As their brains develop, they begin to understand that this doesn't mean they're gone forever. Another really important function of the brain is balance. The semicircular canals are responsible for our ability to balance. In countries like Cameroon, mothers want their babies to start walking as soon as possible. They start teaching them to walk when they are 1 month old. When they are 10 months old they walk. Another interesting case on how we can teach our brain to do extraordinary things is the case of Angelina, who was born with only half of her brain healthy and lives a fairly normal life. She has complex local crises that make her inactive and insensitive. Her condition is called Sturge-Weber syndrome, except the left side of her brain is perfectly healthy. She undergoes surgery hoping to survive and still be the active, happy child she is. Doctors hope he will recover because his brain is not yet fully developed, so he is still flexible at his age, which makes them more confident that he will recover. At the age of 1 year the human brain loses some of its flexibility making it impossible to transfer functions to the other side of the brain.