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Number and description of observed action unit
| Action unit # | Description |
|---|---|
| 1 | Inner brow raise |
| 2 | Outer brow raise |
| 4 | Brow lowerer |
| 5 | Upper lid raise |
| 6 | Cheek raise |
| 7 | Lids tight |
| 10 | Upper lip raiser |
| 12 | Lip corner puller |
| 14 | Dimpler |
| 17 | Chin raiser |
| 18 | Lip pucker |
| 20 | Lip stretch |
| 23 | Lip tightener |
| 24 | Lip presser |
| 28 | Lip suck |
| 37 | Lip wipe |
| 43 | Eye closure |
| 45 | Blink |
