Head Talk

The AP did a survey of NFL players and the results were surprising.

Thirty of 160 NFL players surveyed from Nov. 2-15 replied that they have hidden or played down the effects of a concussion.

The AP embarked on the most extensive series of interviews about concussions since the subject became a major issue this season, talking to five players on each of the 32 teams -- nearly 10 percent of the league -- seeking out a mix of positions and NFL experience to get a cross-section of players.