“Strengthening those facial muscles has no real impact on the support structures ... or two lines in between their eyes, for example, it’s typically not because the muscle becomes stronger ...

The FACS atlas, now on CD ROM, describes all 43 movements, or "action units," facial muscles can perform ... eyebrows and otherwise make faces like real people. Perhaps most importantly, because ...

The face we present to the ... the key difference between this “real” happy smile and a “fake” happy smile lies in the orbicularis oculi – muscles that wrap around the eyes.