Figure 3.12: Six basic human emotional expressions These expressions, taken from Ekman and Friesen’s atlas of emotional expressions, were produced by a model who was asked to move specific facial muscles in specific ways. As you study each figure, try to describe the positions of the facial features for each expression. For example, surprise can be described as follows: The brows are pulled upward, producing horizontal wrinkles across the forehead; the eyes are opened wide, revealing white above the iris; and the lower jaw is dropped, with no tension around the mouth.
Ekman & Friesan (1975) Unmasking the Face. Englewood Cliffs, NJ Prentice Hall