1294 www.thelancet.com Vol 376 October 16, 2010 More than two decades ago I was a young researcher in a laboratory in San Francisco, California, using multichannel electroencephalography (EEG) to study the functions of the brain. One of our experiments was on the eff ects of fatigue on memory, and we were interested to learn how the brains of elite professionals whose work required extraordinar...