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Scientists have long been fascinated with the concept of "muscle memory", that subconscious part of our brain that controls movement without us having to think about it. It's what allows us to do complicated tasks such as riding a bike or typing "the quick brown fox jumps over the lazy dog" without having to stop and say, OK, I need to contract my left hamstring while extending my right quadricep and all those tricky things that go into motion. It's what allows me to tie a knot during surgery ... Read more »