Tag: TMS

Magnetic Zaps to the Brain Can Alter People’s Moral Judgments

By Smriti Rao | March 30, 2010 4:47 pm

brain-200Beauty may lie in the eyes of the beholder, but morality, apparently, lies just behind your right ear–in an area scientists call the right temporoparietal junction (RTPJ).

In a study that helps explain the mechanics of morality, neuroscientist Liane Young and her colleagues found that activity in the RTPJ is linked to the types of moral judgments we make–and those judgments can easily be tinkered with using a mere magnet. The researchers found that by delivering magnetic pulses to the RTPJ they were able to impact moral judgments; the magnetic pulses made people less likely to condemn others for attempting but failing to inflict harm [Nature]. The findings were published in journal Proceedings of the National Academy of Sciences.

Says Young: “You think of morality as being a really high-level behavior. To be able to apply a magnetic field to a specific brain region and change people’s moral judgments is really astonishing” [BBC].

Most of us make moral judgments based on not just what the consequences of an action were, but also on what the person’s intentions were. So little children and people with mental illness aren’t judged as harshly for their actions, because their intentions usually aren’t bad. It’s not just a matter of what they did, but how much they understood what they were doing [Nature].

The process of figuring out how much blame to attribute to a person involves the RTPJ. So for this study, scientists used a non-invasive technique called transcranial magnetic stimulation (TMS) to deliver small magnetic pulses to the RTPJ; the pulses temporarily stop brain cells from working normally. Then the researchers asked their subjects questions based on different scenarios while monitoring brain activity with functional magnetic resonance imaging (fMRI).

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CATEGORIZED UNDER: Health & Medicine, Mind & Brain
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