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Neurology. 2001 Aug 14;57(3):524-6.

Persistent prolongation of simple reaction time in sports concussion.

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Defense and Veterans Head Injury Program, Walter Reed Army Medical Center, Washington, DC, USA.


A baseline computerized cognitive assessment was completed by 483 military cadets before their initial school year. Fourteen cadets concussed during physical education boxing were retested <1 hour after injury and again on return to full activity 4 days later. Compared with baseline testing, postinjury performance on simple reaction time and continuous performance tests was significantly slowed, even after cadets experienced resolution of physical symptoms and were cleared to resume full activity. These findings may be relevant to current concussion management guidelines.

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