A person who experiences highly variable cognitive function is likely to be more infectious and experience more symptoms after exposure to a respiratory virus. An experiment conducted by researchers from the University of Michigan, Duke University School of Medicine, and the University of Virgini
has revealed that fluctuations in alertness and reaction time could indicate a heightened risk of viral illness.
The team studied a cohort of 18 healthy volunteers who took brain performance tests three times per day for three days and then were exposed to a cold virus known as human rhinovirus. The software provided 18 measures of cognitive function including reaction time, attention, and rapid switching between numbers and symbols, which were combined to derive an index of variability.
“This is an interesting observation in a relatively small study. I hope that there will be a chance to confirm these findings in a larger, more definitive study,” said Ronald Turner, professor emeritus of pediatrics at the University of Virginia, who ran the experiment.
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