But What About People?
When it comes to fear, rats and people have a lot in common, says Joseph LeDoux, a professor of neuroscience at New York University and one of the nation's most prominent fear researchers.
You can see the similarities by watching a video taken during the 1996 Olympics in Atlanta, LeDoux says. It shows a crowd of people watching a concert. Then a bomb explodes "and everyone is hunkered down in a freezing posture," he says.
LeDoux says he is confident that rat experiments like the one done by Luthi's team will lead to better treatments for humans. Human brain cells have sheaths like those in rats, and these could become a target for new drugs.
Research on ways to erase memories has some people worried about the potential for misuse by governments or the military.
But LeDoux says it would be wrong to halt experiments that could help people with phobias, panic disorder, or PTSD.
"Any PTSD patient I've talked to has been willing to sacrifice a few normal memories for the bad ones they may get rid of if these experiments are successful," he says.