The 9 Energy Centres - Your Personal Power Grid

Human Design

20 Dec

Alright, let’s talk about those funky shapes on the Human Design chart—the 9 Energy Centres.

You’ve probably heard of the Chakras, right? Each one governs different aspects of your energy. Well, same deal here, except in Human Design, we’ve got nine Energy Centres instead of seven. (We’ll get to why that is in a bit).

So one thing I want to say before we dive into this post, I’m an Aussie and over here we spell Centre differently to the Americans. Center and Centre - both the same but different.

Your Energy Centres determine how energy flows through your body and how you experience the world—depending on whether they’re Defined (colored in) or Undefined (white). And, just like in the Chakra system, each Centre is linked to different aspects of your body and being.

Let’s break them down:

Human Design Centres_Jac Cunningham Design

The 9 Energy Centres & What They Do

🧠 Head Centre – The hub for inspiration and ideas. If you’ve got this Defined, you’re a constant source of mental energy. If it’s Undefined, you’re picking up and amplifying other people’s thoughts. (Pineal Gland)

🤯 Ajna Centre – Thinking, processing, conceptualizing. A Defined Ajna is like a reliable computer that runs the same way every time. Undefined? Your mind is a sponge, soaking up different perspectives. (Pituitary Gland, Neo Cortex, Visual Cortex)

🗣 Throat Centre – The hub of communication and manifestation. This is where thoughts become words (and where words turn into action). If Defined, you have a consistent way of expressing yourself. Undefined? You reflect the voices around you. (Thyroid, Parathyroid, Metabolism)

💖 Identity (G) Centre – Identity, love, and direction. A Defined G Centre means you have a solid sense of who you are. Undefined? You absorb and amplify different identities, which can feel confusing—but also makes you a chameleon of experience. (Liver, Blood)

💪 Will (Heart/Ego) Centre – Willpower, self-worth, and the material world. Defined? You have a consistent sense of value and motivation. Undefined? You might feel the need to prove yourself—but don’t fall into that trap. (Thymus, Stomach, Gall Bladder)

😢 Emotional Solar Plexus Centre – Emotions and feelings. Defined? You have a wave of emotions that rises and falls. Undefined? You absorb and amplify the emotions around you, which can make you super empathetic (or emotionally overwhelmed). (Kidneys, Bladder, Pancreas, Lungs, Prostate, Nervous System)

🛡 Spleen Centre – Instinct, intuition, survival. If Defined, you have a built-in radar for what’s safe and what’s not. Undefined? You might hold onto things (or people) longer than you should because fear feels unfamiliar. (Lymphatic/Immune System)

🔥 Sacral Centre – Life force, work energy, sexual energy. Defined? You’ve got a powerful motor that recharges as long as you’re doing what you love. Undefined? You don’t have consistent energy, so rest is key. (Ovaries/Testes)

⚡ Root Centre – Stress and adrenaline. Defined? You have a steady way of dealing with pressure. Undefined? You might feel constant pressure to move, act, or get things done—even when it’s unnecessary. (Adrenals)

Defined vs. Undefined: How Your Energy Works

Defined Centres

Your energy here is consistent and reliable.
It’s always “on,” influencing how you interact with the world.
You broadcast this energy to others.

Undefined Centres

These act like antennas, picking up energy from people and environments.
They amplify whatever energy is around them.
It’s not consistent—so don’t get too attached to how it feels day-to-day.

For example, if you have an Undefined Emotional Centre, you might absorb emotions from the people around you and experience them more intensely. But here’s the thing: those emotions aren’t yours. Recognizing that can be life-changing.

A Few Things to Know About Energy Centres

🔸 The colours don’t matter – The original chart colours (yellow, green, brown, red) were simply what The Voice gave Ra Uru Hu. The only thing that matters is whether a Centre is colored in (Defined) or white (Undefined). To make it easier to remember and learn I have allocated the chakra colours to the centres in my bodygraph charts, so all centres are different colours.

🔸 A Centre is Defined when a Channel connects it to another Centre. A Channel is made when two Defined Gates(one from each Centre) link up. If there’s no full Channel? That Centre remains Undefined.

🔸 No two charts are exactly alike. Even if two people have the same Defined Centres, the way those Centres expressenergy will be different based on the Gates and Lines within them.

But What About the Chakras?

Before 1781, humans operated on a 7-Centre system, aligning with the traditional Chakra system. But when Uranus was discovered in 1781, we underwent a major energetic shift.

The Heart Chakra split into the G Centre and the Will Centre.
The Solar Plexus Chakra split into the Emotional Centre and the Spleen Centre.

Why? Because humans evolved to be more complex—both emotionally and energetically. We’re not just here to survive anymore; we’re here to create, expand, and connect.