Researchers conducted a small study to understand how a focused ultrasound brain procedure for essential tremor works when performed on both sides. They looked at 15 patients who received the treatment, called MRgFUS thalamotomy, on one side of the brain and then later on the other side. The study focused on detailed brain scans to measure the size, location, and shape of the tiny lesions created by the ultrasound energy.
The main finding was that the procedure created lesions of similar size on both sides of the brain. However, the target spot for the second treatment was consistently shifted a small amount forward and upward compared to the first. Most side effects after the second procedure were mild and temporary, with walking difficulties being the most common issue that lasted at least a month.
It is important to be careful with these results. This was a small, observational study from one medical center that only looked at brain imaging and procedure details. It did not measure how well the treatment controlled patients' tremors. The findings cannot tell us if the small targeting shift matters for long-term outcomes or if it is linked to side effects. For now, this research provides preliminary technical details for doctors performing this procedure.