From Thought to Movement · Muscles
Small units first, big ones only when needed.
Pick up a pencil and your body switches on its smallest motor units. Pick up a suitcase and it keeps adding larger ones until the job is covered. It always starts small — and that ordering is automatic.
There's more: small units first, big ones only when needed. The full explanation — and the interactive version you can tap and quiz yourself on — lives in the app.
Body Atlas is an educational product. It does not provide diagnosis, treatment, or personal medical advice. · Privacy