smile
Sign in to savethumb|Detail of the Mona Lisa, who is known for her smilethumb|A smiling child A smile is a facial expression formed primarily by flexing the muscles at the sides of the mouth. Some smiles include a contraction of the muscles at the corner of the eyes, an action known as a Duchenne smile. Among humans, a smile expresses delight, sociability, happiness, joy, or amusement. It is distinct from a similar but usually involuntary expression of anxiety known as a grimace. Although cross-cultural studies have shown that smiling is a means of communication throughout the world, there are large differe
AI overview
A smile is a facial expression created mainly by flexing the muscles at the sides of the mouth, and it sometimes involves contracting muscles around the eyes as well. Among humans, smiles typically communicate feelings like happiness, joy, or friendliness, and are recognized as a form of communication across different cultures around the world.
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Article
12 sectionsContents
- Evolutionary background
- Social effects
- As reinforcement and manipulation
- Cultural differences
- Dimples
- Duchenne smile
- Non-Duchenne smile
- Other animals
- See also
- References
- Further reading
- External links
thumb|Detail of the Mona Lisa, who is known for her smilethumb|A smiling child A smile is a facial expression formed primarily by flexing the muscles at the sides of the mouth. Some smiles include a contraction of the muscles at the corner of the eyes, an action known as a Duchenne smile. Among humans, a smile expresses delight, sociability, happiness, joy, or amusement. It is distinct from a similar but usually involuntary expression of anxiety known as a grimace. Although cross-cultural studies have shown that smiling is a means of communication throughout the world, there are large differences among different cultures, religions, and societies, with some using smiles to convey confusion, embarrassment, or awkwardness.
== Evolutionary background == Primatologist Signe Preuschoft traces the smile back over 30 million years of evolution to a "fear grin" stemming from monkeys and apes, who often used barely clenched teeth to portray to predators that they were harmless or to signal submission to more dominant group members. The smile may have evolved differently among species, especially among humans.