The embouchure is produced with the muscles around the lips : principally the orbicularis oris muscle and the zygomaticus major, which will produce a smile, flattening the top lip against the maxillary ( upper jaw ) teeth.
12.
Using facial EMG in immersive virtual environments, Philipp, Storrs, and Vanman showed that even relatively impoverished social cues in a virtual environment can cause increases in zygomaticus major activity that are unrelated to self-reported emotional states.
13.
Research with psychophysiological methods corroborated this positive effect on affective experience : easy-to-perceive stimuli were not only judged more positively but increased activation in the zygomaticus major muscle, the so-called " smiling muscle ".
14.
The zygomaticus muscles, which run down from the eyes across the cheeks to the corners of the mouth, contract in a true smile of enjoyment which is why the old adage about a sincere smile being visible in the eyes is true.
15.
The lateral fibers, forming the " zygomatic head " ( also known as the zygomaticus minor muscle, ) arise from the malar surface of the zygomatic bone immediately behind the zygomaticomaxillary suture and pass downward and medialward to the upper lip.
16.
"Oryzomys zygomaticus " was first described by Merriam in 1901 as a separate species Three specimens from central El Salvador have " Cytb " sequences similar to those of " zygomaticus ", but in " The Mammals of El Salvador " ( 1961 ), Burt and Stirton recorded only the subspecies " couesi " from the country, while noting that specimens from some localities were slightly paler than others.
17.
"Oryzomys zygomaticus " was first described by Merriam in 1901 as a separate species Three specimens from central El Salvador have " Cytb " sequences similar to those of " zygomaticus ", but in " The Mammals of El Salvador " ( 1961 ), Burt and Stirton recorded only the subspecies " couesi " from the country, while noting that specimens from some localities were slightly paler than others.
