text: Facial muscles are obviously an important item in this. If the technology could not identify the way your facial muscles move, then the technology would not work. Not only do your muscles express emotion, but they also help produce them. The article states that a renowned drama coach, Constantin Stanislavsky, had his actors carefully reproduce smiling and frowning as a way of creating these emotions on stage. This clearly would help the actors express themselves better, thanks to our face muscles. People may not notice, but we imitate other people's facial expressions with empathy.