The zygomatic major, the risorius, and the buccinator muscles around the upper and lower lip all contract to reveal the teeth. Chimps usually make this expression as a sign that they’re submitting or ...

Learning From The Dead: What Facial Muscles Can Tell Us About Emotion Date: June 17, 2008 Source: University of Portsmouth Summary: Laugh and the world laughs with you, but wrinkle your nose and ...

But it’s now possible to manipulate the muscles and lift the face’s SMAS sheet through a short series of 20-minute nonsurgical, no-injection sessions. ... (risorius muscle).

Researchers from the University of Portsmouth found that some people have fewer facial muscles than others. Everyone has a core system of five muscles in the face that enables them to express certain ...