How does the brain react to a romantic breakup?
Xiaomeng (Mona) Xu, a postdoctoral research fellow at the Warren Alpert Medical School at Brown University and at the Miriam Hospital, responds:
You're in the midst of a breakup and feel like a different person. You find yourself spending a lot of time longing for your ex, constantly checking her Facebook updates, and wondering what went wrong. This shift in patterns of thought and behavior may be caused by neural changes that occur after a breakup.
For the rest of the story: http://www.scientificamerican.com/article.cfm?id=how-does-the-brain-react-to-a-romantic-breakup