So moving your head from side to side really quickly in a linear fashion, has the same effect as moving your head up/down quickly? Or is the odds of tearing axons greater with up/down movement? I recall that's been said. Anyways, so even if I moved my head up/down as fast as I potentially could, it wouldn't cause damage to the brain? Of course it would be harsh on the neck as I am feeling at this moment, and I can surely tell I ain't ever gonna do reassurance compulsions again, I am still a bit worried that it causes cumulative sub concussive damage of some sort, I think I moved my head up and down almost as fast as I could just to calm myself down, as stupid as it may sound. Yep, so much for the logic of OCD. Reading from others here, the diziness I had after it could then be from anxiety, the inner ear or even from the neck apparently. Last but not least, it could be from sub concussive blows it might have produced, which I really hope isn't the case. I don't hope it can be termed as headbanging since there is no movement of the other body parts, and even then, new research seems to indicate that the odds of any brain damage is very low even from headbanging, which I find hard to believe.

What I really want to know is pretty much just if there is any difference from whipping the head up and down or side to side, both in linear and rotational cases. If so, what and why? Is the space between the skull and the brain the same in the front/back as it is in the sides of brain and inner skull? Can the brain easier get shaken from up and down movement rather than side to side? Sorry for always trying to squeeze in a lot of questions in one go.