MICROANATOMY

Detailed explanation-1: -A facial expression is one or more motions or positions of the muscles beneath the skin of the face. According to one set of controversial theories, these movements convey the emotional state of an individual to observers. Facial expressions are a form of nonverbal communication.

Detailed explanation-2: -Facial expressions that give clues to a person’s mood, including happiness, surprise, contempt, sadness, fear, disgust, and anger.

Detailed explanation-3: -They used the algorithm to track instances of 16 facial expressions one tends to associate with amusement, anger, awe, concentration, confusion, contempt, contentment, desire, disappointment, doubt, elation, interest, pain, sadness, surprise and triumph.