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Benjamin Libet, a scientist in the physiology department of the University of California, San Francisco, was a pioneering researcher into the nature of human consciousness. In one famous experiment he asked a study group to move their hands at a moment of their choosing while their brain activity was being monitored. Libet was seeking to identify what came first — the brain’s electrical activity to make the hand move or the person’s conscious intention to make their hand move. It had to be the second one, surely? But no. Brain activity to move the hand was triggered a full half a second before any conscious intention to move it…. John-Dylan Haynes, a neuroscientist at the Max Planck Institute for Human Cognitive and Brain Studies in Leipzig, Germany, led a later study that was able to predict an action ten seconds before people had a conscious intention to do it. What was all the stuff about free will? Frank Tong, a neuroscientist at Vanderbilt University in Nashville, Tennessee, said: “Ten seconds is a lifetime in terms of brain activity.” So where is it coming from if not ‘us,’ the conscious mind?
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