One of the biggest myths about the brain is that bigger is always better. But what about those who sit on the extreme end of that scale?

How much of our brain do we actually need to survive?

Looking through the archives of medical history, there are a number of people with tiny brains, or brains with huge chunks missing entirely, which defy all odds.  

In a 2007 Lancet study, doctors described an incredible medical oddity – the 44-year-old civil servant who had lived a normal life despite having an incredibly tiny brain. The French man went into hospital after he experienced weakness in his left leg for two weeks. Doctors were quite surprised when they took scans of his brain and found a huge fluid-filled chamber.