NEW STUDY: Teenage brains process 'likes' and 'comments' on social like winning money...

Whether you're on Facebook, Instagram, Snapchat, Whatsapp or Twitter, the way you communicate with friends today is changing.

Keeping in touch is no longer about face to face, but instead screen to screen, highlighted by the fact that more than 1 billion people are using Facebook every day.

Social media has become second nature -- but what impact is this having on our brain?

In a recent study, researchers at the UCLA brain mapping center used an fMRI scanner to image the brains of 32 teenagers as they used a bespoke social media app resembling Instagram. By watching the activity inside different regions of the brain as the teens used the app, the team found certain regions became activated by "likes", with the brain's reward center becoming especially active.

"When teens learn that their own pictures have supposedly received a lot of likes, they show significantly greater activation in parts of the brain's reward circuitry," says lead author Lauren Sherman. "This is the same group of regions responding when we see pictures of a person we love or when we win money."

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