Everything You Wanted to Know About the Longest Nerve in the Body

Like a highway system, the vagus nerve branches profusely from your brain through your organs to marshal bodily functions, including aspects of the mind such as mood, pleasure and fear

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https://www.smithsonianmag.com/science-nature/everything-you-wanted-to-know-about-the-longest-nerve-in-the-body-vagus-180985045/