I fell asleep after meal, but nonetheless I'm pretty sure it had to do something with the impact. I also get this feeling when I bump my head slightly. Not sure where it is coming from but look at this search result, it seems that I am not the only one who feels this

https://answers.yahoo.com/question/i...6224323AAd9GBZ

and I also know what the discussion about subconcussive impacts is about(especially football). But what does in fact count as a subconcussive impact? I did't hit my head, the impact was just on the arm. Because of my extreme head sensitivity, I also feel it in my brain, when I lay on a pillow and hit the pillow with my hand(that occasionally happens during sleep). Can this be called a subconcussive impact?