There are 3 main brow actions that mix and match to create 7 different combinations – (1), (2), (1+2), (1+2+4), (1+4), (2+4), and (4). Isolated actions – 1, 2, and 4 – are listed in the main FACS Cheat Sheet. Here are the remaining combos:
inner brow raiser + outer brow raiser
frontalis, pars medialis + frontalis, pars lateralis
- One of the most common combinations
- A signature marker for word emphasis, attentiveness, and punctuation in speech
- Major component of surprise prototype, which also features AU5 and 25+26
- Unintentional activation of AU5 is a common in posed brow raising. I had to concentrate to keep my AU5 neutral.
- The skin between the eyes and nose stretches vertically.
- The skin under the lower eyelid is pulled up.
- The skin around the inner eye corners is also pulled up.
- The shape of the upper eyelid changes, revealing more upper lid.