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Action Unit Combinations in the Upper Face
You will now learn a number of Action Unit combinations which involve the single AUs you now know. Not all the possible combinations of these AUs will be shown and described, but some of the most common ones and most problematic ones to score are included. When you learn each new AU combination, refer back to the images of the single AUs which are involved and to Figure 2-1, which shows the location and direction of action of the component elements.
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