You may have heard the myth that humans use only 10% of their brains. That statement is patently untrue — most people use all of their brains, all of the time. But for people who have survived a stroke, traumatic brain injuries or brain resectioning surgeries, things do get less clear. In fact, many of these cases suggest that a person actually doesn't need 100% of their brain to live, or even to function normally.
So how much of your brain do you really need to survive?
