Smart brain device zaps tremors only when needed

This study tests a new type of deep brain stimulator for people with essential tremor, a condition that causes uncontrollable shaking. Unlike standard devices that stimulate the brain constantly, this "closed-loop" system only delivers stimulation when it senses tremor activity. The goal is to reduce side effects like slurred speech and walking problems, and to make the battery last longer. Twenty adults with severe tremor that doesn't respond to medication will be enrolled to see if the smart device is safe and effective.