Learn about Facial Expressions in this educational video from dizzo95.
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Male Speaker: There are more than 30 muscles that are attached to the bones of the skull and inserted into the facial skin. These are the muscles which give our faces the mobility moving under the skin to create the raptor of expressions we used to match our conversations or mood. Even when a face appears expressionless the muscles still maintain tone giving tensions to the skin when we smile these are the Medicus and risorius muscles pull the mouth up and back and orbicularis oculi muscles contract to narrow the eyes. Frowned eyes and narrowed eyes which characterize and expression of concerned a cause by contraction of the -- and orbicularis muscles.