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Neurosurgery. 2004 May;54(5):1073-78; discussion 1078-80.

Duration of cognitive impairment after sports concussion.

Author information

1
National Rehabilitation Hospital, Washington, District of Columbia 20010, USA. joseph.bleiberg@medstar.net

Abstract

OBJECTIVE:

We sought to determine the duration of cognitive impairment after sports concussion.

METHODS:

We conducted a study with a prospective design in which 729 athletes underwent preseason baseline testing by being administered a computerized neuropsychological test battery, followed by retesting at regular intervals after they sustained sports-related concussions. A control group consisting of nonconcussed athletes drawn from the same baseline population underwent testing at parallel intervals.

RESULTS:

Cognitive impairment in this primarily American Academy of Neurology Grade II sample of boxing concussions was apparent on the day of injury and at 1 to 2 days postinjury. Recovery of cognitive performance occurred during the 3- to 7-day interval. Comparison with control subjects showed that absent or attenuated practice effects, in addition to frank deterioration from baseline, were indications of recent concussion.

CONCLUSION:

The present findings of recovery during the 3- to 7-day interval postinjury are consistent with the American Academy of Neurology Grade II return-to-play practice parameters suggesting a 1-week time-out from participation in contact sports.

PMID:
15113460
[Indexed for MEDLINE]
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