AU1 – inner brow raiser action caused by the medial frontalis
Chimpanzees and humans have many things in common when it comes to facial expressions and facial structure; however, they also have many significant differences! Below is a series of imagery focusing on an action affected by the prominent brow ridge seen in chimpanzees: brow raiser – a frontalis action. Observe the key differences and similarities.
Chimpanzees and humans have many things in common when it comes to facial expressions and facial structure; however, they also have many significant differences! Below is a series of imagery focusing on an action affected by the prominent brow ridge seen in chimpanzees: cheek raiser – an orbicularis oculi (orbital portion) action. Observe the key differences and similarities.
If you or your team are using open-source face tracking kits, figuring out what’s what can be challenging. Navigate the ambiguity with the FACS Translation Sheet!
The frontalis (forehead muscle that elevates your eyebrows) does not always follow the imagery presented in anatomy diagrams.
While people can generally activate inner brow raiser spontaneously, inner brow raiser stakes claim as one of the most notoriously difficult action units to trigger during posed expressions. Its elusive nature plagues various fields – from academic research to machine learning and character art.Â
