ANATOMY

Detailed explanation-1: -In the neck, the vagus nerve provides required innervation to most of the muscles of the pharynx and larynx, which are responsible for swallowing and vocalization. In the thorax, it provides the main parasympathetic supply to the heart and stimulates a reduction in the heart rate.

Detailed explanation-2: -It’s called vagus nerve stimulation. Surgeons implant a device near the collarbone and run a wire to the vagus nerve. When the device fires it stimulates that nerve to send signals to the brain. This increases activity in areas that control mood.

Detailed explanation-3: -Parasympathetic activation (vagus nerve) exerts an inhibitory action on the heart: it slows conduction from the sinus node, leading to bradycardia, and reduces conduction via the atrioventricular node.