In A Nutshell, has a nice [video] about addiction:
https://www.youtube.com/watch?v=ao8L-0nSYzg&feature=youtu.be
Note: below is a link from reddit about their opinions from the video (maybe or maybe not they are actually a neuroscientist ¯\_(ツ)_/¯ )
https://www.reddit.com/r/videos/comments/3qp6sa/everything_w...