Essential tremors, uncontrollable shaking of the hands, arms, and other parts of the body, have been traditionally treated through drugs or surgery. Cala Health is providing a new option to patients with its wristwatch-like neuromodulation device that uses electrical pulses to stimulate peripheral nerves to treat the condition. We spoke to Renee Ryan, CEO of Cala Health, about the company’s Cala Trio device, the potential for bioelectric medicine to treat a broader range of neurologic, psychiatric, and cardiologic indications; and what it will take to get payers and providers to embrace the technology.