Parkinson’s disease is a serious brain disorder that slowly affects movement over time. Millions of people around the world live with this condition.
It can cause shaking, stiffness, slow movement, balance problems, and trouble walking. As the disease progresses, even simple daily tasks such as getting dressed, writing, or eating can become difficult.
Doctors currently use several treatments to help manage Parkinson’s disease. Medications can reduce symptoms for many people, especially in the early stages. However, medicines often become less effective over time, and some patients develop side effects after using them for many years.
For people with more advanced symptoms, one of the most effective treatments is deep brain stimulation, also called DBS. In this treatment, surgeons implant thin electrodes deep inside the brain.
These electrodes send electrical signals to specific brain regions that control movement. DBS can improve tremors, stiffness, and slow movement for many patients.
Although DBS can work very well, it requires brain surgery, which carries risks such as infection, bleeding, and complications from implanted devices. Because of this, scientists have been searching for safer and less invasive ways to stimulate deep brain areas without surgery.
Now, researchers say they may have found a promising new approach.
A new pilot study published in the journal eBioMedicine tested a technique called transcranial temporal interference stimulation, or TIs. This method uses electrical currents placed on the scalp to target deep parts of the brain from outside the skull.
Unlike standard brain stimulation methods that mostly affect surface brain regions, TIs uses overlapping electrical signals that combine deep inside the brain. Scientists believe this allows them to reach deeper structures without surgery.
In the new study, researchers focused on a brain area called the subthalamic nucleus. This region plays an important role in controlling movement and is already a common target for deep brain stimulation surgery in Parkinson’s disease patients.
The clinical trial included 30 people with early- to mid-stage Parkinson’s disease. The study was carefully designed as a randomized, double-blind, sham-controlled crossover trial. This means neither the patients nor the researchers knew which treatment was active during each session, helping reduce bias in the results.
Each participant received a single 20-minute session of real TIs treatment and a separate session with a fake or placebo treatment.
The results were encouraging.
Researchers found that patients who received the real brain stimulation showed significantly greater improvement in movement symptoms compared to the placebo treatment. The benefits appeared immediately after stimulation and lasted for at least one hour.
The scientists used a standard medical test called the Movement Disorders Society Unified Parkinson Disease Rating Scale, Part III, to measure changes in movement symptoms.
According to the results, around 70% of patients experienced meaningful improvement after receiving TIs treatment. In comparison, only about 15% improved after the placebo treatment.
The strongest improvements were seen in bradykinesia, which means slowness of movement, and tremor, one of the most recognizable symptoms of Parkinson’s disease.
The treatment appeared less effective for rigidity and balance-related problems, although researchers say more studies are needed to fully understand which symptoms respond best.
Importantly, the treatment appeared safe and well tolerated.
No serious side effects were reported during the study. Some participants experienced mild sensations such as tingling or warmth on the scalp, but these feelings occurred at similar rates in both the real and placebo sessions.
Because the treatment does not require surgery or implanted devices, researchers believe it could someday provide a safer alternative for some patients.
Dr. Alvaro Pascual-Leone from Hebrew SeniorLife and Harvard Medical School explained that TIs represents a completely new approach to noninvasive brain stimulation because it may reach deep brain targets without surgery.
Researchers also emphasized that different brain areas may produce different effects. Future studies will try to identify the best brain targets for different Parkinson’s symptoms and different patients.
The scientists are already planning larger studies involving repeated stimulation sessions over several days. They hope to learn whether the improvements can last longer and whether repeated treatments could produce stronger benefits over time.
Researchers also want to understand how often treatment should be given and which patients are most likely to respond.
Another promising feature of the technology is its ability to personalize treatment. Scientists can adjust the stimulation based on each patient’s individual brain anatomy, which may allow more precise therapy in the future.
Experts say this personalized approach could become very important because Parkinson’s disease affects patients differently. Some people mainly experience tremors, while others struggle more with stiffness, walking, or balance.
Although the findings are exciting, researchers caution that this was still a small pilot study involving only 30 patients and only short-term effects after one treatment session.
Much larger studies will be needed before doctors know whether TIs can become a routine treatment for Parkinson’s disease.
Scientists will also need to study whether the treatment remains safe and effective over months or years of repeated use.
Still, many experts believe the results are an important step forward.
If future research confirms these findings, transcranial temporal interference stimulation could open the door to a new generation of non-surgical brain treatments that provide benefits similar to deep brain stimulation without the need for implants or invasive procedures.
If you care about Parkinson’s disease, please read studies that Vitamin B may slow down cognitive decline, and Mediterranean diet could help lower risk of Parkinson’s.
For more information about brain health, please see recent studies that blueberry supplements may prevent cognitive decline, and results showing Plant-based diets could protect cognitive health from air pollution.
The study was published in eBioMedicine.
Source: Hebrew SeniorLife.
