In a rare instance when a patient died while hooked up to brain monitors, doctors saw an increase in brain activity right before and after his heart stopped. 

The brain waves that surged were associated with dreaming, information processing, and memory recall. 

It confirms what we often hear when a patient is revived in cardiac arrest, that right before their heart stopped, they saw their life flash before their eyes.

 What happens in our brains in the moments before we die has puzzled scientists for centuries.

 While we have some evidence of our lives flashing before our eyes, there are still many questions. 

No one knows exactly why it happens. 

Some people think it's biology. 

Others believe it's spiritual. 

What we know for sure is that you can try to look away, pushing down all the uncertainty and pain. 

But your life will catch up with you in the end.