AU | Description | Facial muscle | Example image |
1 |
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2 |
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4 |
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5 |
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6 |
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7 |
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9 |
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10 |
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11 |
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12 |
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13 |
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14 |
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15 |
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16 |
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17 |
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18 |
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20 |
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22 |
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23 |
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24 |
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25 |
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26 |
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27 |
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28 |
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41 |
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42 |
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43 |
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44 |
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45 |
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46 |
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51 |
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52 |
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53 |
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54 |
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55 |
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56 |
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57 |
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58 |
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61 |
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62 |
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63 |
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64 |
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* AUs (Action Units) underlined bold are currently recognizable by AFA System when occurring alone or cooccurring.
** The criteria has changed for this AU, that is, AU 25, 26 and 27 are now coded according to criteria of intensity (25A-E) and also AU 41, 42 and 43 are now coded according to criteria of intensity