Today’s Living on the Spectrum explores the neurological mechanisms underlying ADHD and practical strategies for supporting neurodivergent learners in STEM education.
The Neuroscience of the ADHD Brain
Chemical Drivers of ADHD
ADHD is a biological condition linked to deficiencies in specific neurotransmitters, particularly norepinephrine. These chemicals facilitate communication between neurons across synapses. Impaired activity typically occurs in four brain regions: the frontal cortex, which manages executive functions; the limbic system, which regulates emotions; the basal ganglia, which coordinates internal communication; and the reticular activating system, a major relay center. Stimulant medications increase norepinephrine synthesis, while nonstimulants slow its breakdown to normalize function.
The Intersection Model
The prefrontal cortex (PFC) acts like a busy traffic intersection without signals. In this model, thoughts and emotions are "cars" where the most immediate stimulus gains control. This lack of signaling causes attention to wander and makes time management difficult. Immediate emotions often override logical judgments of time. Many individuals develop internal hyperactivity or anxiety as a tool to keep important thoughts in focus.
Motivational Differences
Dr. William Dodson explains that the ADHD nervous system regulates attention and emotions differently than neurotypical systems. While most people can prioritize tasks based on importance, the ADHD brain often fails to respond to standard motivational triggers. Success requires understanding these neurological differences rather than attempting to conform to neurotypical standards of productivity.
Managing Stimulation with a Dopamine Menu
Structuring Reward Options
Jessica McCabe and Eric Tivers suggest using a "dopamine menu" to separate activity planning from the moment of choice. "Appetizers" are quick tasks like yoga stretches. "Entrées" include time-consuming hobbies or exercise. "Sides" provide background stimulation, such as white noise or body doubling. "Desserts" are high-stimulation activities that are difficult to stop, such as social media.
Community Recommendations
Community members suggest adding bird watching or singing along to music as Appetizers. Using instrumental soundtracks or audiobooks as Sides can make mundane tasks more engaging. Effective implementation involves prepping "ingredients" by keeping tools like musical instruments visible while creating barriers to "desserts," such as deleting social media apps from mobile devices.
Clinical Considerations
Lower-than-average dopamine levels often lead to cycles of "doom scrolling" or overeating as the brain seeks stimulation. If an individual struggles to find enjoyment in any menu activities, experts recommend medical consultation to screen for depression.
Inclusive STEM Education Strategies
Classroom Environment Adjustments
Students with ADHD, dyslexia, or dyscalculia often face barriers in STEM due to abstract concepts and sensory overload. Educators can provide flexible seating and noise-reducing headphones to manage sensory sensitivities. During hands-on activities, assigning clear roles and offering sensory tools like gloves helps students stay regulated. Instructions should be provided in both verbal and written formats, supplemented by checklists.
Literacy Support in Science
Literacy skills are essential for reporting scientific findings, but students with writing challenges often struggle with traditional reports. Universal Design for Learning (UDL) allows for alternatives like read-alouds, videos, or digital projects. Specific strategies include pre-teaching vocabulary with visual aids and using graphic organizers to map cause-and-effect relationships. Sentence starters and science journals help students organize thoughts without the frustration of rigid writing formats.
Universal Design for Learning
UDL removes learning barriers by offering multiple ways for students to engage with material and demonstrate knowledge. This approach includes providing "chunked" information to reduce cognitive load. Assessments should remain flexible, offering extended time or alternative formats like oral explanations or video presentations to accurately measure student understanding. Inclusion of success stories from neurodivergent STEM professionals helps students see themselves in future technical careers.
Podcast Transcript
Aaron: Hello everyone, welcome to the podcast. I am Aaron.
Jamie: And I am Jamie. Glad to be back with you all.
Aaron: You know, Jamie, I was talking to a friend the other day whose son was recently diagnosed with ADHD. She told me she felt this strange mix of relief and total overwhelm. Relief because there was a name for it, but overwhelm because she kept hearing it’s "biological," which sounds so heavy and fixed. It’s like, what does that actually look like inside a person's head?
Jamie: I think that’s a really common starting point. When we hear "biological" or "neurodevelopmental," it can feel like a life sentence or something very rigid. But really, it’s about how the brain communicates with itself. There’s some interesting research into the specific chemicals, like norepinephrine and dopamine, that act as messengers. In an ADHD brain, these messengers are just a bit less active in key areas—like the parts that handle planning or managing emotions.
Aaron: So it’s less like something is "broken" and more like the Wi-Fi signal is just really spotty in certain rooms of the house?
Jamie: That’s a great way to put it. The signal is weak in areas like the frontal cortex, which is your "manager," or the limbic system, which handles your feelings. And because the signals aren't getting through consistently, the brain has to find other ways to keep up.
Aaron: That actually connects to something I read recently called the "Intersection Model." It described the ADHD brain like a busy city intersection where the traffic lights have gone out.
Jamie: Exactly. If you imagine thoughts and emotions as cars, without those lights, the fastest or loudest car—the most immediate thought—just zooms through and takes over. It’s why someone might be right in the middle of a task, but then a sudden worry or a new idea "speeds" through, and the original task is just... gone.
Aaron: I can see how that would be exhausting. It’s not that the person doesn't care about the task; it's just that the "car" carrying the task got cut off by a flashier one. And I’ve noticed people mention they feel they have to be "on edge" or anxious just to stay focused. Is that part of it?
Jamie: It often is. Some people subconsciously use anxiety or internal hyperactivity as a sort of "manual traffic controller." They keep themselves in a state of high stress because that shot of adrenaline helps the traffic flow. But as you can imagine, living in that state 24/7 leads to some serious burnout and sensitivity.
Aaron: Speaking of stress, I’ve also heard that people with ADHD often get a lot more negative feedback throughout their lives. Like, "Why can't you just sit still?" or "Why did you forget this again?"
Jamie: Right, and that builds up. Over time, the brain can become hypersensitive to what looks like criticism. A neutral question from a partner, like "Did you do the dishes?" can feel like a massive attack because the history of "not being enough" is so heavy. It’s why understanding the biology is so helpful—it shifts the conversation from "why are you lazy?" to "how can we get the traffic lights working?"
Aaron: I love that shift. But even when you know why it's happening, the "how" of getting things done is still the big hurdle. I saw this concept of a "Dopamine Menu" being discussed. It sounds like something you’d see at a cafe.
Jamie: It’s a very practical tool. Since we know the ADHD brain is often looking for dopamine—that "reward" chemical—it tends to go for the easiest, fastest hit, like scrolling through social media for hours. A Dopamine Menu helps you plan ahead for when your "brain traffic" is messy and you can't think clearly.
Aaron: So instead of just "doom scrolling," you have a list of options ready to go? How do you actually set that up?
Jamie: They break it down into courses. "Appetizers" are quick 5-minute boosts, like a quick stretch or singing a song. "Entrées" are bigger activities, like a hobby or a workout. Then you have "Sides," which are things you do while working to keep the brain stimulated, like listening to white noise or having a friend sit in the room with you—something people call "body doubling."
Aaron: And I'm guessing "Desserts" are the things that are fun but you can easily overdo?
Jamie: Exactly. Like video games or social media. They aren't "bad," but the idea is to build "barriers" to them, like deleting the app so you have to consciously think before you jump in. The goal is to make the healthy stuff easier to access—like keeping your guitar where you can see it—and the "junk food" stuff just a little bit harder to reach.
Aaron: That makes so much sense for adults, but I keep thinking about kids in school. Especially in subjects like math or science where everything feels so abstract and you have to follow a very specific path. That seems like a nightmare for a "busy intersection" brain.
Jamie: It can be. In STEM education, we’re seeing a move toward something called Universal Design for Learning, or UDL. The idea is that instead of making the student change, we change how the information is delivered. So, instead of just a long lecture, you use visuals, you "chunk" the information into tiny pieces, and you give the kids checklists so they don't lose their place.
Aaron: "Chunking" feels like a life skill, honestly. Not just for kids.
Jamie: Truly. And it’s about removing the barriers that aren't actually about the science. For example, if a student has trouble with writing, why force them to write a 5-page lab report if they can explain the experiment perfectly through a video or a diagram? We want to know if they understand the science, not how well they can struggle with a pencil.
Aaron: I wish I had that in school. It feels like it would take the "shame" out of learning. It’s more like, "Here are three different ways to get to the destination, pick the one that fits your car."
Jamie: Precisely. And by using things like "when-then" sentences—like, "When you finish this drawing, then we can go for a five-minute brain break"—it provides that structure the brain is missing. It helps build a "growth mindset" where the kid feels like they actually can improve, rather than feeling stuck.
Aaron: It also seems really important for these kids to see that they aren't the only ones. I saw a mention of highlighting neurodivergent professionals in STEM.
Jamie: That representation is huge. When a student who struggles to sit still sees a successful engineer or a scientist who says, "My brain works just like yours," it changes their entire trajectory. It stops being a "disorder" and starts being a "different way of processing" that has its own unique strengths.
Aaron: I think that’s a perfect place to wrap up today. It’s about that balance—respecting the real biological challenges while finding those "traffic lights" and "menus" that make life work.
Jamie: It really is. It’s a process, and there’s no one-size-fits-all answer, but understanding the "why" makes the "how" feel a lot more manageable.
Aaron: Well, thanks for chatting this through with me, Jamie. I feel a bit more equipped for my next conversation with my friend. For those listening, you can find the summaries of the research and the articles we discussed today, along with the original links, on our episode page or our website.
Jamie: Thanks for listening, everyone. Take care.
Aaron: See you next time.
References
- ADHD Neuroscience 101
- Everything You Never Knew About the ADHD Brain
- Unraveling the Mysteries of Your ADHD Brain
- Using a Dopamine Menu to Stimulate Your ADHD Brain
- STEM classroom accommodations for students who learn and think differently
- Literacy strategies for STEM education: How to support reading and writing in science and math
- Strategies to make labs, lessons, and activities more inclusive for every kind of learner