Research Reports - Do sport-related concussions result in long-term cognitive impairment?

Int J Psychophysiol. 2017 Oct 18. pii: S0167-8760(17)30600-1. doi:
10.1016/j.ijpsycho.2017.10.006. [Epub ahead of print]

Brush CJ(1), Ehmann PJ(1), Olson RL(2), Bixby WR(3), Alderman BL(4).

Sport-related concussions have become a major public health concern although the
long-term effects on cognitive function remain largely unknown. Event-related
potentials (ERPs) are ideal for studying the long-term impact of sport-related
concussions, as they have excellent temporal precision and provide insight that
cannot be obtained from behavioral or neuropsychological measures alone. We
reviewed all available published studies that have used stimulus or
response-locked ERPs to document cognitive control processes in individuals with
a history of concussion. Collectively, cross-sectional evidence suggests
consistent reductions in P3 amplitude in previously concussed individuals, as
well as a possible impairment in cognitive processing speed (P3 latency) and
error monitoring processes (ERN). The persistent neurophysiological changes found
may be related to the number of previous concussions sustained and the time since
injury. Future studies incorporating prospective research designs are warranted
before definitive statements can be offered regarding the long-term impact of
sport-related concussions on cognitive control. 

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