Mind-changing circuitry
Humans are good at making decisions in the face of incomplete or shaky information. We’re able to work toward a goal without knowing every step of the way ahead of time because we can update and reevaluate our beliefs about our knowledge of the situation as we go. A brain imaging study reveals the neural circuitry involved, and shows that the two aspects of changing our minds about what we know — updating and reevaluating — are handled by two different parts of the cerebral cortex.