How could I stop the breakage in the back an the middle of my head.
Hm. Do you wear barrettes or something? Why do you think it's breaking off just there? Are you deep conditioning once a week? Using a leave-in conditioner?
I had this issue a year or so ago, and I realized it was from continually wearing my part in the same place. I switched up where I wear my part and that did the trick.But if it's not that, is that section of your hair getting as much treatment as the rest of your hair? I know sometimes that area is hard to take care of (mainly because its the hardest to reach before your arms just get tired...). Just make a conscious effort to give that area a little more love and you should be good!