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In psychology, facial expressions are a key component of how emotions are physically expressed. While some gestures and body language can vary significantly across cultures, research suggests that certain facial expressions are universal.1

Studies, notably by Paul Ekman, have indicated that basic emotions like anger, disgust, fear, joy, sadness, and surprise are recognized through consistent facial expressions across different cultures. These expressions are thought to be part of an "affect program" involving characteristic facial movements, vocalizations, and physiological responses. For instance, a genuine smile, known as a Duchenne smile, involves specific muscle contractions around the eyes, distinguishing it from a false smile. Eyebrows also play a role in nonverbal communication, helping to convey a range of emotions such as surprise or anger through their movement.213

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