Right now, the world is absolutely awash in heavy shoegaze bands. They aren't all worth your attention, but Bristol's Split Chain at least deserve some credit for bringing some vigor and excitement to the task of kind of sounding like the Deftones. Split Chain's full-length debut motionblur drops this summer, and we've already posted their songs “ I’m Not Dying To Be Here ,” “ bored.tired.torn. ," " Subside ," and " Who Am I? " Today, we add the revved-up, drum-heavy rocker "Scatterbrain" to that total. Here's what the band says about it: Like all of our other music, “Scatterbrain” comes from personal experiences growing up that we're sure everyone can relate with to some degree. It's a song about the slow degradation of friendships, relationships, and family ties — how all of a sudden, when things can seem to be at their best, the other person in the relationship, friendship, or the family member seems to stop pulling their…