During her time on the run, she managed to stumble upon an article in a Muggle magazine about the dangers of concussions on a person's mental capabilities. Professional athletes were often at risk of long-term damage when they were in the boxing ring or playing on the American football field. It had been fascinating and upsetting all at the same time. Hermione tried to remember all of the times she'd experienced some damage to her head over the course of her life. There were too many to identify. Certainly being petrified by a basilisk and the better part of a year of constant time traveling couldn't have helped. The tumble down the stairs most definitely resulted in a hurt head. Years of raids and physical violence made pinning down every incident where long-lasting damage could have been done to her head impossible.