Here's an application of ultrasound towards essential tremors that is already being used on people! https://www.usnews.com/news/health-news/articles/2019-11-20/

Here's an application of ultrasound towards essential tremors that is already being used on people! https://www.usnews.com/news/health-news/articles/2019-11-20/ultrasound-may-ease-common-form-of-hand-tremor https://www.usnews.com/news/health-news/articles/2019-11-20/... Transcranial ultrasound + monitoring via MRI. Requires a rock-solid transmitter clamped on the skull.