(PhysOrg.com) -- With smiles, grimaces or raised eyebrows, most of us show our feelings on our faces, but people with Moebius syndrome, a rare condition that causes facial paralysis, can't make any facial expressions at all. Professor of Psychology David Matsumoto and alumna Kathleen Rives Bogart studied people with this unusual condition in an effort to explore how the human brain interprets facial expressions of emotion.
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