If they've tried to make it as small as possible why have they stuck an LED on it, doesn't that defeat the point of it being small or at least hard to see or am I missing something.
English
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The article says [quote]These patches of sensors monitor electrical rhythms of the brain and can wirelessly transmit information optically (via LEDs) or electromagnetically (via flexible antennas) to provide quantitative measures of attentional modulation that co-vary with the progression of dementia, Alzheimer's disease, depression, and schizophrenia.[/quote]
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They can transmit information Via LED? Wow technology has come a long way, anyway I can see how that would be kinda useful although I still think they should concentrate on finding another way to transmit that information as having an LED flashing on someone's head may be a bit "weird" or distracting although I could see it becoming less of a nuisance/problem over time.