Figure 2: fMRI activation for the contrast static > dynamic facial expression of happiness vs. static > dynamic facial expression of all other emotions. Time courses of blood oxygen level dependant (BOLD) signal change highlight the contrast in the medial prefrontal cortex with greater signal upon perception of happiness presented as a static facial expression. Light colors represent time courses of activations following static (picture) stimuli presentation, dark colors represent activation related to dynamic (video) stimuli.