As we go through life, our brains run different processing modes. Some – the attention and sensory systems – result in very similar experiences of the world: what colour the sky is, how warm the day feels.

But there is another, deeper side to the brain which weaves together your memories, goals, beliefs and emotions into a continuous sense of self. This allows you to experience the world not as it is, but as it matters to you personally.

This unique inner world is supported by the brain’s default mode network (DMN). This links together several areas including in the prefrontal cortex (at the very front of the brain) and the parietal lobe (at the back).