We've found that there is a little part of the brain that you can see just behind the right ear--the Fusiform Face Area [FFA].
	functional MRI brain scan image

This area gets much more active when people look at (or imagine) faces than when they look at other things.
	*%MR Signal is the change in activity in the Fusiform Face Area that happened when the test subjects looked at each image.

Even when you look at incomplete faces, parts of faces, upside-down faces or even cartoon faces, the FFA shows more activity than when you look at other objects, like houses and cows.

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