What can a diseased brain tell us about being human, living our own lives better and helping those with dementia get the best from theirs?When Wendy Mitchell was diagnosed with young-onset dementia at the age of fifty-eight, her brain was overwhelmed with images of the last stages of the disease - those familiar tropes, shortcuts and cliches that we are fed by the media, or even our own health professionals. But her diagnosis far from represented the end of her life. Instead, it was the start of a very different one.