When Kids Act Out: What Brain Science Reveals About Hyperactivity, Defiance, and Emotional Outbursts

“I don’t want to, I don’t waaant to!” the seven-year-old screams, stamping his feet.

“You climbed on the closet again? What are you looking for up there near the ceiling?” the exhausted mother asks.

“You didn’t get one for me!” whines the six-year-old — and once again you find yourself facing a draining scene of tears, with no energy left.

Have you also found yourselves standing helplessly in front of your children’s challenging behaviors? Have you, too, lost your patience? Is that feeling — of trial and error, of repeating every possible mistake, familiar to you?

“It all starts in the brain,” says Racheli Langford, a brain researcher and medical psychologist from London. Langford manages the London branch of the Galim Clinic for brain training and cognitive enhancement, serves as a scientific advisor, and heads the research department of Neuroedit, a company developing breakthrough technology for cognitive improvement in cases of Alzheimer’s and brain injury.

Langford suggests a shift in perspective: “When we look deeply into brain activity in children, we can see not only how a child thinks and learns, but also understand how their inner world works — why they hit, seek more attention, are hyperactive, deliberately do things that annoy everyone, or even why they still wet the bed.”

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Stimulating the Brain

Racheli agreed to share key insights into what can be seen in the brains of children with attention or behavioral challenges. So what actually happens in the brain of a child who can’t concentrate or sit still?

“What do we parents and teachers tend to say — or at least want to say, to a hyperactive child?” Racheli asks, and answers: “Sit still. Calm down. Stop. Freeze.”
It seems as though the child’s brain is over-aroused and needs to be calmed. “In reality,” she emphasizes, “it’s exactly the opposite.”

Imagine the brain has a battery — like a car battery, that can recharge itself, but not always efficiently. Now imagine that battery is almost empty. So empty that if the car (or the brain) stops for a moment, it won’t be able to restart right away.

“There is such a battery in the brain,” she explains. “It’s called the sensorimotor rhythm. The lower it is, the emptier the battery. And the emptier it is, the harder the child has to fight to stay awake and function during the day. So they must keep moving, because the brain knows — often without the child being aware of it at all, that if they stop for even a moment, they’ll completely shut down, fall asleep, or lose the energy to continue.”

In other words, the more a child is running on an empty battery, the more hyperactive they appear. And the more we recharge the brain, the calmer the child becomes. Stimulant medications like Ritalin aim to stimulate.

“Stimulate a hyperactive child?” she smiles. “Yes, exactly — neurologically.”

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How Do You Stimulate the Brain?

“That’s the million-dollar question,” Langford nods.
One option is medication — the route most people know. While medication is often effective while it’s active in the bloodstream, once it wears off, you’re back to square one.

“The alternative,” she says, “is to teach the brain how to raise the sensorimotor rhythm on its own. Once it learns, it knows how to do it for life. Instead of telling a hyperactive child to stop, let’s recharge them.”

It may sound like magic, but Langford explains: One way to do this is by increasing dopamine production in the brain. There are several ways to do that:

• Positive feedback. When we focus on what a child does well and sincerely praise them, dopamine levels rise. Reward equals dopamine.

• Physical activity and hands-on work.

• Nutrition. Certain foods boost dopamine production. Without going into too much detail, the main category to focus on is protein. The more protein a child consumes, the more building blocks they have for producing dopamine — and the less sugar they’ll crave. A double win.

There’s also a way to train the brain to shift desired frequencies in targeted regions, directly influencing brainwave activity. This is what allows the brain to independently increase the sensorimotor rhythm.

“That’s what I do every day with children and adults in my clinic,” Langford explains. “Each person trains the patterns they need. Our method — Langford Brain Training, was developed by my late mother, Yael Langford, who was also a brain researcher.”

The broader field is called neurofeedback, or brain pattern training. “It’s crucial to say,” she cautions, “there are many methods in this field, and many practitioners who don’t come from neuroscience backgrounds. Unfortunately, I’ve seen charlatans promising miracles. You must be extremely careful about who you entrust with your or your child’s brain.”

(Not) Against Rebellion

Langford notes that defiance can have multiple neurological causes, and each brain must be mapped individually.

“In children with ADHD, genetic studies show low dopamine levels in the frontal brain. On top of that, they often have excess amounts of the enzyme that breaks dopamine down. Their brains are desperate for dopamine.”

How does a child get dopamine — even briefly?

Through attention. Attention equals reward equals dopamine. “That’s why a child may do something that draws attention, even negative attention,” Langford explains. If a child knows a behavior will annoy everyone, the cost may be yelling — but the gain is that everyone looks at them. That’s a dopamine hit.

Understanding this lets parents act strategically: Give positive attention rather than negative. Reward desired behaviors before rebellion erupts. During difficult moments, avoid excessive attention.

Many parents tell Langford that when the child is alone with them — even for an hour, the hyperactivity disappears. “Now we understand why,” she says. “Because in that moment, the child is getting dopamine in abundance.”

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Who’s Afraid of Change?

Sometimes the brain’s ability to adapt to a changing environment doesn’t function efficiently. The filtering system that decides what information to focus on gets overwhelmed. Relevant and irrelevant information flood in, and the brain collapses.

“This is common in children on the autism spectrum,” she explains. To parents, it looks like rebellion: crying, resisting new plans, panicking over surprises, or becoming aggressive.

“The child is overwhelmed and doesn’t know how to organize what’s happening around them,” Langford says. Blaming the child only worsens the meltdown, because they genuinely don’t understand why they’re reacting this way.

Children with ADHD experience this doubly: change requires focus, organization, and adaptation, which are already challenging skills for them. Unconsciously, they sense the demands will exceed their brain’s capacity, and anxiety kicks in.

What helps?

• Talk about changes in advance.

• Explain what will happen and why, in age-appropriate language.

• Invite the child to suggest ideas.

• Change one thing at a time; keep everything else familiar.

• Break changes into stages.

• Expect emotional resistance — and respond with compassion.

Neurofeedback can also help. Langford has seen children who initially couldn’t handle even five-minute plans eventually learn to adapt, discuss changes calmly, and even suggest improvements themselves.

The Chronically “Wronged” Child

“It’s not fair! Why didn’t I get one? You love him more than me!”

Some children always feel deprived, no matter what they have. “When this becomes a pattern,” Langford explains, “we see it in brain activity too — more slow alpha waves on the left side of the brain. The left side is action-oriented; the right is thinking. When the action side is too slow, the world is perceived negatively, regardless of reality.”

Again, dopamine plays a role. Chronic complaints often signal a need for attention.

“Instead of engaging with the complaint itself,” Langford advises, “focus on the form — it’s a request for connection.”

She also suggests parents ask themselves:

• Do I sometimes model similar behavior?

• Why does this trigger me so strongly?

• What can I change in myself?

She offers a simple daily exercise:
Ask each other:

• What made you happy today?

• What positive thing can you say about Dad tonight?

This actively trains the brain to seek and verbalize the positive.

If the issue is neurological, does that mean the child has no responsibility? Should we expect nothing from them?

“The first step,” Langford concludes, “is understanding and containment, even at the brain level. When we realize the child isn’t bad, isn’t doing this on purpose, and is often trapped in a reaction their brain chose based on the tools it has, we respond with more forgiveness and less anger.”

Practically, the goal is to enlist the child as a partner in helping their brain function better. Instead of demanding explanations or justifications, reflect to the child that this is something their brain hasn’t learned yet, but can learn.

“It’s amazing,” she says, “how, with the right approach, children step up with responsibility instead of giving up in frustration — because finally, someone understands them.”