Shortly after death, some people’s brains are still active as though they are in a deep sleep, reports The Independent. 

In a study that noted the findings could lead to new medical and ethical challenges, doctors reported that they had seen “single delta wave bursts persisted following the cessation of both the cardiac rhythm and arterial blood pressure (ABP)”. The findings are reported in a new study published by a team from the University of Western Ontario.

Only one of the four people studied exhibited the long-lasting and mysterious brain activity, with activity in most patients dying off before their heart stopped beating. But all of their brains behaved different in the minutes after they died – adding further mystery to what happens to them after death.

Read more at independent.co.uk