Compared with the neutral photos, a lover’s picture triggers the dopamine system in the brain — the same system associated with pleasure and addiction. But the brain images of those scorned in love also give us clues as to why the breakdown of a relationship can trigger serious health problems. The subjects dealing with failed relationships showed activity in the dopamine system — suggesting they maintained intense feelings for their loved one. But they also showed activity in brain regions associated with risk taking, controlling anger and obsessive compulsive problems. Notably, the scans showed activity in one part of the brain linked with physical pain.