Some sea lions suffer from a form of epilepsy that bears a striking resemblance to epilepsy in humans. That insight could help scientists develop treatments and eventually find a cure for temporal lobe epilepsy, one of the most common forms that people get.
It's common sense: If you want to study the brain, open it up and take a look. That's not an opportunity scientists often get. One rare exception: patients with severe epilepsy, who volunteer their time as research subjects in the course of their treatment.