From these patients, they deduced that new memories are formed in the hippocampus, fear comes from the amygdala, and we recognize faces using the fusiform face area.
Hypotheses point to the angular gyrus and the fusiform gyrus, which are structures in the brain responsible for things like understanding metaphors and integrating multiple sensory inputs.
Brain malfunctions can also cause you to see things that aren't there, like faces with huge teeth and eyes if a certain part of the fusiform gyrus is overactive.