Doctors stimulate a nerve in the neck to treat epilepsy, heart failure, stroke, arthritis, and a half dozen other ailments “This is a bottle of pills,” says J.P. Errico, showing me something that’s obviously not a bottle of pills. Errico, who is cofounder and CEO of ElectroCore Medical, is holding the GammaCore, a noninvasive vagus … Continue reading The Vagus Nerve: A Back Door for Brain Hacking