The Role of Brain Imaging in Emotional Behavior

In the book, you go through first the facial expressions, how they actually fail to be universal. And then you went to the brain, I guess that's when you started looking at brain imaging and what did you discover there? Yeah, well, here's what happened. When people realized that there was this variability, they said, oh, the consistency for each emotion is in the body, right? That's actually not true because a person can tremble in fear, jump in fear, freeze in fear, hide in fear, attack in fear, even laugh in the face of fear. So we're really interested to try to understand. If you think about the brain as billions of neurons