# Heart's 'little brain' protects against stress

Researchers have found that the heart possesses its own complex neural network, often called a "little brain," which helps it respond to and protect against stress. This intrinsic system can modulate heart function independently of the brain, potentially offering new targets for treating stress-related heart conditions. The discovery underscores the heart's autonomous role in managing physiological stress.

**Importance:** 3/5

## Sources

### Science
- [Nature](https://www.nature.com/articles/d41586-026-02269-y) — 2026-07-22