thomas,

When I said I could get a concussion from very light forces, I was meaning forces much stronger that what you have experienced. These forces would cause immediate symptoms. For me, a common instant symptom was a metallic taste in my mouth or the sense I had been punched in the nose. Other times, I would feel dizzy or lightheaded or have a strange pressure behind my eyes.

Researchers would normally consider these forces sub-concussive impacts. My research and calculations suggest these forces have usually been 50 to 60 G's. Research says that most concussions happen at 90 to 120 G's.

Keep in mind that I have had 14 notable concussions. I am permanently disabled. I suffered a severe concussion at 10 years old that put me in the hospital for 3 days. So, my brain is not like the average concussed brain.

So, I am sorry if how I stated my sensitivity to impacts has caused you anxiety.

I have had light impacts like you have described hundreds of times. They do not concern me at all. I have banged my head working on cars. I used to make my living with my head under sinks and had light impacts there. The upward opening doors to my work truck would smack me in the head frequently. None were a concern to me nor did they cause any symptoms. It was rare that I did not have a cut or scrape on my head from all this work under sinks or closing overhead doors..

But, I do know how anxiety can take over and mimic concussion symptoms. There is an overlap but the key symptoms of a concussion are not there. No "I just got my bell rung" feeling. No metallic taste. No dizziness other that that associated with anxiety.

Yes, if I quickly shake my head from side to side, I can get concussion symptoms. But, when I say quickly, if my glasses are not on securely, they would fall off. If I get surprised with a 100 feet of bad potholes in the road and do not have time to position myself to absorb the impacts, I may have trouble. This happened to me once but the potholes lasted on and off for 5 miles and I was in a stiff riding SUV.

So, again, believe me that these contacts are not concussive impacts.

My best to you.