Question: How long dose it take for your brain to understand what your telling it to do and do it ?

Jess Wade answered on 17 Jun 2015:

Very little time- actually, most of the time our brains know what we’re thinking before we do ! If we think about how quickly brains respond to images, scientists have just found out it takes 13 milliseconds for us to respond to an image- that’s only 0.013 seconds. They did some cool experiments flashing pictures at different people really quickly and measured how quickly they responded to the picture changing.