Looking at faces activates a particular part of the ventral visual cortex called the fusiform face area.

FORBES: Magazine Article

Researchers discovered reduced activity in a part of the cerebral cortex of the brain called the "fusiform gyrus".

BBC: Why autism can't find a face

The pair recorded how cells in a region of the brain devoted to facial recognition, called the fusiform face area, code the information.

ECONOMIST: Facial characteristics