Psychology
How smiling (even fake) reduces stress: what micro-muscle activation signals to your brain
Discover how even a fake smile eases stress: micro-muscle activation triggers facial feedback, calms the amygdala, boosts vagal tone, and lowers cortisol.
![Illustration of [a smiling person with highlighted zygomaticus major and orbicularis oculi micro-muscles sending calming signals to the brain to reduce stress]](https://www.menuthai-fleet.co.uk/wp-content/uploads/2025/11/how-smiling-even-fake-reduces-stress-what-micro-muscle-activation-signals-to-your-brain-768x431.jpg)








