The Facial Reference Library is an interactive document I created to help instruct on the lines of action on the face and their intention relations to facial expression in art. There are more expressions in the human face than listed here. Most expressions are a mix of those on this list or a more subtle version of those on this list.
I have provided the definition of the emotion, an emoticon displaying the lines of action that change in the face and some images collected from the internet. Every photographic image in this document remains the property of the respective copyright holders, should the inclusion of specific work offend anyone, please contact us directly so we can remove it.