Dynamic micro aspects of facial movements in elicited and posed expressions using high-speed camera

The presented study investigated the dynamic aspects of facial movements in spontaneously elicited and posed facial expressions of emotion. We recorded participants´ facial movements when they were shown a set of emotional eliciting films, and when they posed typical facial expressions. Those facial movements were recorded by a high-speed camera of 250 frames per second. We measured facial movements frame by frame in terms of displacements of facial feature points. Such micro-temporal analysis showed that, although it was very subtle, there exits the characteristic onset asynchrony of each part´s movement. Furthermore, it was found the commonality of each part´s movement in temporal change although the speed and the amount of each movement varied along with expressional conditions and emotions