Anagram-tastic

Is there a word to describe the phenomenon of when your brain gets stuck on the same process and continues to repeat it?  You know, like after you’ve played too much Tetris or Dr. Mario, and when you go to bed all you can think about is falling blocks.  Or when the first line of a song goes all broken-record inside your head or the only thing that your mind can create is the chorus of Miley Cyrus’ “The Climb.”  For me today, it has been maybe the nerdiest of all: making mental anagrams.  DANGER…RANGED… GRANDE…GANDER…GRADE…RANG...DANG...DARN…DRAG…REND…AND…END.  It’s been constant all day long—in the shower, as I drove to school, going to sleep.  I think this the first stage of either insanity or autism. 

I really need to lay off the word game on my Kindle. (LINKED…LINED…LIKED…KIND…DELI…LIED…DINE…)