Researchers studied a second ultrasound brain procedure for people with essential tremor, a condition that causes shaking that doesn't respond well to medication. The study followed 15 patients at one medical center who had already undergone one procedure and were getting a second one on the other side of the brain. They measured tremor severity using standard rating scales before and for 12 months after the second procedure.
The study found that after the second procedure, scores measuring hand tremor improved by about 58%, and scores measuring how much tremor affects daily life improved by about 69%. Head and voice tremor also improved. Most side effects were reported as mild and temporary. However, the researchers noted a selective decline in verbal memory for some patients one year after the procedure, while other thinking skills were preserved.
It's important to be careful with these results. This was a small, observational study at a single center without a comparison group, so we cannot say the procedure caused the improvements. The findings suggest this staged approach might be a potential option for some carefully selected patients, but larger, more rigorous studies are needed to confirm the benefits and understand the long-term risks, especially regarding memory.