August 14, 2026

@michaelokun

Can we teach deep brain stimulation to walk? Adaptive deep brain stimulation (aDBS) is DBS that can listen to brain signals and automatically adjust stimulation in real time. Now, the next frontier may be teaching DBS to recognize not only what the brain is doing, but what the person is doing. Cury and Aquino describe in a new "Hot Topic" article in Movement Disorders two remarkable recent Nature Medicine studies asking whether DBS can recognize walking and even synchronize stimulation to individual phases of each step. Key points: - Scafa and colleagues studied 35 folks w/ Parkinson’s disease and showed that activity in the subthalamic nucleus could distinguish locomotor behaviors such as sitting, standing and walking. They then used machine learning to help DBS adapt to the activity being performed. - Louie and colleagues took a different approach in 5 folks, identifying personalized brain signals associated w/ the swing phase of the leg and then changing stimulation in real time during the gait cycle. This gait-synchronized aDBS improved step variability and symmetry compared w/ continuous DBS. - Together, these studies move us beyond DBS that simply responds to an abnormal brain signal. The emerging idea is behavior-guided DBS that may know whether you are sitting, standing or walking and potentially even where you are within an individual step. My take: This is where DBS gets really interesting. Walking is not a single brain state. It is dynamic, rhythmic and constantly changing. Why should we expect one continuous stimulation setting to be optimal for sitting, standing, walking, turning and navigating an obstacle? These studies suggest the future may be DBS that listens, recognizes what you are doing and then delivers the right stimulation at the right moment. The technology is early and the numbers are small, however the concept is potentially transformative. The brain appears to contain enough information for implanted DBS devices to recognize different locomotor activities, opening the door to activity-specific stimulation.