Muscular Anatomy of the Face
There are quite a few anatomy resources on the web, but not a lot that combine clear illustrations with pictures of the muscles in action.
With the help of a patient model and a fine illustrator, I hope this resource helps clarify how the face can make so many expressions.
You will also find a link to my Craniometric Landmarks web app which is a part of my online forensic sculpture class.
Levator labii superioris
This muscle originates on the lower margin of the orbit to the upper margin of the Orbiularis oris. It is a wide flat muscle and its medial extent can pull the outer edge of the nostril up when contracting. We use this muscle when we sneer.

