““test subjects played a gambling game while Knutson and his team looked at which areas of their brains became more active. The startling results showed that the nucleus accumbens was not activating when the reward (in this case a monetary payout) was received, but rather, in anticipation of it. The study revealed that what draws us to act is not the sensation we receive from the reward itself, but the need to alleviate the craving for that reward. The stress of desire in the brain appears to compel us, just as it did in Olds’ and Milner’s lab mouse experiments.””