One thing that is for certain is that no one individual is effected the same... which is the crux of how complicated the issue of standardizing treatment is.
Even in this thread alone you have people who suffered concussions and have suffered a huge variance of symptoms and duration of effects.
I've suffered probably about 15ish grade 1 concussions with 2 severe ones. I played 8 yrs of football, plus 8 yrs of rugby with just 2 yrs overlapping...
I consider myself lucky in the sense that the legacy of my concussion history has resulted in "merely" a severe lack of short term memory.
Wife could tell me something, or at work an employee could request something from me, and it's gone from my consciousness within minutes. It's bad.... to the point where at work they now know if it isn't written or emailed, requests or communication with me is next to useless. If I sit down and concentrate on the communications I've had during the day, I can usually remember and put things together... I.e. wife ìs going out tonight... and she has told me 5 different times where and why and she's walking out the door I'm like.. where you going? She used get pissed... she knows now tho. But now I also avoid that last question and instead sit there for a few minutes racking brain to remember wtf is up... and I can will the answer to me... but it sucks. Also.. alcohol probably doesn't help, heh...
I used to practice as a 'quack' chiropractor... high knowledge of the neurological system.. practiced for about a decade till focusing on our family business... but dealt with many head and neck trauma and concussion patients.
I was trained and educated at a time when the word concussion wasn't a toxic word..
It was a matter of fact..
Got your "bell rung" - grade 1 concussion... memory loss surrounding your injury? - grade 2 concussion..
Ktfo- grade 3.
I.e. Pettersson on first glance looks like a grade 1 or 2.. but it depends on if he can recall sequence of events... without video of course.
Even 20 yrs ago... when I suffered my grade 2... I wasn't allowed to play/practice (rugby) for 3 weeks. I also had to be woken up every 2 hrs from sleep for 24 hrs after the game...
Still remember the incident gloriously... I was playing for SFU and we were playing UBC... a big deal.
My memory : I went for a tackle, took a shot to the head was buzzed, ran back to my position, coaches and players on the sideline are yelling and motioning to me, asking if I'm ok, I motion no, and they took me out of the game and I got assigned the concussion protocol...
What actually happened : I went in for the tackle, got buzzed, backed up into position, went back in with a crazy kamikaze tackle on another player, got back up stumbling, but the play came back my way and I dived back in with a sick tackle, ball came loose, we got it and the play went the other way.. I went back into position and but was behind the play, looking shaky and coaches were trying to get play stopped to get me off... so I had a few minutes of gameplay completely wiped out..
I only found out about what happened when I went to practice (as a spectator) the following week... blew my mind..
But I had gained legendary status for the 3 backtobacktoback insane tackles I managed to pull off without any memory of it...
Concussions are different for everyone.