I know this is weird but in my POIS I get these foggy feelings in my head like there is some chemical attacking my brain or something and causing this "foggy" feeling. Its like I don't have control over a specific part of my brain and there are a lot of cobwebs in it. All I feel is pressure in the area but I cannot adequately use that area of my brain. I found recently that actually shaking my head, or vibrating it (which I do) by tensing the neck muscles, actually relieves me of some of this foggy feeling and my head feels "clearer" for more than a moment. It is very weird. I just wonder what could be happening, possible increased blood flow? Maybe shaking some kind of auto-immune hormone, disease, virus, chemical or whatever out of my head? It is just very strange. I'm going to continue doing this, as my head feels clearer.