Like a highway system, the vagus nerve branches profusely from your brain through your organs to marshal bodily functions, including aspects of mind such as mood, pleasure, and fear.
However, some people have taken the vagus nerve’s expansive bodily influence as an invitation to engage in pseudoscience. In some corners of the internet, so-called polyvagal therapy—physical or breathing exercises that some claim reset the vagus nerve—is proposed to address just about any disorder of the mind or body. There’s little to no evidence that these popular remedies are anything but placebos.
Always…