Let’s say, for example, that you are hit by a car. Your brain registers the noise of the car screeching to a halt, the grille speeding toward you. It shoots out an onslaught of stress chemicals like adrenaline and cortisol that elevate your heart rate and blood pressure, narrowing your focus to the thump of the impact and the pain and the sound of an ambulance. But at the same time, your brain is subconsciously taking in thousands of other pieces of stimuli: the foggy weather, the Krispy Kreme at the intersection, the color and make and model of the car, the Midwestern accent of the guy who
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