I walked into the corner of a low-hanging, plaster-on-brick doorway at a slow-to-medium walking speed -- which is about 1.0 to 1.5 m/s. The corner made contact with the top-front of my head, about 2 inches back from my hairline -- the middle of the frontal bone. Despite a shooting pain that resonated in my teeth there were no noticeable immediate symptoms, and the fact that I stayed on my feet and experienced the full arch of the pain means I didn't lose consciousness. No amnesia either (pre or post) Despite being quite sharp, the edge didn't split my scalp but did produce a raised welt.
The problem is that I had only had about 2 hours sleep that evening, and therefore felt understandable tired throughout the day, but being prone to anxiety -- as you accurately judged -- I am worried that my mental slowness wasn't entirely the result of a lack of sleep.
As I mentioned, I have heard cases were people suffer an impact and then only develop symptoms hours or days later. Is this just something medical professionals say to make sure people are not complacent, or might it result from the fact that many sports people do not take the immediate symptoms seriously, because they often resolve quickly without any long term problems, or hide them to stay in the game -- and it is in these cases that the symptoms can come back later?
I don't have any diagnoses per say, but I am prone to episodes of profound and long lasting anxiety. I can be fine for years (even show slightly reckless and fearless behaviour) and then some type of negative thought process gets going and I become a nervous wreck. I have an obsessive mind. I talk about the same subjects again and again, and have done well academically because of this. (Do not register very highly on the autistic spectrum though).
I had an SWI scan and it came back perfectly normal.
Why is it the case that if symptoms do not continue there is generally not a problem -- and what is meant by a "problem"? Also, I was under the impression that there currently exists no scan that can pick-up a concussion/mtbi?
As for why I obsess about it? Probably a fear of losing something that my happiness depends upon -- i.e. my functioning brain, which I have built my confidence upon. I am trying to write a book at the moment and have invested everything in it. It is like a dancer who breaks their leg or ruptures their achilles tendon. The average person -- including myself -- could get over that, but for the dancer it threatens to destroy his or her world.
I appreciate your mild annoyance. I am not as narcissistic and self-indulgent and this exchange may make me appear.
Last two questions: when symptoms are delayed do they manifest in an obvious and forceful way -- i.e. in a way that would be very noticeable? Like blurred vision, losing balance, being really confused about everything?
I can imagine that someone might be so out-of-it that they might not even register that there was a problem, but if someone was coherent enough to hold a reasonable challenging conversation, order a cab and navigate their way around an un-familiar city (all things I did that day) that person would (in all probability) be coherent enough to recognise the symptoms of a concussion -- and they would be more obvious than just feeling a bit tired, as I did?
Also once, the symptoms manifest, they are probably going to be hanging around for a few days at the minimum. I ask because after sleeping on a train for about 4 hours on my way home, I woke up and felt almost completely recovered from the period of tiredness. Would it be right to say that was not consistent with a concussion?