Scientists Just Confirmed What I’ve Been Saying for Thirty Years About the ADHD Brain

And boredom, for the Hunter brain, is not a character flaw. It is a physiological state, as real and as measurable as hunger.

Last month, researchers at Monash University published a study in the Journal of Neuroscience that I found myself reading with a strange mixture of vindication and amusement.

The study found that people with ADHD, even while fully awake and attempting to complete tasks, experience brief episodes in which the brain slips into something that looks exactly like sleep. These micro-episodes of sleep-like neural activity, the researchers found, were directly correlated with attention lapses, slower reaction times, and increased errors.

The study’s author, Elaine Pinggal, explained it this way:

“Sleep-like brain activity is like going for a long run and getting tired. The brain gets fatigued and briefly disconnects from the task at hand.”

That’s a fine explanation as far as it goes. But it doesn’t go nearly far enough, because what the neuroscience community is circling around with increasing urgency is something I first wrote about in the early 1990s: the ADHD brain is not broken. It is bored.

And boredom, for the Hunter brain, is not a character flaw. It is a physiological state, as real and as measurable as hunger.

Here is what I wrote in my book on Adult ADHD, describing what was then a fairly controversial theory:

“People with ADHD behave the way they do because their brains are chronically under-aroused. While from the outside the person with ADHD may look hyperactive or scattered, on the inside the experience is one of drifting. Slipping away. The sensation of consciousness receding.

“And in response to that, the person does what any sensible organism does when it’s sinking: it lurches upward toward wakefulness. It creates a crisis, makes an inappropriate joke, starts a fight, jumps up and paces around. Not because it’s overstimulated, but because it’s desperate for stimulation.”

The Monash University study is describing the same phenomenon from the inside of a brain scanner. The ADHD brain, during what should be a focused task, is intermittently switching into sleep mode.

Not because the person is lazy or unfocused by choice, but because the neural architecture that keeps the brain engaged at low-arousal tasks simply isn’t firing the way it does in a neurotypical brain.

Now think about that from the evolutionary perspective that is the foundation of the Hunter/Farmer model.

The Hunter, moving through a forest ten thousand years ago, did not need sustained attention during the long stretches between prey. Sustained attention on a static landscape is actually counterproductive for a Hunter, because it narrows focus to the point where peripheral threats go unnoticed.

What kept the Hunter alive during those long, uneventful stretches was the ability to enter a kind of semi-vigilant open awareness, scanning broadly, staying alert to novelty rather than locked onto any one thing.

The brain that could do that, that could let consciousness expand and drift and scan instead of bearing down on a single point, was the brain that caught the flicker of movement in the tall grass before it became a problem.

The sleep-like brain waves that the Monash researchers measured in ADHD adults during boring tasks are not malfunction. They’re the Hunter’s ancient environmental scanner, still running as designed, still broadcasting at the frequency it evolved for, inside a world of fluorescent lighting and Excel spreadsheets and thirty-minute meetings about next quarter’s deliverables, a world it was never built for and has no idea how to interpret.

What happens to that same brain in a genuinely stimulating situation? Every parent of a child with ADHD already knows the answer. The video game. The creative project. The crisis. The thing the child has been passionately interested in for the last three weeks.

The sleep-like neural static vanishes and is replaced by something that researchers call hyperfocus: a state of attention so intense and so sustained that it is, in many ways, the mirror opposite of what anyone would expect from someone diagnosed with an attention deficit.

There is no deficit. There is selectivity. The Hunter’s brain has not lost the ability to pay attention. It has instead preserved, perfectly, the ability to pay exactly the right kind of attention for exactly the right circumstances, and it is simply waiting for circumstances worthy of paying attention to.

What the Monash study adds to this picture is the elegant detail of mechanism. We can now see, at the level of brain activity, the moment the Hunter’s mind decides the present environment isn’t worth full consciousness.

We can watch it slip into that scanning, semi-aware, open-monitoring state that served our ancestors so well and serves the Farmer’s world so poorly.

I suspect the researchers will keep finding things like this. The science is doing what science does: catching up to what many of us who actually live in these brains have known for a very long time.

As TIME Magazine wrote in the headline of their 1994 article about my first book on ADHD and its hypothesis: “Hail to The Hyperactive Hunter!”