Brains of Introverts Reveal Why They Prefer Being Alone

Human faces may hold more meaning for socially outgoing individuals than for their more introverted counterparts, a new study suggests.

The results show the brains of extroverts pay more attention to human faces than do introverts. In fact, introverts' brains didn't seem to distinguish between inanimate objects and human faces.

The findings might partly explain why extroverts are more motivated to seek the company of others than are introverts, or why a particularly shy

person might rather hang out with a good book than a group of friends.

The study also adds weight to idea that underlying neural differences in people's brains contribute to their personality. 

"This is just one more piece of evidence to support the assertion that personality is not merely a psychology concept," said study researcher Inna Fishman, of the Salk Institute for Biological Sciences in La Jolla, Calif. "There's some broader foundation for the behavior that you see … implicating that there are neural bases for different personality types."

---- LiveScience.com