Cognitive effects of one season of head impacts in a cohort of collegiate contact sport athletes.

Abstract:

OBJECTIVE:To determine whether exposure to repetitive head impacts over a single season negatively affects cognitive performance in collegiate contact sport athletes. METHODS:This is a prospective cohort study at 3 Division I National Collegiate Athletic Association athletic programs. Participants were 214 Division I college varsity football and ice hockey players who wore instrumented helmets that recorded the acceleration-time history of the head following impact, and 45 noncontact sport athletes. All athletes were assessed prior to and shortly after the season with a cognitive screening battery (ImPACT) and a subgroup of athletes also were assessed with 7 measures from a neuropsychological test battery. RESULTS:Few cognitive differences were found between the athlete groups at the preseason or postseason assessments. However, a higher percentage of the contact sport athletes performed more poorly than predicted postseason on a measure of new learning (California Verbal Learning Test) compared to the noncontact athletes (24% vs 3.6%; p < 0.006). On 2 postseason cognitive measures (ImPACT Reaction Time and Trails 4/B), poorer performance was significantly associated with higher scores on several head impact exposure metrics. CONCLUSION:Repetitive head impacts over the course of a single season may negatively impact learning in some collegiate athletes. Further work is needed to assess whether such effects are short term or persistent.

journal_name

Neurology

journal_title

Neurology

authors

McAllister TW,Flashman LA,Maerlender A,Greenwald RM,Beckwith JG,Tosteson TD,Crisco JJ,Brolinson PG,Duma SM,Duhaime AC,Grove MR,Turco JH

doi

10.1212/WNL.0b013e3182582fe7

subject

Has Abstract

pub_date

2012-05-29 00:00:00

pages

1777-84

issue

22

eissn

0028-3878

issn

1526-632X

pii

WNL.0b013e3182582fe7

journal_volume

78

pub_type

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