18 PATHWAYS · MANY UNANSWERED QUESTIONS

Follow the connection.

Neural, vascular, immune, and metabolic routes—each with its own evidence.

Conceptual illustration of a brain and anatomical heart joined by luminous pathwaysCONNECTION ATLAS 01 / 18

Conceptual artwork · The pathways are illustrative, not anatomical nerve routes

Neural connection · Heart to brain

Can your heartbeat shape how you feel?

The conversation travels both ways. Cardiovascular signals contribute to the brain’s representation of our internal state, while the brain continually adjusts cardiac activity.

WHAT TO KEEP IN VIEW

That experiment does not show that a faster heartbeat alone causes anxiety in humans, or establish a treatment for anxiety.

Mixed evidence4 supporting sources

A wider view of the system.