Is it to cause benefit and not harm? Is it to do what’s right? Who gets to decide what’s right? While philosophers have been debating these questions for millennia, neuroscientists are now joining in the fun. In recent years, researchers have been taking pictures of people’s brains while moral judgments are being made to try to make sense of it all. In a recent article published in PNAS, a team of American researchers tried to find where morality lives in your brain.
The researchers used a technique called transcranial magnetic stimulation (TMS, see picture). In short, it consists of placing magnets near the participant’s head and applying a magnetic field targeted at a specific brain region. The current generated by the magnetic field can pass through the skull and disrupts the targeted brain region. The whole thing is non-invasive and not painful.