A new type of brain implant can help improve walking among Parkinson’s disease patients by providing real-time stimulation in response to each stride, a new study says.
The deep brain stimulation tool can detect neural signals associated with each step and automatically adjust its electrical pulses within fractions of a second, researchers reported June 15 in the journal Nature Medicine.
In a manner similar to a heart pacemaker, the implant responds to the brain’s rhythm of walking, researchers said.
“Difficulty walking is one of the most disabling symptoms of Parkinson’s disease and one of the hardest to treat,” senior researcher Dr. Doris Wang, an associate professor of neurological surgery at the University of California-San Francisco (UCSF), said in a news release.
“Walking is a highly dynamic behavior that requires precise timing across both sides of the body,” she continued. “We developed a system that can recognize those movement patterns and respond in real time, effectively allowing the stimulation to work with the patient as they move.”
Deep brain stimulation (DBS) has been shown to dramatically improve Parkinson’s symptoms like tremors, stiffness, and slowness, but not as much with patients’ movement symptoms, researchers said in background notes.
This might be because a person’s gait is constantly changing, with every step requiring rapid coordination of the brain, spinal cord, and muscles, researchers said.
By comparison, standard DBS delivers a fixed pattern of electrical pulses that don’t vary based on the patient’s current activity levels.
To address this, researchers developed a system that identifies the brain waves associated with right and left leg movement. These signals are transmitted directly to the brain implant, allowing the device to automatically adjust its stimulation.
“The brain contains remarkably rich information about movement,” lead researcher Kenneth Louie, a UCSF post-doctoral scholar, said in a news release. “We found that we could identify neural signatures linked to each step and use them to guide stimulation in real time.”
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To test the system, researchers recruited five people with Parkinson’s who had received DBS implants. As part of a research program, these folks also had electrodes placed over the movement-related areas of the brain.
These electrodes could track brain signals related to walking and relay them to the implant, which was reprogrammed to automatically adjust therapy in real time.
In lab tests, the new system improved patient’s gait symmetry and walking patterns. The system also helped participants in their daily lives, reducing their fall risk.
These results provide early evidence that timing brain stimulation to a person’s behavior might improve control over Parkinson’s symptoms, researchers said.
“This study is about more than walking,” Wang said. “It demonstrates that brain stimulation can adapt to what a person is doing in real time. That opens the door to future therapies that respond dynamically to movement, speech, mood, cognition, and other brain functions.”
He continued: “Instead of delivering the same stimulation all day long, future devices may continuously listen to the brain and immediately respond to a patient’s needs. Just as pacemakers transformed the treatment of heart disease, intelligent neurostimulators may transform how we treat disorders of the brain.”
More information
The Parkinson’s Foundation has more on deep brain stimulation.
SOURCES: University of California-San Francisco, news release, June 15, 2026; Nature Medicine, June 15, 2026
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