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Now, a new crop of buzzy non-invasive VNS gadgets promises to relieve stress, sharpen focus and improve sleep in mere minutes ...

In contrast, the parasympathetic nervous system allows ... The vagus nerve is one of the cranial nerves that emerges from the brain. It extends widely into multiple tissues and organ systems.

Patients usually present with elevated blood pressure and bradycardia. Noxious stimuli to intact sensory nerves below the injury lead to relatively unopposed sympathetic outflow and dangerous blood ...