Your Heart May Quietly Shape How Your Brain Processes Information

Source: ScienceTwo side-by-side squares of color flicker on a screen, and a study participant is asked to press a button whenever one of them briefly changes hue. What they don't know is that one square tends to change at the moment their heart contracts, whereas the other changes between beats. Even though they don't realize it, they respond differently to the two squares. That result is one of many suggesting that the heart may affect how the brain processes...