A meta-analysis of heart rate variability and neuroimaging studies: Implications for heart rate variability as a marker of stress and health

hrv · Neuroscience & Biobehavioral Reviews, 36(2), 747–756 · 2012

Thayer (2012) showed that your heart is basically a snitch: it tells the world exactly how much control your prefrontal cortex actually has over your impulses.