But once in a while, things don't go so well, and there's trouble in these circuits, and there are some rogue neurons that are misfiring and causing trouble, or sometimes they're underactive and they're not quite working as they should.
하지만 간혹 일이 잘 안될 때가 있어요. 회로에 문제가 생기고 나쁜 뉴런이 잘못된 신호를 전달하거나 활동을 하지 않을 때도 있죠. 자기가 해야 할 일을 안하는 겁니다.