The purpose of the study was to investigate facial and emotional reactions while viewing two
different types of smiles and the relation of emotional empathy to these reactions. Facial
EMG was recorded from the orbicularis oculi and zygomaticus major muscle regions while
subjects individually watched two blocks of stimuli. One block included posed facial
expressions of the Duchenne smile (a felt smile) and a neutral face, the other block included
expressions of another type of smile called non-Duchenne smile (an unfelt smile) and a …