vagus nerve

gut brain axis illustration showing the vagus nerve carrying upward signals from the gut to the brain
Science Made Simple Why It Happens

The Gut-Brain Axis: How Your Stomach Talks to Your Brain

Neuroscience illustration explaining why do we cry when happy — dimorphous emotional expression and vagus nerve lacrimal activation
Brain & Psychology

Tears of Joy: Why Do We Cry When Happy? The Neuroscience Explained

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