With the help of Functional magnetic resonance imaging (fMRI), the existing legal system could experience a rejuvenation. fMRI can tell if the person is telling the truth or not because specific brain regions light up when a person tells a lie and fMRI can record it. This procedure is more reliable than The standard polygraph test, which is based on the apparent manifestation of certain emotions associated with lying such as increased perspiration, change in body position and subtle facial expression. These manifestations can be masked by professional liars while they can not influence the brains activity.

fMRI could be an ideal test that can be used in a court, crime investigation and prevention.

The researchers recruited 11 subjects for the study. Five of them were asked to tell the truth while the rest were supposed to lie. All the participants were assessed with fMRI and the standard polygraph test. fMRI was 92 % accurate. Specific regions of the brain were repeatedly activating when persons tried to mask or conceal the areas associated with truth telling. Only 7 areas of the brain were activated during truth telling and 14 during deception. The frontal lobe was found to be very active in deception and inhibition of truth.