Economy Scientists decode possible origin of human speech Updated : July 23, 2018 10:57 PM IST The findings showed that these circuits are involved in face recognition, facial expression and emotion and they may very well have given rise to our singular capacity for speech. Currently, the researchers are measuring the electrical activity in individual neurons in all three of the networks revealed in the scans. Subscribe to Moneycontrol PRO at just Rs.33/- per month for the first year. Use code SUPERPRO. Limited period offer. Available on Web and Android.