Upper back, lagging

[yomama]

My inner upper back muscles are lagging, my lower back has grown without me even working it out, but the upper middle portion is just fuckin not growing. I have wide shoulders, and I am doing every damn excersize there is to do. Deads just seem to work my lower back, I just cant seem to hit that muscle when I do excersizes, I cant feel it when I'm working it out.