Today's selection explores the evolving understanding of ADHD in older adults, the intersection of autism and LGBTQIA+ identities, and how socioeconomic factors influence brain imaging results (Blog Name: Living on the Spectrum).
ADHD Symptoms and Treatment in Adults Over 60
Overlap with Cognitive Aging
ADHD symptoms do not disappear with age and often intensify after 60 due to age-related cognitive decline and the loss of daily structure following retirement. These symptoms frequently mimic or overlap with Mild Cognitive Impairment (MCI) or early dementia. In women, the decline of estradiol during menopause reduces dopamine receptor sensitivity, further exacerbating executive function deficits.
Correlation with Lewy Body Dementia
Research in the European Journal of Neurology indicates that nearly 48 percent of adults with Lewy body dementia (LBD) had ADHD symptoms earlier in life. This rate is three times higher than that found in patients with Alzheimer’s or healthy peers. ADHD may serve as an early indicator for specific neurodegenerative differences later in life.
Clinical Barriers and Treatment Safety
Many healthcare providers lack training to recognize ADHD in patients older than 50 and remain hesitant to prescribe stimulants due to concerns about cardiac side effects. However, current research shows no significant association between ADHD medications and cardiovascular disease in older populations. Stimulants, hormone therapy, and alpha agonists can significantly improve quality of life for seniors by addressing "Swiss cheese memory" and executive dysfunction.
The Intersection of Autism and LGBTQIA+ Identities
Higher Prevalence of Sexual Diversity
Studies of independent autistic adults reveal that approximately 41% identify as LGBQ+, compared to just 7% of the general population. Data from the SPARK study shows high rates of bisexual, asexual, and pansexual identities. Additionally, 9% of participants identify as transgender or nonbinary.
Masking and Minority Stress
Autistic adults who identify as sexual minorities report higher rates of masking—consciously or unconsciously hiding autistic traits—than their heterosexual peers. This intersection of identities leads to "minority stress" from stigma and discrimination, which correlates with increased risks for anxiety, depression, and lower life satisfaction. Individuals assigned female at birth report significantly higher rates of masking and are more likely to identify as sexual minorities.
Healthcare Gaps for Diverse Adults
Clinicians often fail to provide age-appropriate sexual health screenings for autistic adults due to faulty assumptions that they are not sexually active. Personal accounts from the community highlight experiences of infantilization and disbelief when coming out to providers, emphasizing the need for medical professionals to recognize these intersecting identities to provide effective mental health support.
Ten Years of Findings from the SPARK Autism Study
Genetic Discoveries and Diagnostic Trends
The SPARK study, now including 425,000 participants, has identified over 200 autism-related genes and provided specific genetic causes to 4,000 individuals. Data shows that while most males receive diagnoses in childhood, many females are diagnosed in adulthood, with 36 being the most common age of diagnosis.
Socioeconomic and Mental Health Reality
While over 75% of independent autistic adults have post-secondary education, their household income remains below the national average, and only half are employed. Co-occurring conditions are highly prevalent, including anxiety (65%), depression (61%), and ADHD (53%). The study also identified a specific non-protein-coding RNA, PTCHD1-AS, that influences social and repetitive behaviors, leading clinicians to reclassify specific genetic deletions as pathogenic.
Socioeconomic Status and Brain Imaging Accuracy
Socioeconomic Influence on Brain Structure
A study of 12,000 children suggests the perceived link between IQ and brain structure is largely influenced by socioeconomic status (SES). Researchers found that SES accounts for 16 percent of the variance in how brain regions communicate and 13 percent of cortical thickness. Machine-learning models designed to predict IQ were actually identifying brain signatures related to SES, sleep, and screen time.
Implications for Neuroscience Research
The findings suggest that SES impacts sensory and motor cortices rather than regions associated with higher-order cognition. Experts emphasize that neuroimaging research must control for socioeconomic variables to avoid misleading correlations. These brain signatures may reflect immediate physiological states like stress rather than permanent developmental traits.
Practical Safety and Mental Health Monitoring
Identifying Depression in Non-Speaking Adults
A survey of parents of 152 autistic adults with limited speech found that while 40% suspected their child was depressed, only 7% had a professional diagnosis. Key indicators include sad facial expressions, social withdrawal, and changes in repetitive behaviors. Caregivers should treat any significant departure from an individual's "baseline" behavior as a potential mental health concern rather than an inherent feature of autism.
Water Safety and Drowning Prevention
Children with autism face a high risk of drowning, often linked to wandering or elopement. Safety experts recommend five layers of protection: physical barriers (fences/alarms), constant supervision by a "water watcher," adapted swimming lessons, life jackets, and emergency preparedness. Using social stories and AAC devices can help children understand the difference between safe and unsafe water environments.
Podcast Transcript
Aaron: Hello everyone, and welcome to the podcast. I’m Aaron.
Jamie: And I’m Jamie.
Aaron: We’ve been looking through a lot of recent reports and research lately, and it feels like we’re in this moment where our understanding of things like Autism and ADHD is expanding so fast it’s almost hard to keep up. But what struck me this time wasn't just the data—it was how much of it is about how these conditions show up across a whole lifetime, not just in childhood.
Jamie: You’re absolutely right. There’s a shift toward looking at the "lived experience" of adults and the biological factors we might have missed because we were looking in the wrong places. It’s less about a single label and more about the complex layers of a person’s life.
Aaron: Speaking of looking in the wrong places, I saw this study about IQ and brain structure that really stopped me in my tracks. For years, we’ve heard that certain brain shapes or connections are "the signature" of high intelligence. But this new research suggests that might be a bit of a mirage?
Jamie: It’s a massive study, Aaron—nearly 12,000 children. They used machine learning to try and predict IQ from brain scans, but they found that what they were actually seeing were the footprints of socioeconomic status, or SES. It turns out things like sleep, screen time, and the environment someone grows up in account for a huge chunk of those brain differences—around 13 to 16 percent.
Aaron: That’s a bit mind-boggling. It makes me wonder how many parents are looking at their child’s development and worrying about "innate" ability, when what the brain is actually reflecting is just the stress or the resources of their daily life.
Jamie: Exactly. The researchers pointed out that these signatures were often in the sensory and motor parts of the brain, rather than just the areas we associate with "thinking." It’s a reminder that the brain is incredibly plastic. It responds to the immediate physiological state—like stress or arousal—more than we realized. We have to be so careful not to mistake a reflection of someone’s circumstances for a reflection of their potential.
Aaron: It really changes the lens. And it’s not just the environment; we’re also digging deeper into the "dark matter" of our biology. I saw some talk about a specific genetic find involving something called non-protein-coding RNA? I’ll be honest, my eyes usually glaze over at "non-coding," but this sounded different.
Jamie: It’s fascinating. Usually, when we look at genetics in autism, we look at genes that make proteins. But this study focused on a segment called PTCHD1-AS. It’s on the X chromosome and it doesn't make a protein at all. Instead, it seems to act like a regulator or a "manager" for brain circuits in the striatum, which is a region tied to social behavior and repetitive movements.
Aaron: So, even if the "main" genes are fine, if the manager isn't showing up for work, the whole system shifts?
Jamie: In a way, yes. When they looked at over 9,000 autistic boys, they found small deletions in this specific area. In mice, these deletions led to things like increased self-grooming and less sociability, but it didn't affect their memory or learning. It’s a very specific tweak to how neurons strengthen their connections. For families, this is significant because clinicians are now starting to see these specific deletions as "pathogenic"—meaning they have a clearer answer for why certain traits are appearing.
Aaron: It’s amazing how we’re moving from "we don't know" to "we found the specific regulator." And this scale—thousands of participants—seems to be the new standard. I was reading about the SPARK study reaching over 400,000 people. That’s an incredible community.
Jamie: It’s the largest of its kind. Because they have so many people, they’re starting to move away from "autism" as one big bucket. They’re proposing four distinct types and looking specifically at how it presents in girls, who often "mask" their traits more than boys. They’re also following people as they age, which is a huge gap in our knowledge.
Aaron: The "masking" part really connects to another finding that jumped out at me—the intersection of autism and identity. I saw that a huge percentage of autistic adults identify as part of the LGBTQ+ community.
Jamie: The numbers are striking. In one study of independent autistic adults, about 41 percent identified as a sexual minority, compared to maybe 7 percent in the general population. And you mentioned masking—those who identify as sexual minorities, especially those assigned female at birth, report much higher rates of it.
Aaron: I can only imagine the mental toll of that. You’re not just navigating a world not built for your neurotype, but also one that might not be inclusive of your identity. People in the community call it "minority stress," right?
Jamie: Yes, and it’s linked to much higher rates of anxiety and depression. There’s also a real frustration in the community about how they’re treated by healthcare providers—this idea of "infantilization," where doctors assume autistic adults aren't sexually active or don't need age-appropriate screenings. It’s a double layer of being misunderstood.
Aaron: It feels like the recurring theme here is that we’ve been ignoring the "adult" side of these differences for too long. Which brings me to ADHD. I’m hearing more and more about people in their 60s and 70s suddenly realizing they’ve had ADHD their whole lives.
Jamie: It’s becoming very common. The challenge is that at that age, ADHD symptoms—like forgetfulness or trouble planning—can look a lot like normal aging or even early dementia. For women, menopause is a huge factor. When estrogen levels drop, it actually makes the brain less sensitive to dopamine, which can make ADHD symptoms that were manageable for decades suddenly feel overwhelming.
Aaron: I’ve heard it described as "Swiss cheese memory." You’re fine one minute, and then there’s just a hole. But I also read that there's a lot of hesitation from doctors to treat seniors with the usual medications.
Jamie: There is, mostly due to concerns about heart health. But the recent data is actually quite reassuring—stimulants haven't shown a significant link to cardiovascular disease in older populations when managed correctly. And it’s not just about focus; it’s about quality of life. Some people find that proper treatment allows them to return to hobbies or goals they gave up on years ago.
Aaron: There was also a study about a link between ADHD and Lewy body dementia, wasn't there? That sounds a bit scary for someone getting a late diagnosis.
Jamie: It’s a correlation that researchers are watching. One study found that nearly half of adults with Lewy body dementia had ADHD symptoms earlier in life. It doesn't mean one causes the other, but it suggests that ADHD might be an early indicator of how certain brains age. It’s a reason to seek evaluation, not to panic. Understanding your brain’s baseline early on helps doctors spot when something else might be changing.
Aaron: That baseline is so important. It reminds me of the discussion about depression in non-speaking autistic adults. If you can’t easily say "I’m sad," how does anyone know?
Jamie: That’s a very vulnerable group. A survey of parents found that while 40 percent suspected their non-speaking adult children were depressed, only 7 percent had a professional diagnosis. The key is looking for shifts in that baseline—changes in sleep, eating, or even an increase in repetitive behaviors. It’s often dismissed as "just part of being autistic," but parents are saying, "No, this is a change in who they are."
Aaron: It really highlights the need for better tools for everyone, no matter how they communicate. And speaking of safety and communication, we have to touch on the water safety issue. It’s a heavy topic, but for families with autistic children, it’s a constant worry.
Jamie: It is. The risk of drowning is significantly higher because of the tendency to wander, or "elope." Experts are really pushing for "layers of protection"—not just fences and alarms, but things like using social stories or AAC devices to explain the difference between a pool and a bathtub. And adapted swimming lessons that respect sensory sensitivities, like the smell of chlorine or the feeling of goggles.
Aaron: It’s about meeting the child where they are. Whether it’s water safety, a late-life ADHD diagnosis, or understanding brain structure, it feels like the message is the same: we have to look past the surface and the old stereotypes.
Jamie: I agree. The more we move toward identity-first language and respect the lived experience of these individuals, the better our science and our support will become. There is still so much uncertainty, but we are asking better questions now.
Aaron: Well, that feels like a good place to wrap up today’s conversation. We’ve covered a lot of ground, from the "mirage" of IQ to the importance of specialized care as we age.
Jamie: It’s a lot to process, but it’s all part of a larger, more human picture of neurodevelopment.
Aaron: If you’d like to dive deeper into any of the studies or reports we mentioned today, you can find the summaries and original links on our episode page. Thanks for listening, and we’ll talk to you next time.
Jamie: Goodbye, everyone.
References
- IQ’s link to brain structure, function in children may be a mirage
- Mechanisms by which noncoding RNAs like PTCHD1-AS contribute to altered brain development
- Inside the Aging ADHD Brain
- A Critical Need Ignored: Inadequate Diagnosis and Treatment of ADHD After Age 60
- Adults with ADD: Is Dementia in Your Future?
- Free Guide to ADHD in Older Adults
- Ten Takeaways From 10 Years of Studying Autism
- Researchers Examine the Stress of Being Autistic and LGBQ+
- Identifying Depression in Autistic Adults with Limited or No Speech
- Water Safety Tips for Children with Autism
- Adults who identify as LGBTQIA+ report higher rates of masking autistic traits
- What Makes Me Autistic? Shepard's Journey to Understanding
- Research Study: Sexual orientation in neurodivergent and neurotypical individuals
- Research Match Summary Report: Sexual identity and mental health in autistic adults
- SPARK Snapshot: Autistic Adult Participants Identity Study
- Sexuality and Relationship Education (SRE) Webinar Recording