By Ed Yong
This “Marshmallow Test,” first conducted in the 1960s, perfectly illustrates the ongoing war between impulsivity and self-control. The kids have to tamp down their immediate desires and focus on long-term goals—an ability that correlates with their later health, wealth, and academic success, and that is supposedly controlled by the front part of the brain. But a new study by Alexander Soutschek at the University of Zurich suggests that self-control is also influenced by another brain region—and one that casts this ability in a different light.
Press your right index finger to the top of your right ear, where it meets your head. Now move up an inch and back an inch. You’re now pointing at your right temporoparietal junction (rTPJ). This area has long been linked to empathy and selflessness. But Soutschek, by using magnetic fields to briefly shut down the rTPJ, has shown that it’s also involved in self-control.
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