Football and cognitive function . . . and other stories

BMJ 2017; 358 doi: https://doi.org/10.1136/bmj.j4379 (Published 28 September 2017) Cite this as: BMJ 2017;358:j4379

Head trauma in school sports

A longitudinal study from Wisconsin has been following people who graduated from high school in 1957 (AMA Neurol doi:10.1001/jamaneurol.2017.1317). In view of current anxiety about the dangers of contact sports, it’s reassuring to learn that those who played high school football scored just as highly on tests of cognitive function when examined at age 65 as those who did not. They were no more likely to have symptoms of depression either.

Immunological responses to nanoparticles

Nanoparticles have an external dimension between 1 and 100 nm. That’s very small—a Herpes virion, by comparison, is 200 nm in diameter. Nanoparticles have …

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