Citation

McAllister TW, Flashman LA, Maerlender A, Greenwald RM, Beckwith JG, Tosteson TD, Crisco JJ, Brolinson PG, Duma SM, Duhaime AC, Grove MR, Turco JH. Neurology 2012; 78(22): 1777-1784.

Affiliation

Departments of Psychiatry (T.W.M., L.A.F., A.M., M.R.G.), Community and Family Medicine (T.D.T.), and Medicine (J.H.T.), Dartmouth Medical School, Lebanon; Simbex (R.M.G., J.G.B.), Lebanon; Thayer School of Engineering (R.M.G.), Dartmouth College, Hanover, NH; Bioengineering Laboratory, Department of Orthopaedics (J.J.C.), The Warren Alpert Medical School of Brown University and Rhode Island Hospital, Providence, RI; Edward Via Virginia College of Osteopathic Medicine (P.G.B.), Blacksburg; Virginia Tech-Wake Forest (S.M.D.), Center for Injury Biomechanics, Blacksburg; Pediatric Neurosurgery (A.-C.D.), Children's Hospital at Dartmouth, Dartmouth Hitchcock Medical Center, Hanover, NH; and Pediatric Neurosurgery (A.-C.D.), Massachusetts General Hospital, Boston.

Copyright

(Copyright © 2012, Lippincott Williams and Wilkins)

DOI

10.1212/WNL.0b013e3182582fe7

PMID

22592370

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.

Keywords: American football;

Language: en