Here’s an excerpt from the online edition…
At the University of Pennsylvania, Dr. Andrew Newberg has been conducting a scientific study of the phenomenon for a long time. According to an ABC report, Newberg found that brain scans show quite different results with Christians praying in tongues compared to Buddhist monks meditating and Franciscan nuns praying. The frontal lobes—the part of the brain right behind the forehead that's considered the brain's control center—went quiet in the brains of tongue-speakers.
"When they are actually engaged in this whole very intense spiritual practice...their frontal lobes tend to go down in activity. It is very consistent with the kind of experience they have, because they say that they're not in charge. [They say] it's the voice of God, it's the Spirit of God that is moving through them," said Newberg.
"Whatever is coming out of their mouth is not what they are purposefully or willfully trying to do. And that's in fairly stark contrast to the people who are—like the Buddhist and Franciscan nuns—in prayer, because they are very intensely focused and in those individuals the frontal lobes actually increase activity."
You can read the entire article and access video at:
http://abcnews.go.com/Nightline/story?id=2935819&page=1