Hey there. This may sound pretty pathetic, but...
I've been suffering PCS for the last 2 weeks and I'm already feeling alot better. But I've just read about SIS on wikipedia and I'm absolutely crapping myself over the description of how easy it is to get it.
I mean, can a simple "jerking of the head" really cause this? Does that mean I'll risk dying from doing jumping jacks or shaking my head sideways? I'm not sure whether or not I'm getting worked up over this because of the severe anxiety caused by my concussion, but I can't even sleep with the fear of lightly bumping my head on the wall. Could somebody give me an idea of how hard you would need to hit your head to risk getting SIS?