrete dorsal vagal shutdown state in autistic adults, says Dr. Rachel Loftin, PhD, chief clinical officer at Prosper Health.
For the reasons above, we’ll focus on what the science clearly supports and what people reliably experience, and provide examples of support that can help.
Unmasking: What It Means for Autistic Adults and How to Do It Safely
For autistic people, masking—presenting yourself in a way, either consciously or unconsciously, to fit in better in a neurotypical world—can be both necessary and exhausting. That’s where the concept of “unmasking” comes in.
Unmasking is the process of making space for your autistic or neurodivergent traits to shine through in your day-to-day life. It's about working toward honoring your unique brain and what it needs, slowly letting go of the pressure to appear neurotypical.
“Unmasking, in the simplest terms, is about letting your nervous system participate in your life instead of fighting it all day,” says Stephanie Steele-Wren, PsyD, a licensed psychologist specializing in adult autism. “It isn’t about turning into a different person or suddenly being ‘your real self.’ Unmasking is the gradual decision to stop overriding your nervous system to appear ‘acceptable.’”
But it’s important to note that autistic masking exists for a reason, and unmasking is not mandatory. Like most things related to autism, it’s not black and white. That’s why we’re here to break down what you need to know about unmasking, why it can be beneficial (when done safely), what it looks like in practice, and what supports can help.
