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.
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.
Authors: Kevin M Guskiewicz; Scott L Bruce; Robert C Cantu; Michael S Ferrara; James P Kelly; Michael McCrea; Margot Putukian; Tamara C Valovich McLeod Journal: J Athl Train Date: 2004-09 Impact factor: 2.860
Authors: K M Guskiewicz; S L Bruce; R C Cantu; M S Ferrara; J P Kelly; M McCrea; M Putukian; T C Valovich McLeod Journal: Br J Sports Med Date: 2006-01 Impact factor: 13.800
Authors: P McCrory; K Johnston; W Meeuwisse; M Aubry; R Cantu; J Dvorak; T Graf-Baumann; J Kelly; M Lovell; P Schamasch Journal: Br J Sports Med Date: 2005-04 Impact factor: 13.800