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FACS: Action Unit 6
Cheek Raise & Lid Compressor
Orbicularis oculi
& pars lateralis
AU6 is a key component of many facial correlates of emotion and pain.
FACS: Action Unit 12
Lip Corner Puller
Zygomaticus major
AU12 is a key component of facial displays of happiness, amusement, contentment, and mirth.
FACS: Action Unit 25
Lips Part
The parting of the lips can occur for any number of muscular reason such as nose wrinkling, lip lifting or lowering, to pulling the jaw open.
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