The Neuroscience of ADHD: A Beginner’s Guide

By Ian Anderson Gray with Jonathan Hassall

Smart ADHD Podcast

Episode 18

Duration: 30 minutes 42 seconds

Episode Theme: Expert

Full Transcript

October 24, 2024

Jonathan Hassall

Do you ever feel like your brain is running a million miles an hour while your body just wants to take a nap?

Have you wondered why managing emotions can sometimes feel like trying to juggle flaming torches?

Are you curious about how to turn your ADHD traits into superpowers rather than stumbling blocks?

In this episode of the Smart ADHD Podcast, I'm thrilled to have Jonathan Hassall, a seasoned ADHD and executive function coach, join me. We’re diving deep into the neuroscience of ADHD, exploring how our brains work, particularly focusing on dopamine, the prefrontal cortex, and practical strategies for success. Jonathan’s insights are not just academic; they’re rooted in real-world applications that can help you embrace your unique neurodiverse traits.

In this episode:

  • [0:00] – Understanding ADHD: We’re Not Broken, Just Inconsistent
  • [0:38] – Introduction to the Smart ADHD Podcast
  • [1:46] – Meet Jonathan Hassall: ADHD Expert and Coach
  • [2:17] – The Neuroscience of ADHD: Exploring Brain Functions
  • [4:06] – Dopamine and ADHD: The Role of Neurochemistry
  • [5:22] – The Prefrontal Cortex and Executive Function
  • [16:46] – Default Mode Network vs. Task Positive Network
  • [24:26] – Fight or Flight: ADHD and the Nervous System
  • [28:35] – Final Thoughts and Encouragement

Understanding ADHD Beyond Behaviours

ADHD has long been understood by observing behaviours, but Jonathan Hassall explains that if we really want to make positive changes, we need to look deeper. While behaviours help with diagnosis, they don’t explain the reasons behind the condition. By understanding the neurological mechanisms at play, we can better tailor interventions—whether medical or behavioural—to address those underlying mechanisms and help people manage ADHD more effectively.

“If we can understand the mechanism, then we can perhaps start seeing how we could influence those mechanisms to get better outcomes for ourselves.”

Inconsistent, Not Broken

Jonathan emphasizes that people with ADHD aren’t broken—they’re just inconsistent. It’s not that those with ADHD can’t focus, regulate emotions, or stay organized. They can do all these things, but the challenge lies in the fact that these abilities don’t always work reliably.

“It’s not that we can’t focus. It’s not that we can’t direct emotion. It’s not that we can’t organize working memory. It’s just that it doesn’t happen reliably.”

This inconsistency is what makes day-to-day life with ADHD unpredictable and frustrating.

ADHD Runs in Families

Jonathan explains that ADHD is highly hereditary. Research shows that ADHD is one of the most inheritable traits, similar to how height is passed down. This genetic link can help people understand that ADHD isn’t something you just “get”—it’s part of your biological makeup, passed down through generations. Knowing this can help reduce stigma and make it easier to identify within families.

Dopamine and ADHD

Dopamine is a key player when it comes to understanding ADHD. Jonathan explains that while other brain chemicals are involved, dopamine stands out because of its strong connection to attention, focus, and emotional regulation.

“Dopamine is a really interesting neurochemistry… it gives us a very neat target for change.”

When dopamine levels are low, it becomes difficult for people with ADHD to focus, control emotions, or organize their thoughts. Jonathan compares this to what it feels like for anyone who hasn’t slept well or is extremely stressed.

“If you want to see someone who’s got poor dopamine availability, pick someone who’s been up all night… they’re running on low fuel,” Jonathan explains.

For those without ADHD, these dips in dopamine usually have clear causes, like lack of sleep or hunger. But for people with ADHD, these fluctuations can happen frequently and without a specific reason, making it much harder to manage.

Balancing Focus and Excitement

Dopamine doesn’t just affect attention—it also impacts how excited or engaged we feel. Jonathan highlights how too much excitement can be as problematic as too little, and that the ability to shift focus is important for balance.

“Bad things happen when we’re too excited, right? But also good things can happen when we’re appropriately excited.”

In ADHD, finding this balance can be difficult. People may become hyperfocused on one task or easily distracted from many. This constant fluctuation makes it harder to maintain control over emotions and focus.

The Cycle of ADHD and Lifestyle

ADHD often leads to a cycle where poor self-regulation impacts lifestyle choices, such as not getting enough sleep, eating poorly, or feeling overly stressed. These habits then further reduce dopamine levels, worsening ADHD symptoms.

“We have behavioural habits because of our poor self-regulation that further impact it.”

This creates a vicious cycle, where poor lifestyle choices make it harder to manage ADHD, and ADHD makes it harder to make healthy choices. For people without ADHD, dopamine levels are more consistent, making it easier to develop routines and systems to self-regulate.

The Role of the Prefrontal Cortex in ADHD

Jonathan explains that the prefrontal cortex is the part of the brain located right behind the forehead, and it plays a big role in directed attention. It also helps us visualize and imagine things, like object permanence. But when it comes to ADHD, the prefrontal cortex is most often discussed in the context of attention and focus.

As we move further back into the brain, we reach areas more involved in emotion. Jonathan explains that there’s a crossover between attention and emotion regulation in the brain, which is thought to be the basis of executive function. This model helps us understand how people regulate their behaviour, though it’s still a theoretical model.

“Executive function is a theoretical model. We don’t know that there’s an executive function brain or part of the brain.”

The Link Between Emotion and Attention

Jonathan brings attention to the fascinating relationship between emotional and attentional regulation. He points out that to better understand this link, we need to consider modern research on emotions. For example, Lisa Feldman Barrett’s work is reshaping how we think about emotions, which might give us new insights into ADHD.

As we start to think about the brain in new ways, Jonathan suggests shifting away from thinking of the brain as having fixed “centres” for emotions or attention. Instead, a neural network approach—looking at how different areas of the brain work together—might be more useful. This broader perspective allows for a better understanding of how behaviours can be influenced.

Exploring Neural Networks

Jonathan explains that research into neural networks offers a fresh perspective on how the brain works. Rather than focusing on individual parts of the brain in isolation, neural networks look at how different areas communicate during different tasks. This approach is supported by technologies like functional MRIs, which allow us to see how the brain functions in real-time while performing tasks.

“We can actually see the electrical functionality of the brain as it’s working,” Jonathan says. This lets researchers observe which areas of the brain light up during specific tasks and in what order.

The Default Mode Network

One key neural network Jonathan mentions is the default mode network, which is responsible for processing our surroundings when we’re not actively focusing on a task. It’s tied to memory, emotion, and the amygdala, which was once thought to be the brain’s “fear centre” but is now considered a “contrast centre.” This shift in thinking helps us understand that the amygdala’s job is to notice what stands out in our environment, which could be either a potential threat or an opportunity.

Jonathan gives an example:

“If I’m walking around and hear a throaty V8 engine roar, it alerts me that something out of the ordinary is happening. Then, I quickly decide—is this something I want to move towards or away from?”

The brain uses memories and past experiences to determine whether something is a threat or an opportunity. This fast, instinctual process is essential for survival, but it can also be heavily influenced by trauma, conditioning people to react to certain stimuli based on past negative experiences.

Switching From Default Mode to Task Positive

While the default mode network helps us process general surroundings, the task-positive network allows us to focus on specific details and tasks. Jonathan explains that transitioning from default mode to task-positive mode requires energy—and this is where dopamine comes into play. Dopamine needs to be available to activate attention.

“We need energy to turn on attention. In other words, dopamine.”

For people with ADHD, this process can be more difficult. While the default mode network is up and running, the task-positive network may struggle to fully activate, making it harder to focus. Jonathan shares that studies using functional MRIs suggest that, in people with ADHD, the default mode network stays active even when the task-positive network should take over. This could explain why those with ADHD often feel distractible, even when they’re trying to focus.

The Fight, Flight, Freeze (and Fib) Response

Jonathan also touches on the fight, flight or freeze response, a reaction to stress or perceived threats. Interestingly, his wife, Monica Hassall, an ADHD coach, proposed a fourth “F”—fib. Jonathan explains that when people with ADHD feel anxious or overwhelmed, they sometimes respond by telling small fibs. These aren’t manipulative lies but rather a way to cope with pressure or fear.

Jonathan says,

“They’re more like defensive misleadings or fabrications.”

This anxiety-driven response is common in people with ADHD, who often live with underlying anxiety without even realizing it. Jonathan recalls a client who, after a discussion, recognized for the first time that her constant worrying and pressure to act immediately was actually anxiety. Many people with ADHD feel a constant negative pressure on themselves, which is often tied to inconsistent dopamine availability, leaving them feeling out of control.

Using Anxiety as a Motivator

Jonathan observes that many people with ADHD, particularly intelligent women, use anxiety as a tool to activate themselves. They may set artificial deadlines or pressure themselves to act immediately, which temporarily boosts productivity. However, Jonathan cautions that while this approach can work for a time, it comes at a significant cost.

Jonathan explains,

“Women get very good at using anxiety as an activation tool… unfortunately, that doesn’t keep working, but it seems to be effective to a point.”

This strategy of self-threat can be damaging in the long run, leading to burnout and further reinforcing anxiety.

Moving from Potential to Action

Jonathan concludes by emphasizing that people with ADHD often have untapped potential. The key is learning to regulate behaviour more effectively and aligning actions with intentions.

“People with ADHD are nothing but unrealized potential. Even with the achievements you’ve had, there’s so much more to tap into.”

By learning to manage ADHD in a way that works with the brain’s natural tendencies, people with ADHD can unlock even greater potential and, most importantly, live a happy and rewarding life.

 

Resources

Watch Episode 18

KF

About Jonathan Hassall

Jonathan is an ADHD & Executive Function Coach and director of Connect ADHD Coaching, providing services internationally from Brisbane, Australia. His background includes psychiatric
services and as Scientific Advisor for ADHD in the pharmaceutical industry. Jonathan trained as an ADHD coach through the US and offers individual and group programs for people with ADHD. Jonathan is a regular speaker at national ADHD meetings in Australian and US. He has previously held roles as a board member of ADHD Australia and ADDA. He also co-authored “Decoding Doing - Solving ADHD & Procrastination” in 2023.

His current practice focuses on working with Adults and Couples with ADHD. His approach includes the translation of relevant executive function theory to facilitate individuals with ADHD
finding and embracing their “neuro-native” state supporting adaptation and realisation of potential.

Transcript

[0:00] Ian: Hello, welcome back to the smart ADHD podcast. Today, we're diving into a fascinating topic, the neuroscience of ADHD and joining me is the amazing Jonathan Hassall. This was such a fun conversation. He is an ADHD and executive function coach and director of connect ADHD coaching all the way from Brisbane, Australia.

[0:19] Jonathan has a wealth of experience in psychiatric services, ADHD coaching and even served as a scientific advisor for ADHD in the pharmaceutical industry. He's Also coauthored the book, decoding, doing solving ADHD and procrastination. So in this episode, we're unpacking the neurological side of ADHD.

[0:38] What is actually going on in our brains? Jonathan explains some words that you might've heard about before, such as, you know, the prefrontal cortex and how understanding the roles of. Dopamine and our brain's Networks And shed some light on some of our most common struggles We'll be exploring how these brain functions affect things like time management, anxiety and the fight or flight response and how medication can help manage those challenges.

Ian Anderson Gray

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