Concussions are a sub category of injuries referred to collectively as "Traumatic Brain Injury", or "TBI". That's a much scarier term for you. I had mine this

Concussions are a sub category of injuries referred to collectively as "Traumatic Brain Injury", or "TBI". That's a much scarier term for you. I had mine this March, fell while roller skating onto a hard wood floor and had a brain bleed. Surgery was required. The extent of the injury wasn't immediately apparent, I'm told I walked into the ambulance. But after the surgery I was in so much pain they put me into an induced coma for a week, with Fentanyl. The biggest surprise was how random and unpredictable the after effects were. My sense of time was totally messed up; I thought for sure I had killed my chance of getting out of the hospital, after I chased down the doctor and asked him why I was still there when I was scheduled to leave on Tuesday. Then he asked me what day I thought it was, and I realized sheepishly that it was still Monday. The next week, I was having a conversation with my wife and she was describing the situation where you're trying to remember a word but are not able to. I said "You mean aphasia?" So I was able to remember a word I had probably never used in conversation, but couldn't tell what day of the week it was.