text: Now this can also be used to figure out if a student or convict is lying or not. Muscles called orbicularis oculi palpabraeus make crow's-feet around your eyes. But in a false smile, the mouth is stretched sideways using the zygomatic major and a different muscle, the risorius. Now if someone is fake smiling or keeping a strait face while lying the program can use that to help notify people if someone is lying or not.