Temple University scientists are developing a future fool proof lie detector that uses MRI (magenetic resonant imaging) technology to look "directly at peoples' brain activity." The technique isn't perfected yet because there are many areas of the brain that are used during lying.
"There really is no one lying center," Faro says. "There are multiple areas in the brain that activate because there are a lot of processes that have to take place."
One thing they found is that "the brain has to work much harder to lie than to tell the truth." There research showed that lying subjects had twice as much brain activity as the truthful subjects.