"There’s little doubt that our spatial smarts are integral to many crucial cognitive functions. When they fail us, we lose more than our coordinates in space. When we don’t knowwherewe are, we lose a sense ofwhowe are. Disorientation is as much a psychological condition as a physical one. Cut off from the world, we struggle to stay afloat. ‘On bad days, there is a fuzziness, similar to the way the picture on the telly looks when it starts to break up, making it harder to decipher,’ writes Wendy Mitchell inSomebody I Used to Know(2018), a memoir of her own progressing dementia. ‘A fog descends, confusion reigns and there is no clarity from the moment I open my eyes.Where am I?’"