Just Google "concussion dementia" and you can see a whole slew of articles on the subject. I realize that I am doing myself no favors from a healing perspective by obsessively searching the Internet for things to worry about. I went away for an off-the-grid camping trip two weeks ago, and that was the best I've felt since the injury. I attribute that amelioration at least in part to getting away from my anxiety-ridden electronica. The trip was not entirely stress-free, because we got caught in a sleet storm, but said anxiety didn't weigh on my soul, and there was a ton of just sitting around staring idly at a campfire and laughing at silly jokes.

I have not looked into the vestibular angle. I assume whatever that might consist of, it's more treatable than a TBI?

JuliaBertha, your story is certainly alarming. I guess the lesson for all of us is to speak up THE VERY INSTANT someone is doing something unwanted to our heads. Like you, I was uncertain of the outcome, and didn't want to unduly scold the young lady.

I have thus far avoided jogging for this very reason: Because I assume that no matter how good my form is, it will constitute an unhelpful amount of gentle jolting (if that's not a total oxymoron). Much as it bums me out, I figure I may never jog again. Thank God for a bicycle!