Happy And Sad Tears Confused

We cry when we are happy because the hypothalamus in our brain cannot tell the difference between intense happiness and sadness. The amygdala first registers our emotional reaction and sends a strong signal to the hypothalamus, which then activates the autonomic nervous system. When the parasympathetic branch takes over, it stimulates acetylcholine receptors on the lacrimal glands, causing our tear ducts to produce tears in moments of joy, relief, stress, or sorrow alike.

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