Fake or polite smiles, on the other hand, usually involve only the mouth muscles. The eyes remain wide or indifferent, and ...

Fake or polite smiles, on the other hand, usually involve only the mouth muscles. The eyes remain wide or indifferent, and ...

Fake or polite smiles, on the other hand, usually involve only the mouth muscles. The eyes remain wide or indifferent, and ...

Fake or polite smiles, on the other hand, usually involve only the mouth muscles. The eyes remain wide or indifferent, and ...

The first group is associated with the corners of the mouth—where, for example, the risorius (from the Latin to smile) draws the corners outward and the zygomaticus major muscle lifts them.

The first group is associated with the corners of the mouth – where, for example, the risorius (from the Latin to smile) draws the corners outward and the zygomaticus major muscle lifts them.

The first group is associated with the corners of the mouth – where, for example, the risorius (from the Latin to smile) draws the corners outward and the zygomaticus major muscle lifts them.