Bias in pain avoidance

According to a study of 41 people in which participants attempted to minimize the number of painful electric shocks received during a gambling experiment, some people learn to avoid pain by mostly abstaining from actions that previously resulted in pain while others learn to avoid pain by tending to perform actions that helped them avoid pain in the past, and MRI scans showed marked differences between the two groups in the structure and function of the striatum, a brain region implicated in goal-directed decision making. - See at PNAS.org

Article #15-19829: “Striatal structure and function predict individual biases in learning to avoid pain,” by Eran Eldar, Tobias U. Hauser, Peter Dayan, and Raymond J. Dolan.