From Thought to Movement · Muscles
Roughly a fifth of a second, spent mostly on deciding.
From seeing something to moving in response takes around 0.2 seconds. Most of that isn't the nerve signal travelling — the signal is fast. It's the deciding.
There's more: roughly a fifth of a second, spent mostly on deciding. The full explanation — and the interactive version you can tap and quiz yourself on — lives in the app.
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