Our little black box

Our brains are our little black boxes, making us who we are. But how does a brain store memories and where? Why do we lose them as we get ill or old? This was the subject for our guest, neurologist and neuroscientist Emrah Düzel. His group in Magdeburg Germany, looks at new ways of tackling diseases such as Alzheimer's, like exercise and brain training. So listen in and form a few new synapses of your own.