| Brow lowerer |
AU4 |
The eyebrows are lowered and pulled together, pushing the eyelid down. |
Corrugator supercilii |
| Cheek raiser |
AU6 |
The skin around the temples and cheeks is drawn towards the eyes, narrowing the eye opening. |
Orbicularis oculi |
| Lid tightener |
AU7 |
The eyelids are tightened, narrowing the eye opening. |
Orbicularis oculi |
| Nose wrinkler |
AU9 |
The skin along the sides of the nose is pulled upward and wrinkled. |
Levator labii superioris |
| Upper lip raiser |
AU10 |
The upper lip is drawn up, with the central portion being raised higher than the lower portions. |
Levator labii superioris |
| Lip corner puller |
AU12 |
The lip corner is pulled up diagonally towards the cheekbone. |
Zygomaticus major |
| Mouth stretcher |
AU20 |
The lips are pulled back and sideways, making the mouth look longer. |
Risorius |
| Eye closer |
AU43 |
The eyes are closed, with no apparent tension in the lids. |
Orbicularis oculi |
