# How the brain composes simple rules into complex control

A new study reveals the neural basis of compositional control—the ability to combine simple rules into complex, goal-directed actions. The findings identify specific prefrontal cortex circuits that represent and flexibly combine task rules, shedding light on cognitive flexibility and its disorders.

**Importance:** 3/5

## Sources

### Science
- [Nature](https://www.nature.com/articles/s41586-026-10896-8) — 2026-08-12