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What Is the Cannon-Bard Theory?

By Kendra Van Wagner, About.com

Definition: The Cannon-Bard theory of emotion states that we feel emotions first and then experience physiological reactions such as sweating, trembling, and muscle tension. More specifically, it is suggested that emotions result when the thalamus sends a message to the brain in response to a stimulus, resulting in a physiological reaction.

For example: I see a snake --> I am afraid --> I begin to tremble.

According to this theory, we must feel an emotion before we can have a reaction.

The Cannon-Bard theory of emotion differs from other theory of emotion such as the James-Lange theory of emotion, which argues that physiological responses occur first and result and are the cause of emotions.

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