I am not sure why the link was down voted. But here is the excerpt from the wiki page:

In 2005, a UCLA and Caltech study found evidence of different cells that fire in response to particular people, such as Bill Clinton or Jennifer Aniston. A neuron for Halle Berry, for example, might respond "to the concept, the abstract entity, of Halle Berry", and would fire not only for images of Halle Berry, but also to the actual name "Halle Berry".

EDIT: Here is another link:

http://www.newscientist.com/article/dn7567-why-your-brain-ha...