This interesting NYTimes article suggests that concussions sustained during football play can cause depression and ultimately lead to suicide. The football industry is less willing to accept this causality.
Excerpt:
Asked in 1994 by The Philadelphia Inquirer to count his career concussions, Mr. Waters replied, "I think I lost count at 15." He later added: "I just wouldn't say anything. I'd sniff some smelling salts, then go back in there."
Mr. Nowinski also found a note in the Inquirer in 1991 about how Mr. Waters had been hospitalized after sustaining a concussion in a game against Tampa Bay and experiencing a seizure-like episode on the team plane that was later diagnosed as body cramps; Mr. Waters played the next week.
