Deep brain stimulation (DBS) can help people with Parkinson’s move easier. New research shows the treatment works by hitting a fast brain rhythm that connects important parts of the brain.
The study was done by scientists from hospitals and universities in Cologne, Düsseldorf, Harvard, and Berlin. They mixed two methods—recording brain signals and taking brain images—to see where and when the signals happen.
Professor Andreas Horn, the lead researcher, says they found a clear network that lights up at 20‑35 hertz. When this network is strong, patients improve more.
DBS usually targets the subthalamic nucleus, a tiny area deep inside the brain. Small electrodes send gentle electric pulses to this spot.
Earlier work only looked at where the electrodes should be placed or what frequencies the brain uses, but not both together. This new work records both at the same time.
The team studied 50 patients, recording signals from the implanted electrodes and from a magnetoencephalography (MEG) scanner. They linked deep brain areas with outer brain regions.
They discovered that the connection between the subthalamic nucleus and the frontal brain works mostly at 20‑35 Hz. The stronger this link, the more the patient’s movement got better after surgery.
Understanding this rhythm could let doctors fine‑tune DBS settings for each person, especially when current settings don’t help enough.
The researchers will keep studying how DBS changes brain networks. Their work was supported by the Professor Klaus Thiemann Foundation.