TABLE 3.
Action units of humans.
| Number | AU description | Number | AU description |
|---|---|---|---|
| 1 | Inner brow raiser | 24 | Lip pressor |
| 2 | Outer brow raiser | 25 | Lip part |
| 4 | Brow lowerer | 26 | Jaw drop |
| 5 | Upper lid raiser | 27 | Mouth stretch |
| 6 | Cheek raiser | 28 | Lips suck |
| 7 | Lid tightener | 29 | Jaw thrust |
| 8 | Lips toward each other | 30 | Jaw sideways |
| 9 | Nose wrinkler | 31 | Jaw clencher |
| 10 | Upper lip raiser | 32 | Lip bite |
| 11 | Nasolabial furrow deepener | 33 | Cheek blow |
| 12 | Lip corner puller | 34 | Cheek puff |
| 13 | Cheek puffer | 35 | Cheek suck |
| 14 | Dimpler | 36 | Tongue bulge |
| 15 | Lip corner depressor | 37 | Lip wipe |
| 16 | Lower lip depressor | 38 | Nostril dilator |
| 17 | Chin raiser | 39 | Nostril compressor |
| 18 | Lip puckerer | 41 | Lid droop |
| 19 | Tongue out | 42 | Slit |
| 20 | Lip stretcher | 43 | Eyes closed |
| 21 | Neck tightener | 44 | Squint |
| 22 | Lip funneler | 45 | Blink |
| 23 | Lip tightener | 46 | Wink |