Our brain universally does not detect emotion rather it makes a prediction.
Ask yourself how you are changed as you see different words float by.
Follow the link and read the story.
A 19-year-old searched for her brother at a protest. Then a bullet struck her forehead. BY SARAH BLASKEY AND JEFF ABBOTT Special to the Miami Herald 01/05/2017
The TED clip is 20 minutes and worth watching as convincing evidence of "prediction".