From the Christian Post:
In 2008, the University of Pennsylvania released findings from a medical study proving that the practice of speaking in tongues is sourced by the Holy Spirit. In the study, participants’ brain activity was monitored while they spoke in tongues, giving the medical researchers scientific insight into the parts of the brain active while speaking in these “heavenly tongues”—and the results were astounding. Speaking in tongues, as ABC News accurately states, “is an ancient practice mentioned in the Bible. [Apostle] Paul called it ‘speaking in the tongues of angels.’ Jesus’ Apostles were first said to do it at Pentecost.”
It is this spiritual phenomenon that Dr. Andrew Newberg, while at the University of Pennsylvania, set out to find an explanation “for what most regard as unexplainable.” While trying to discover the relationship between faith and science, his study quickly ascertained that speaking in tongues is absolutely not regular language. Newberg states to ABC News: “It’s not language—it’s not regular language at least that would normally activate the frontal lobe [of the brain].”