As a follow-up to my recent post “Focus on Head Injuries”, there was an article yesterday regarding effects of repeated head trauma on National Hockey League players.
Similar to NHL players, people who strike their head in an accident, and who have had concussions in the past, are particularly vulnerable to a more serious head injury.
http://www.nytimes.com/2013/11/26/sports/hockey/retired-players-sue-nhl-over-head-injuries.html?nl=todaysheadlines&emc=edit_th_20131126&_r=0