Whether you’ve noticed it or not, Facebook has likely changed your brain. You get a rush of dopamine — that same chemical that kicks in when you’re rewarded — when you see a notification. People with more than 229 friends tend to have larger orbital prefrontal cortexes, the area for social behavior and emotion. An interesting infographic from Best Masters in Psychology details the social network’s effect on the brain.
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(from AllFacebook http://allfacebook.com/infographic-the-psychology-of-facebook_b103697)