Are Emotions Contagious?

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Mirror neurons fire in the brain when an act is both performed and observed. In a study where participants were shown faces for a mere 30 milliseconds, their faces activated the muscles to mimic that facial expressions even before they could recognize the expression.

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Key Facts In This Video

  1. Humans mimic each other's facial expressions, postures, and elements of speech without realizing it. 00:18

  2. Human brains have "mirror neurons", neurons that fire when an action is performed and when it is observed. 00:46

  3. Some neuroscientists believe mirror neuron theory has been over-generalized. 02:34

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