According to a recent study, there are at least two neural correlates for decision-making in the brain.
If you’re the scarecrow in the Wizard of Oz who yearns for a brain, you have neither of these correlates. However, if you are someone who has frontal lobe damage to the orbitofrontal cortex (OFC), you have one functional neural correlate: for action value comparisons. You can make optimal decisions about how to get a brain (…although you obviously would already have one). Alternatively, you could have suffered damage to the dorsal anterior cingulate cortex (dACC) - in which case you would be able to make stimulus value comparisons and choose which objects are optimal, such as the wittiest or the most creative brain, but not how to get the chosen object. More