Distortion Plays Into How People Percieve Emotions...

Interesting page on Japanese vs. Dutch methods of perceiving emotions, Japanese compensate for distortion of masked anger by paying more attention to the voice than the facial expressions...the muscles are universal, but the distortions are culture specific: http://www.psychologicalscience.org/index.php/news/releases/perception-of-emotion-is-culture-specific.html

Remember that as actors, there are lots of tools at our disposal...you can disconnect the voice from the facial reactions, if the piece calls for it.