Neurocognitive tests key to assessing concussions

By Jennifer C. Yates

Associated Press

Published: Saturday, Nov. 20 2010 12:00 a.m. MST

PITTSBURGH — More than a month after sustaining a concussion, Luke Kusler was having trouble focusing in class, getting irritated easily, and feeling his body veer to one side when he walked down crowded school hallways.

The 13-year-old right tackle was sidelined by a big shot early in the season and doctors looking at his results on a post-concussion test were wondering if those crushing hits might have ended his playing days.

Even so, the 6-foot, 200-pound eighth-grader was itching to get back into the game.

"I'm a lineman," he said. "That's what we do."

Luke's doctor had given him the ImPACT test, which has gained wide use in the U.S. as awareness about concussions and their long-term effects has risen in recent years. Doctors say ImPACT and other neurocognitive exams have transformed the way concussions are managed by giving a tangible measure of what's going on in the brain — and proof for eager athletes that their heads may not be ready to take the next hit.

"There will always be concussions. The key is trying to prevent long-term injuries," said Dr. Mark Lovell, a founding director of the University of Pittsburgh Medical Center Sports Medicine Concussion Program and ImPACT's co-creator.

ImPACT, which stands for Immediate Post-Concussion Assessment and Cognitive Testing, is a 20-minute, computer-based series of fast-paced quizzes involving words, pictures and colors. Scores reflect how quickly and correctly the questions are answered, and are compared to a baseline test that athletes take at the beginning of a season.

"Think of it as a stress test for the brain," Lovell said. "It tells us something about what's going on for that individual and it makes it very hard to hide their symptoms."

The test was developed in the early 1990s by Lovell and Dr. Joseph Maroon, the longtime neurosurgeon for the Pittsburgh Steelers. Maroon was irritated when then coach Chuck Noll asked him what proof he had to keep an injured player out of the game.

"He challenged everything and I was really upset by that," Maroon said. "He was right. Where was my proof?"

The Steelers began baseline testing of all their players using ImPACT in 1997. The practice was later adopted by the NFL for all players in 2001, and the NHL, MLB and other professional leagues followed suit.

The tests are now given to more than 4 million college, high school and youth athletes in the U.S. High schools pay $500 to $700 per year to use ImPACT; pro teams pay about $1,000 a year.

ImPACT is the most widely used test in the U.S., but other companies such as New York-based Headminder offer similar exams. The potential market is huge: the Centers for Disease Control and Prevention estimates that about 38 million children between 5 and 18 play sports.

Australian-based CogState started marketing its CogSport test in the U.S. in August as Axon Sports. The test is taken online, and can be purchased for a one-time use at a cost of $7.50. Parents can administer the test on their home computer to get a baseline and then follow-up with a physician if an injury occurs.

Doctors say none of the tests should be the only factor a doctor or athletic trainer considers when making return-to-play decisions. The patient's medical history, strength, coordination and balance also need to be weighed.

The tests also can be influenced if the athlete is fatigued or distracted, or motivated to get back in the game, said Dr. Jeffery S. Kutcher, the director of Michigan NeuroSport and a member of the American Academy of Neurology.

"These programs are really an extension of our physical examination and they should never be used to diagnose concussion or make a return-to-play decision without seeing a physician," the neurologist said.

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