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Psychology

Why your tongue sticks out when your fingers work

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When engaging in a highly precise physical task like threading a needle, you might unconsciously bite your lip or stick out your tongue. This is motor overflow. The intensely concentrated signals sent to your hands leak into adjacent neural real estate, causing entirely unrelated facial muscles to tense up. Your face is basically flexing just because your fingers are working too hard.

Why your tongue sticks out when your fingers work
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