"Screen technologies cause high arousal which in turn activates the brain system's underlying addiction. This results in the attraction of yet more screen-based activity. (connections in the brain) can be temporarily disabled by activities with a strong sensory content — 'blowing the mind'. Or they can be inactivated permanently by degeneration — ie. dementia." - Baroness Greenfield

What evidence or proof does Greenfield bring with this argument? Absolutely none...not a single bit of work to back up these claims. Not really surprising, is it?!