1. A method of treating a disorder in a patient, the method comprising: positioning a device adjacent to a skin surface of the patient; generating a single signal comprising one or more electrical impulses with said device; and transmitting the one or more electrical impulses to a vagus nerve in the patient, wherein the one or more electrical impulses comprising bursts of pulses with a silent inter-burst interval between each of the bursts, wherein each of the bursts and the silent inter-burst interval repeats from about 3 Hz to about 100 Hz, wherein each of the pulses has a duration from about 50 microseconds to about 1000 microseconds, and wherein the one or more electrical impulses generates an electric field at the vagus nerve above a threshold for generating action potentials within A and B fibers of the vagus nerve and below a threshold for generating action potentials within C fibers of the vagus nerve.