The Duchenne smile: emotional expression and brain physiology. II - Ekman, P; Davidson, R J; Friesen, W V (Journal of personality and social psychology, 1990)
Keywords: Adolescent; Adult; Alpha Rhythm; Arousal - physiology; Beta Rhythm; Cerebral Cortex - physiology; Dominance, Cerebral - physiology; Electroencephalography; Emotions - physiology; Facial Expression; Facial Muscles - physiology; Female; Frontal Lobe - physiology; Happiness; Humans; Smiling - physiology