• Emotion-generating stimuli cause an increase in arousal in the
body, due to activation of the sympathetic nervous system. The
arousal increases the intensity of the emotion, but does not seem
to be necessary to experience emotions.
• Facial expressions communicate emotions. They also help to
generate and understand emotions, but do not seem to be critical
• There are few indications that the arousal is emotion-specific. The
same is true for the pattern of brain activation.
• The amygdala is an important structure for the experience of