Conversely, zygomatic muscle activity increases incrementally with positive valence ratings.
We gained direct access to the orbitofrontal cortex through a retro-orbital approach, sparing the zygomatic arch and the eye.
The first factor, associated strongly with hedonic judgments, correlates highly with measures of activity in the zygomatic and corrugator muscles of the face that participate in emotional expression.
The upper molars extend onto the zygomatic arch and are considerably smaller than their neighbouring premolars.
Adult males have skulls measuring 32.6-43.1 cm in length and 31.2-38.5 cm wide at the zygomatic arches.
The zygomatic plates, the flattened anterior portions of the zygomatic arches (cheekbones), are expansive and show well-developed notches at their front ends.
This bifid variation of the muscle originates as a single structure from the zygomatic bone.
The interorbital region is 4.14 mm long and the zygomatic plate is 2.38 mm.
