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A one-hour session draws on yoga and emphasizes strengthening the zygomatic muscles, which pull the corners of the mouth.

Despite having no medical training, her curriculum, typically taught in one-hour sessions online or in person, draws on yoga and emphasizes strengthening the zygomatic muscles, which pull the corners of the mouth.

He flashed a smile, activating the zygomatic major.

Smiles that researchers classify as “strong”—when the zygomatic muscles in the cheeks contract and lift the corners of babies’ lips—are another sign of positive engagement in what’s happening around them.

Sam Presti, the Thunder's executive vice president and general manager, announced that the procedure to repair the zygomatic arch was a success.