Journal of Neurology Neurosurgery & Psychiatry · 2006 · 161 citations · 13 references
Repeated concussion is associated with reliable decrements in cognitive performance--even after a three month window for recent recovery.
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Cumulative Effects Associated With Recurrent Concussion in Collegiate Football Players
Kevin M. Guskiewicz, Michael McCrea, Stephen W. Marshall et al. · JAMA · 2003 · 1.7K citations
Brain activation during working memory 1 month after mild traumatic brain injury
Thomas W. McAllister, Andrew J. Saykin, Laura A. Flashman et al. · Neurology · 1999 · 472 citations