DAYTONA BEACH, Fla. (AP) — NASCAR will likely require baseline concussion tests for all drivers in 2014. Steve O'Donnell, NASCAR's senior vice president of racing operations, said officials have also urged drivers to get an ImPACT test before this season.

The test is used by many professional sports leagues, including the NFL, to assess concussions and determine when an injured athlete can safely return to play.

The ImPACT test has transformed the way concussions are managed by giving a tangible measure of what's going on in the brain. It's a computer-based series of fast-paced quizzes involving words, pictures and colors. Scores reflect how quickly and correctly the questions are answered.