What is this article about?
Ever been reading a really stellar book, sitting at the beach, drinking a canned soft drink? You’re lost, engrossed in your novel and never once look down at that drink. Yet, without fail, your arm drops down, your hand cups, your fingers lightly grip that can of fizz and the perfect number of actin-myosin cross-bridges activate to bring that drink to lips. There isn’t a jerk or a tremor or a single carbonated drip. Your body functions like a machine. You have just operated at the pleasure of your body’s well-honed proprioceptive loops.