Ryan Collison

Part 7 of Polyvagal Through the Coherence Lens Safety isn’t the absence of danger. It’s active suppression. The common understanding of calm is passive—the absence of arousal, the lack of threat signals, the system at rest. But polyvagal theory reveals something more interesting: the ventral vagal state

Part 6 of Polyvagal Through the Coherence Lens Your heart and lungs are dancing. Sometimes they step on each other’s feet. The previous article introduced respiratory sinus arrhythmia—the phenomenon where heart rate rises with inhale and falls with exhale. But RSA is just the most visible component of

Part 5 of Polyvagal Through the Coherence Lens Evolution left you one lever. Learn to use it. You cannot directly control your heart rate. You cannot voluntarily adjust your vagal tone. You cannot consciously modulate your adrenaline, cortisol, or inflammatory markers. The autonomic nervous system—the clue is in the

Part 4 of Polyvagal Through the Coherence Lens You’re running a simulation of your own organs. Sometimes it crashes. The brain does not receive raw data from the body. It generates predictions—models of what the heartbeat should feel like, what the gut should be doing, what the muscles

Part 3 of Polyvagal Through the Coherence Lens Your heartbeat contains your biography. Not metaphorically. The interval between beats—the subtle variation from one heartbeat to the next—carries information about autonomic state, emotional regulation capacity, and physiological flexibility. This variation is measurable. It correlates with outcomes. It changes with

Part 2 of Polyvagal Through the Coherence Lens The vagus nerve doesn’t read your affirmations. This is not cynicism about positive thinking. It is a statement about neuroanatomy. The circuits that determine whether you feel safe operate below the level of conscious cognition. They were doing their job for