A Simple Brain Model for Overthinking and Rumination

There is something strangely comforting about opening the user manual for a new piece of technology.

You discover features you didn't know existed. Hidden capabilities. Shortcuts. Possibilities. And every time I do that, I find myself thinking the same thing:

Why didn't the human brain come with one?

Because for most of us, we spend decades living inside our minds without ever being taught how they work. Then we wonder why intrusive thoughts, anxiety, overthinking, and rumination seem to take over.

The truth is, your brain is not broken.

In many cases, it's doing exactly what it was designed to do. One of the simplest ways I've found to understand the brain is through a three-part model.

Imagine a top brain, a middle brain, and a bottom brain.

The middle brain is where repetitive, intrusive, and invasive thoughts tend to live. These are the thoughts that keep replaying conversations, reminding you of unfinished tasks, or dragging your attention back to something that happened years ago.

Most of us have been taught to fight these thoughts.

Ignore them.

Suppress them.

Distract ourselves from them.

But here's the interesting part…

The more we push them away, the louder they often become. It's not unlike a person who keeps repeating themselves because they don't feel heard.

Eventually, those repeated thoughts trigger alarm signals deeper in the brain.

The nervous system begins preparing for danger.

The body shifts into survival mode.

And when survival mode takes over, the parts of the brain responsible for critical thinking, rational decision-making, empathy, intuition, and self-awareness become less accessible.

This is why trying to "think your way out" of stress often doesn't work.

The very part of the brain you're trying to use has temporarily stepped offline. This is where awareness becomes incredibly powerful.

Not because awareness magically eliminates thoughts. But because awareness changes your relationship with them.

The moment you notice a thought instead of becoming consumed by it, you create space.

You become the observer. And from that place, something fascinating begins to happen.

The thought starts feeling heard.

Neuroscience tells us the brain is capable of change throughout our lives. This process, known as neuroplasticity, means our mental patterns are not fixed.

Every moment of conscious awareness creates an opportunity for rewiring.

The goal is not to eliminate thinking. The goal is to become curious about it.

I often remind clients that thoughts are a lot like people. Most simply want to be seen, heard, witnessed, and understood. Once they are, they often lose the need to keep shouting.

This is where one simple question can completely change the game:

"Is there anything for me to do about that right now?"

It's deceptively simple.

But it cuts through mental clutter remarkably fast.

Sometimes the answer is yes.

Maybe you've been thinking about sending an email, making a phone call, scheduling an appointment, or taking out the garbage.

The action resolves the thought because the message has been received.

Other times the answer is no.

Maybe you're replaying a conversation from six months ago.

Maybe you're revisiting a mistake that cannot be changed.

In those moments, recognizing there is nothing to do right now can create immediate relief.

Not because the thought disappears instantly. But because you've stopped treating it like an emergency.

And that shift matters.

One of the biggest misconceptions about intrusive thoughts is that they are trying to make us feel bad. Often, they're simply trying to communicate. Sometimes they need action. Sometimes they need attention. Sometimes they just need permission to pass through.

Awareness is often enough.

Curiosity helps.

Action, when appropriate, helps even more.

And over time, these small moments of conscious engagement become a top-down approach to rewiring the brain.

The result isn't perfection.

It's greater clarity. Better decisions. A stronger connection to intuition. And a mind that feels less like a battlefield and more like a trusted advisor.

If this resonated with you, I'd love to hear from you.

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